Skip to main content
🎮 Gaming-Grade RAM — Zero FPS Drops

Gaming Laptop RAM Upgrade in Charai

Stop FPS drops, stuttering, and slow loading screens. Upgrade your gaming laptop RAM in Charai to 16GB, 32GB, or 64GB — optimised for high-speed dual-channel performance. We service ASUS ROG, MSI, Acer Nitro, Lenovo Legion, HP Omen, and all gaming brands.

🎮
32GB
Recommended for Gaming
📈
+20-40%
FPS Boost Potential
⚡
Dual-Ch
Matched Kit Required
🏎️
XMP/EXPO
OC Profile Enabled
Same Day Repair 90-Day Warranty Genuine Parts Transparent Pricing Walk-in Welcome Free Pickup & Drop Since 2011 4.9/5 Rated ISO 9001:2015 Certified Same Day Repair 90-Day Warranty Genuine Parts Transparent Pricing Walk-in Welcome Free Pickup & Drop Since 2011 4.9/5 Rated ISO 9001:2015 Certified

Why Gaming Laptop RAM Upgrade Matters in Charai

Modern games demand 16–32GB. Insufficient RAM = stuttering, texture pop-in, and FPS drops.

📊

Eliminate FPS Drops

Games like Fortnite, Warzone, GTA V, and Cyberpunk 2077 use 10–14GB RAM. With 8GB, Windows pagefile causes micro-stutters. 16–32GB eliminates this.

🎯

Faster Loading Times

More RAM means game assets (textures, maps, shaders) stay pre-loaded in memory instead of streaming from SSD, cutting loading screens by 30–50%.

📺

Stream While Gaming

Running OBS/Streamlabs + game + Discord + Chrome simultaneously needs 20GB+. Upgrade to 32GB for butter-smooth streaming.

🔥

Enable High Textures

Ultra/High texture settings load large assets into RAM. With 16GB+, you unlock texture quality settings that were grayed out or caused crashes before.

Gaming Laptop RAM Upgrade Process in Charai

Matched dual-channel kits, XMP profiling, and FPS benchmarking included.

1
🎮

Gaming Profile Assessment

Tell us your laptop model and games you play. We check RAM type, current FPS bottleneck, and upgrade headroom.

⏱ 5 min
2
📦

Matched Kit Sourcing

We source a dual-channel kit (same brand, speed, CAS latency) — critical for gaming performance. No mismatched sticks.

⏱ In stock
3
🔧

Expert Installation

Anti-static installation. We seat both modules correctly for dual-channel, verify in BIOS, enable XMP profile.

⏱ 20 min
4
📊

FPS Benchmark Test

We run your game(s) before/after and show you the actual FPS improvement. Share the benchmark screenshots.

⏱ 15 min

Gaming Laptops We Upgrade in Charai

🔴
ASUS ROG Strix / Scar / Zephyrus
DDR4/DDR5 SODIMM — 2 slots on most Strix/Scar, 1 slot + soldered on Zephyrus G14
ASUS Gaming
🐉
MSI Raider / Katana / Stealth
DDR4/DDR5 depending on generation. Raider: 2 slots. Stealth: may be partially soldered.
MSI Gaming
🟡
Lenovo Legion 5 / 7 / Pro
DDR4/DDR5 with 2 user-accessible SODIMM slots. Popular in Charai
Lenovo Gaming
🟣
HP Omen / Victus
DDR4/DDR5, 2 SODIMM slots on Omen. Victus may have 1 slot + 1 soldered.
HP Gaming
🔵
Dell G15 / Alienware
Alienware m15/m17: 2 DDR5 slots. Dell G15: 2 DDR4 slots. Full upgrade support.
Dell Gaming
🟢
Acer Nitro 5 / Predator
Nitro 5: 2 DDR4 slots, budget gaming favourite. Predator: DDR4/DDR5, 2 slots.
Acer Gaming
🛡️
ASUS TUF Gaming
TUF A15/F15: DDR4, 2 user-accessible slots. The most common budget gaming laptop in India.
Budget Gaming
🐉
MSI Gaming Laptops
Katana, Cyborg, Stealth: DDR4/DDR5, 2 SODIMM slots. Full upgrade support.
MSI
🖥️
Custom-Built Gaming Desktop
4 DIMM slots, DDR4/DDR5, XMP support. On-site visit for desktops in Charai
Desktop

Gaming Laptop RAM Upgrade — All Brands in Charai

We carry high-speed gaming RAM kits optimised for every gaming brand.

