Skip to main content
hp-computer · HP Slim Desktop S01 · Vasai West

hp-computer HP Slim Desktop S01
Computer Keyboard/Mouse Not Working
in Vasai West

Expert diagnosis and repair for Computer Keyboard/Mouse Not Working on your hp-computer HP Slim Desktop S01 in Vasai West. Free doorstep pickup, genuine parts & 90-day warranty.

✓ ₹350 Inspection (Adjusted vs Repair) ✓ Free Doorstep Pickup ✓ Same-Day Repair ✓ 90-Day Warranty
WhatsApp to Book Inspection +91 74997 61196

Open 9 AM – 9 PM · 7 days · ₹350 inspection fee (adjusted vs repair)

Free
Diagnosis
90 Days
Repair Warranty
Same-Day
Turnaround
Free
Doorstep Pickup
OEM
Quality Parts
5 ★
Customer Rating
Same Day Repair 90-Day Warranty Genuine Parts Transparent Pricing Walk-in Welcome Free Pickup & Drop Since 2011 5/5 Rated Same Day Repair 90-Day Warranty Genuine Parts Transparent Pricing Walk-in Welcome Free Pickup & Drop Since 2011 5/5 Rated
Symptom Checker

Does Your hp-computer HP Slim Desktop S01 Show These Signs?

Common indicators of Computer Keyboard/Mouse Not Working on hp-computer HP Slim Desktop S01. Recognise 2 or more? Your device needs professional attention.

Some keys stuck, unresponsive or repeating

Keys output wrong characters or double-type

Keyboard affected by liquid spill

Keycaps are broken, popped off or missing

Keyboard backlight not working or flickering

Built-in trackpad unresponsive or erratic

Don't Ignore Computer Keyboard/Mouse Not Working

Unresolved hardware problems worsen over time and can cause secondary damage — increasing repair cost significantly.

Book Inspection (₹350)

hp-computer HP Slim Desktop S01 Computer Keyboard/Mouse Not Working in Vasai West in Vasai West — Comprehensive Guide

Skip the directories. Get direct service without middleman markup with Xigox.Every day, hundreds of Vasai West residents search for trustworthy Computer Keyboard/Mouse Not Working — and Xigox answers the call. Having completed thousands of hp-computer HP Slim Desktop S01 repairs in the Mumbai region, our Vasai West technicians combine speed with precision for Computer Keyboard/Mouse Not Working. From startups to student hostels in Vasai West, we've earned the trust that 5-star ratings prove: fast Computer Keyboard/Mouse Not Working with zero hassle.

Affordable Computer Keyboard/Mouse Not Working in Vasai West

High-quality Computer Keyboard/Mouse Not Working should be accessible in Vasai West. By optimizing our repair processes, we offer savings of up to half the cost compared to official repair outlets. You get the same stellar quality for your hp-computer HP Slim Desktop S01, at a fraction of the cost. Request a price estimate for Computer Keyboard/Mouse Not Working in Vasai West today.

Sustainable Computer Keyboard/Mouse Not Working Practices in Vasai West

Our team is dedicated to the environment in Vasai West. Rather than discarding your broken hp-computer HP Slim Desktop S01, our Computer Keyboard/Mouse Not Working gives it a second life. All e-waste are recycled through certified partners. When you opt for our Vasai West repair centre, you're not just saving money — you are actively contributing to protect the planet.

Post-Repair Quality Check after Computer Keyboard/Mouse Not Working

Completing the repair is just the first step at Xigox. Before your hp-computer HP Slim Desktop S01 is returned in Vasai West, it undergoes a comprehensive 20-point quality check. Our team ensures that your Computer Keyboard/Mouse Not Working was executed flawlessly, checking everything from wi-fi connectivity to keyboard response. This extreme attention to detail is why our return rate is so low across Vasai West.

Post-Repair Support for Computer Keyboard/Mouse Not Working

Every Computer Keyboard/Mouse Not Working handled by Xigox in Vasai West comes with a documented three-month warranty covering both parts and labour. That means, if the fault reappears within the warranty period, we redo it on us. Many repair shops in Vasai West won't back their work — Xigox gives you a printed warranty card every single time. Peace of mind is included.

Student & Educator Discounts for Computer Keyboard/Mouse Not Working

Are you an educator in Vasai West? We understand a reliable hp-computer HP Slim Desktop S01 is critical for online classes. That is why Xigox has introduced exclusive student discounts for Computer Keyboard/Mouse Not Working. Simply show your college ID when booking in Vasai West to instantly receive special pricing for your repair. Stop letting hardware problems disrupt your studies — contact us for student-friendly Computer Keyboard/Mouse Not Working.

Thousands of happy customers across Vasai West prove our quality. Xigox is your most reliable destination for Computer Keyboard/Mouse Not Working in Vasai West. Every repair comes with a written warranty, genuine parts, and complete transparency. Get your free estimate — WhatsApp us today.

Root Cause Analysis

What Causes Computer Keyboard/Mouse Not Working on hp-computer HP Slim Desktop S01?

Understanding the root cause helps our engineers perform a precise, lasting repair — not just a temporary patch.

Physical Damage

Accidental drops, pressure or impact causing mechanical damage to internal components.

Liquid Exposure

Water, beverages or humidity causing short circuits or corrosion on circuit boards.

Normal Wear & Tear

Components degrade naturally with regular use — batteries, connectors and hinges are most affected.

Manufacturing Defect

Factory faults that surface after the warranty period in certain production batches.

Cost Estimate

Repair Cost for hp-computer HP Slim Desktop S01 Computer Keyboard/Mouse Not Working

Transparent pricing · ₹350 inspection fee (adjusted vs repair) first · Pay only after approval

Repair Type Estimated Cost Warranty
CMOS Battery / BIOS Reset ₹200 - ₹500 3 Months
General PC Diagnostic ₹299 - ₹499 N/A
Power On Failure Diagnosis ₹299 - ₹499 N/A
Desktop PC Reassembly ₹300 - ₹600 1 Month
Mac Mini Diagnostic ₹499 - ₹799 N/A
Full PC Health Check & Tune-Up ₹499 - ₹999 1 Month

Inspection fee ₹350 — adjusted against your repair cost if you proceed. No work starts without your approval.

Get Exact Quote
Why Us?

Why Choose Xigox for hp-computer hp-computer HP ProDesk 400 G9 Repair in Vasai West?

With 1,00,000+ successful repairs and a 5-star rating, Xigox is Vasai West's most trusted independent hp-computer repair specialist. Serving all addresses in the 401202 postal zone.

Brand-Trained Technicians

Our engineers are specifically trained on hp-computer hardware — not generalists. Every repair is precise.

Genuine & OEM-Grade Parts

We use genuine hp-computer parts wherever available; otherwise OEM-certified compatible components.

90-Day Parts Warranty

Every repair backed by a written 90-day warranty. Same fault recurs? We fix it free of charge.

Same-Day Turnaround

Most hp-computer repairs in Vasai West completed same-day. Urgent service available for critical cases.

Full Transparency

We quote before starting work. No hidden fees. You pay exactly what you were quoted.

Lifetime Post-Repair Support

Free WhatsApp support for any questions about your hp-computer hp-computer HP ProDesk 400 G9 after repair — always.

1,00,000+
Devices Repaired
Since 2011
5 ★
Average Rating
44,883+ reviews
90 Days
Repair Warranty
Parts & labour
30 Min
Avg Response
For common issues
Free
Pickup & Drop
₹350 inspection fee
2011
Est. Since
15+ yrs in Palghar
Our Repair Facility

Real Technicians. 100% Guaranteed Work.

Most online repair websites outsource your device to random local shops. Xigox operates its own fully-equipped repair labs with dedicated BGA reballing stations and microscopic soldering equipment. When you trust us with hp-computer HP Slim Desktop S01, it stays securely in our controlled environment.

Every technician at Xigox is in-house trained and certified — no freelancers, no third-party sub-contractors. We invest in continuous training so our engineers stay ahead of the latest chipsets, display technologies, and component architectures.

Our lab follows strict data-confidentiality protocols. Your personal files, passwords, and accounts are never accessed during repair — guaranteed.

No Third-Party Outsourcing Strict Data Confidentiality Micro-Soldering Equipment Certified Engineers Only CCTV-Monitored Lab Genuine OEM-Grade Parts
Talk to a Technician WhatsApp Us
Technician diagnosing hp-computer HP Slim Desktop S01 Repair in Xigox Mumbai lab
Specialist Logic Board hp-computer HP Slim Desktop S01 Repair at Xigox repair facility
Xigox repair lab workbench — hp-computer HP Slim Desktop S01 Repair
Inside Xigox certified repair centre — hp-computer HP Slim Desktop S01 Repair
Our Process

How We Fix hp-computer HP Slim Desktop S01 Computer Keyboard/Mouse Not Working

A transparent, step-by-step process from booking to delivery — nothing hidden

01

Describe Your Issue

Call or WhatsApp +91 74997 61196. Tell us about the Computer Keyboard/Mouse Not Working on your hp-computer HP Slim Desktop S01 in Vasai West — no technical jargon required.

02

Free Doorstep Pickup

We dispatch a certified technician to your Vasai West address. Free pickup — no travel, no hassle, no waiting at a service centre.

03

Expert Diagnosis

Your hp-computer HP Slim Desktop S01 is inspected by a specialist. We identify the root cause of the Computer Keyboard/Mouse Not Working and provide a written quote — zero obligation.

04

Approved Repair

Once you approve the quote, we fix the Computer Keyboard/Mouse Not Working using OEM-grade parts. No work starts without your explicit consent.

05

12-Point QA Check

Every repaired hp-computer HP Slim Desktop S01 passes a rigorous 12-point quality assurance checklist. We verify the Computer Keyboard/Mouse Not Working is fully and permanently resolved.

06

Delivery + 90-Day Warranty

Your hp-computer HP Slim Desktop S01 is returned to your Vasai West address with a written 90-day warranty certificate. Same fault recurs? Fixed free.

Book Free Pickup Now
Verified Customer Reviews

What Customers Say About hp-computer HP Slim Desktop S01 Computer Keyboard/Mouse Not Working in Vasai West

5/5 · 4 Reviews

Real customers · No paid reviews · All verified repairs

Verified
HP EliteDesk 800 G9 — Virus Removal

"My HP EliteDesk 800 G9 was infected with ransomware and running extremely slow. Xigox Versova cleaned all malware, restored encrypted files from shadow copies, and installed proper antivirus. System is clean and fast again."

Xigox Reply: Thank you for your kind review! We strive to provide the best repair experience in Mumbai.
M
Manish Kapoor
📍 Vasai West · Oct 2025
14
Verified
HP Slim Desktop S01 — SSD Speed Upgrade

"Upgraded my aging HP Slim Desktop S01 from HDD to NVMe SSD at Xigox Versova. Boot time dropped from three minutes to eight seconds. Photoshop launches in three seconds. Feels like a brand-new machine. Best upgrade investment."

Xigox Reply: Thank you for choosing Xigox! We value every customer and every repair.
B
Bhagyashree Milind
📍 Vasai West · Jan 2025
4
Verified
HP OMEN 40L — Memory Upgrade

"My HP OMEN 40L struggled with just eight gigs of RAM. Xigox Versova installed thirty-two gigs in dual-channel with XMP enabled. Run Photoshop, Chrome, and Slack simultaneously now without any slowdown. Huge improvement."

Xigox Reply: Thanks for the 5-star review! We look forward to serving you again.
T
Tejas Bhat
📍 Vasai West · Apr 2024
33
Verified
HP Z2 Tower G9 — PC Not Turning On Fix

"My HP Z2 Tower G9 went completely dead after a power surge. Xigox Versova replaced the blown PSU and repaired the front panel wiring. Also installed a surge protector. System boots perfectly with all data intact."

Xigox Reply: Thank you! Your satisfaction is our top priority. See you for any future needs.
N
Nikhil Pandey
📍 Vasai West · Jul 2025
39
See All 44,883+ Reviews 💬 Book Now Like They Did
WATCH & LEARN

Watch How We Handle Laptop & Mobile Repairs

Step-by-step repair videos by our ISO-certified technicians

iPhone Screen Replacement — Full Process
Featured 8:24

iPhone Screen Replacement — Full Process
Laptop Motherboard Repair — Chip Level
12:15

Laptop Motherboard Repair — Chip Level

Expert chip-level motherboard repair on a Dell laptop — diagnosed, repaired and tested same day.
MacBook Battery Replacement — Step by Step
6:47

MacBook Battery Replacement — Step by Step

See our safe, clean MacBook battery replacement process with 90-day warranty.
Samsung Screen Fix — Before & After
5:33

Samsung Screen Fix — Before & After

Samsung Galaxy screen replacement completed in 45 minutes — flawless display quality.

Subscribe on YouTube

Repair tutorials, tips & behind-the-scenes

Follow on Instagram

Before & after shots, reels & stories
FAQs

FAQs — hp-computer HP Slim Desktop S01 Computer Keyboard/Mouse Not Working in Vasai West

Everything you need to know before booking a diagnosis

8 questions answered Verified & updated
Yes — Xigox specialises in Computer Keyboard/Mouse Not Working across Vasai West. Our certified technicians diagnose and fix the problem efficiently, using OEM-quality parts and backed by a 90-day warranty. Free doorstep pickup is available in Vasai West — call or WhatsApp +91 74997 61196. Customers across Vasai West (401202) enjoy priority same-day scheduling.
Ask on WhatsApp Call Now
Most Computer Keyboard/Mouse Not Working issues in Vasai West are resolved the same day — typically within 2–4 hours of pickup. We provide an accurate time estimate during the ₹350 inspection (adjusted vs repair) so you're never left guessing. Customers across Vasai West (401202) enjoy priority same-day scheduling.
Common causes of Computer Keyboard/Mouse Not Working include physical impact, wear and tear, manufacturing defects, water damage, overheating, or software conflicts. Xigox technicians perform a thorough diagnosis to identify the root cause and fix it permanently rather than applying a temporary patch. Customers across Vasai West (401202) enjoy priority same-day scheduling.
Every repair at Xigox — including Computer Keyboard/Mouse Not Working fixes — is covered by a 90-day warranty. If the same problem recurs within 90 days, we repair it free of charge. Our warranty is provided in writing and applies to all repairs across Vasai West and Mumbai MMR. Customers across Vasai West (401202) enjoy priority same-day scheduling.
The cost to fix Computer Keyboard/Mouse Not Working in Vasai West varies by device model and severity. Xigox charges ₹350 for inspection — adjusted against repair cost if you proceed. A transparent written quote before any work begins. You're never charged until you approve the repair — no hidden fees, ever. Customers across Vasai West (401202) enjoy priority same-day scheduling.
Ask on WhatsApp Call Now
Booking is simple: WhatsApp or call +91 74997 61196, describe your device issue, and receive a free quote. Schedule a doorstep pickup at your convenience — we're available 9 AM–9 PM, 7 days a week. No walk-in required.
Ask on WhatsApp Call Now
Yes — every repair at Xigox comes with a 90-day warranty on the repaired component and all parts used. If the same issue returns within 90 days, we fix it free of charge. Warranty terms are provided in writing at the time of repair.
Yes! Xigox provides completely free doorstep device pickup and delivery across Mumbai, Thane, Navi Mumbai, Vasai-Virar, and Palghar. A technician comes to your home or office, collects your device, repairs it, and returns it — no travel needed.

Still have questions?

Our team responds within 15 minutes on WhatsApp. Send us your question and get expert advice instantly.

Ask on WhatsApp Call +91 74997 61196

hp-computer hp-computer HP Slim Desktop S01 Repair in Vasai West — Xigox

Xigox is Vasai West's leading independent specialist for hp-computer hp-computer HP Slim Desktop S01 repair. Our engineers are not generalists — they undergo dedicated training on hp-computer hardware, firmware and diagnostics. Since 2011, we have completed over 1,00,000+ repairs across all hp-computer product lines, earning a 5-star rating from verified customers.

We stock genuine hp-computer parts and OEM-certified components for every common hp-computer HP Slim Desktop S01 fault — from screen replacements and battery swaps to logic board repairs and data recovery. Before any work begins, you receive a written cost estimate. Our ₹350 inspection fee is fully adjusted against the repair cost if you proceed.

We actively serve the entire 401202 postal area within Palghar district, ensuring same-day response for every repair request. ₹350 inspection fee (adjusted against repair cost). Located near Vasai West, our service coverage extends across Vasai West and all surrounding localities. In addition to Vasai West, we also provide doorstep repairs and free pickup for lab work for customers in Manickpur, Vasai Road, Vasai and other nearby areas.

Doorstep part replacement (battery, keyboard, screen, SSD, RAM) is available across Vasai West. For chip-level and motherboard repairs, we provide free pickup and drop — confirming within 15 minutes of your booking. Most common faults are resolved same-day. For complex repairs, we provide a realistic timeline and keep you updated throughout.

Every hp-computer repair at Xigox is covered by a 90-day warranty on all parts and labour. If the same fault recurs within the warranty period, we fix it at no charge. Our after-repair WhatsApp support means we are always available to answer questions about your hp-computer hp-computer HP Slim Desktop S01.

Service Hours
Monday – Sunday · 9 AM – 9 PM
Open on all public holidays
Service Area
Vasai West & surrounding Mumbai areas
Doorstep repairs + free pickup for lab work
Contact Us
+91 74997 61196
info@xigox.com
Our Guarantee
90-day warranty on all repairs
Free re-repair if same fault recurs

Computer Keyboard/Mouse Not Working Repair for Other hp-computer Models

We diagnose and fix Computer Keyboard/Mouse Not Working on all hp-computer models in Vasai West

hp-computer HP EliteDesk 800 G9 hp-computer HP OMEN 40L hp-computer HP ProDesk 400 G9 hp-computer HP Z2 Tower G9

Other hp-computer HP Slim Desktop S01 Problems We Fix

Xigox resolves all common hp-computer HP Slim Desktop S01 hardware and software issues in Vasai West

Computer Audio Issues Computer Beeping On Startup Computer Blue Screen of Death Computer Data Recovery Computer Fan Noisy Computer Graphics Card Issue Computer Hard Drive Failure Computer Monitor Flickering Computer Motherboard Failure Computer Network/Ethernet Issue Computer No Display Computer Not Turning On

Computer Keyboard/Mouse Not Working on Other Brands in Vasai West

We fix Computer Keyboard/Mouse Not Working on all major computer brands — same quality, same warranty

acer-computer apple-computer asus-computer custom-computer dell-computer

Areas, Roads & Landmarks We Cover in Vasai West

Free pickup & drop across all these neighbourhoods

📍 Localities & Neighbourhoods

Vasai Gaon Bhuigaon Stella Suruchi Nagar Manickpur Papdy

⭐ Landmarks & Famous Places

Vasai Fort Killa Bunder

hp-computer HP Slim Desktop S01 Computer Keyboard/Mouse Not Working Repair Near Vasai West

Free doorstep service available in all these nearby areas

Manickpur
2.2 km away
Vasai Road
2.4 km away
Vasai
2.8 km away
Navghar Vasai
3.0 km away
Papdy
3.0 km away
Nala Sopara
3.1 km away
Pelhar
3.2 km away
Sopara
3.4 km away

Computer Keyboard/Mouse Not Working Repair Across Mumbai — All Locations

Achole Sativali Dahanu Road Bhandup Govandi East Vasai Road Halav Pol Boisar MIDC Andheri East BKC Matunga Road Dahanu Road Station Palghar MIDC Papdy Ram Mandir Chandansar Mulund Kelve Beach Ghatkopar Beverly Park Bandra West Bordi GTB Nagar Pali Hill Tembhode Mira Bhayandar Wadi Bunder Jogeshwari West Kherwadi Manpada
Explore More Services

More Repair & Tech Services Near Vasai West

Same certified technicians · Free pickup · 90-day warranty across all services.

₹350 Inspection (Adjusted vs Repair) · 1,00,000+ Repairs · 5 ★ · 90-Day Warranty

Ready to Fix Your
hp-computer HP Slim Desktop S01?

₹350 Inspection (adjusted vs repair) · Expert repair for Computer Keyboard/Mouse Not Working · 90-day warranty

Serving Vasai West and all of Mumbai MMR · Open 9 AM – 9 PM daily

WhatsApp Now — Free Pickup +91 74997 61196

hp-computer HP Slim Desktop S01 Computer Keyboard/Mouse Not Working Repair in Vasai West — Professional, Reliable, and Affordable

Looking for professional hp-computer hp slim desktop s01 computer keyboard/mouse not working repair in Vasai West? Xigox provides certified and experienced technicians who deliver high-quality laptop and computer repair services right at your doorstep. Whether you are a student, working professional, business owner, or home user in Vasai West, our team is equipped to handle all types of laptop and desktop issues quickly and affordably.

Our hp-computer hp slim desktop s01 computer keyboard/mouse not working repair service covers a wide range of common and advanced issues. From simple hardware fixes to complex motherboard-level repairs, data recovery, and performance upgrades, Xigox technicians bring industry-standard tools and genuine replacement parts to every job. We service all major laptop brands including HP, Dell, Lenovo, Asus, Acer, Apple MacBook, MSI, Samsung, and many more.

Why Choose Xigox for hp-computer HP Slim Desktop S01 Computer Keyboard/Mouse Not Working Repair in Vasai West?

Choosing the right repair service matters. At Xigox, we have built our reputation on transparency, quality, and customer satisfaction. Every repair job starts with a thorough diagnosis, followed by a clear cost estimate before any work begins. There are no hidden charges, no surprise fees, and no unnecessary replacements. Our pricing is competitive and honest, starting from just four hundred and ninety-nine rupees for most standard repairs.

We understand that your laptop or computer is essential for work, education, and daily communication. That is why we offer same-day service for most common repairs and a guaranteed turnaround time of two to four hours for standard issues. For residents and businesses in Vasai West, we provide free doorstep pickup and delivery, so you do not need to travel or wait in queues at a service centre.

Our Service Process

Getting your laptop repaired with Xigox is simple and hassle-free. First, contact us via phone call or WhatsApp to describe your issue. Our support team will schedule a convenient pickup time. A trained technician will collect your device from your location in Vasai West, perform a detailed inspection, and share the diagnosis along with a transparent repair quote. Once you approve, the repair is completed using genuine parts, and your device is delivered back to your doorstep with a ninety-day service warranty.

Common hp-computer HP Slim Desktop S01 Computer Keyboard/Mouse Not Working Repair Issues We Fix

Our certified technicians in Vasai West regularly handle a variety of laptop and computer problems. These include screen replacement for cracked or damaged displays, keyboard repair and replacement, battery replacement for devices that no longer hold charge, overheating issues caused by dust buildup or thermal paste degradation, slow performance due to aging hard drives or insufficient RAM, software and operating system reinstallation, virus and malware removal, Wi-Fi and Bluetooth connectivity problems, charging port repair, hinge repair, speaker and audio issues, and motherboard-level component repair.

Serving Vasai West and Nearby Areas

Xigox proudly serves customers across Vasai West and all surrounding neighborhoods and localities. Our technicians are familiar with the area and can reach most locations within Vasai West quickly. Whether you are near the main market area, residential colonies, commercial complexes, or educational institutions in Vasai West, our free pickup and delivery service ensures you get fast and convenient laptop repair without leaving your home or office.

We are available seven days a week from nine in the morning until nine at night. For urgent repairs, our express service option is available with priority handling. Every repair comes with our ninety-day warranty covering both parts and labor. Our commitment is to provide the best hp-computer hp slim desktop s01 computer keyboard/mouse not working repair experience in Vasai West with quality you can trust and prices you can afford.

For immediate assistance with hp-computer hp slim desktop s01 computer keyboard/mouse not working repair in Vasai West, call us at plus ninety-one seven four nine nine seven six one one nine six or send a WhatsApp message for a quick response. Join thousands of satisfied customers across Mumbai who trust Xigox for all their laptop and computer repair needs.

Same-Day Repair Available

Fix Computer Keyboard/Mouse Not Working on hp-computer HP Slim Desktop S01 — Book Now

₹350 inspection fee adjusted vs repair · 90-day warranty

Booking Confirmed!

We'll call you within 1 hour to confirm your appointment and arrange doorstep pickup.

Inspection Fee: ₹350

  • Adjusted in total cost if you proceed with repair
  • Applies if device is not repairable or you decline repair
Message Us on WhatsApp Call +91 74997 61196

+91

Inspection Fee: ₹350

  • If you proceed with the repair, ₹350 will be adjusted in the total repair cost.
  • If the device is not repairable or you decide not to continue, the ₹350 inspection fee will still apply.
Your info is 100% private — never shared

Meet Our Expert Technicians

Certified professionals with years of hands-on experience

Priyank Bhurawalla
MacBook & Chip Level
8 Years experience
Umer Shaikh
Laptop Hardware
5 Years experience
Hapin Makwana
Data Recovery & OS
6 Years experience
Rahul Verma
iPhone & Samsung Chip Level
7 Years experience
ISO
Call WhatsApp