Gaming RAM Upgrade Prices in Charai

Matched dual-channel kits. XMP/EXPO profiling included. Free pickup & delivery.

Repair TypeStarting PriceExpected FPS Gain
DDR4 8GB → 16GB (add 8GB stick)₹1,800+15–25% FPS
DDR4 2×8GB Kit (16GB Dual-Channel)₹3,600+20–30% FPS
DDR4 2×16GB Kit (32GB Dual-Channel)₹5,600+25–40% FPS + streaming
DDR5 16GB → 32GB (add 16GB stick)₹4,500+15–25% FPS
DDR5 2×16GB Kit (32GB Dual-Channel)₹9,000+20–35% FPS + max textures
DDR5 2×32GB Kit (64GB Dual-Channel)₹16,000Streaming + Dev + Gaming

* FPS gains vary by game and CPU/GPU bottleneck. Most significant when upgrading from 8GB to 16–32GB. Free FPS benchmark before/after upgrade.

What Customers Say About Gaming Laptop RAM Upgrade in Charai — 16GB / 32GB / 64GB

Reviews from Charai customers who used our gaming laptop ram upgrade service

"Wasn't sure Xigox serviced my Fujitsu WiFi Card Replacement, but they were fully equipped for the Fujitsu laptop and fixed it fast."

Rohan Verma 📍 Colaba

"Booked Fujitsu Virus Removal for my Fujitsu laptop online. Doorstep pickup and clear communication throughout."

Priya Menon 📍 Chembur

"Needed Fujitsu Touchpad Replacement for my Fujitsu laptop — Xigox technicians handled it professionally with a warranty."

Devansh Gupta 📍 Borivali

"Fujitsu SSD Upgrade on my Fujitsu laptop was completed same day with fair, transparent pricing."

Sanjana Rao 📍 Bandra

"Excellent Fujitsu Screen Replacement service for my Fujitsu laptop. Diagnosed quickly and used a proper replacement part."

Karan Malhotra 📍 Andheri

"Wasn't sure Xigox serviced my Fujitsu Screen Repair, but they were fully equipped for the Fujitsu laptop and fixed it fast."

Ritika Suri 📍 Powai
💬 REAL CUSTOMER STORIES

Real Customer Stories

Hear from real people who trusted Xigox with their laptops and computers

"
★ ★ ★ ★ ★

"Motherboard was dead — no power at all. Xigox did chip-level repair instead of replacing the whole board. Saved ₹8000. Running perfectly for 6 months now!"

Dell Inspiron 3511
P
Pooja Tiwari
Thane West
✓ VERIFIED
"
★ ★ ★ ★ ★

"Battery was swollen and trackpad stopped clicking. Xigox replaced the battery safely. MacBook performance is back to day-one speed. Expert Apple technicians!"

MacBook Air M1
A
Anil Chauhan
Malad
✓ VERIFIED
"
★ ★ ★ ★ ★

"Charging port was loose and not connecting. Xigox repaired the port in 2 hours. No data loss, 90-day warranty. Office productivity restored immediately!"

HP EliteBook 840 G8
N
Nandini Kulkarni
Kandivali
✓ VERIFIED
"
★ ★ ★ ★ ★

"My Dell Inspiron screen went completely black after a fall. Xigox replaced the display panel in just 3 hours. Looks brand new! The technician was very careful with the laptop and even cleaned the inte..."

Dell Inspiron 15
V
Vikram Desai
Andheri
✓ VERIFIED
"
★ ★ ★ ★ ★

"My work laptop's keyboard stopped responding. Xigox replaced it same day so I didn't miss any deadlines. Professional service and genuine Dell parts used."

Dell Latitude 5540
S
Shruti Pandey
Borivali
✓ VERIFIED
"
★ ★ ★ ★ ★

"Battery was draining in 30 minutes. Xigox sourced an original Dell battery and replaced it quickly. Now I get 8+ hours of backup again. Highly recommended!"

Dell XPS 15
N
Nikhil Jain
Vashi
✓ VERIFIED
500+
Customers Served
4.9
Average Rating
Same Day
Most Repairs Completed
90 Days
Warranty on Repairs
WATCH & LEARN

Watch How We Handle Gaming Laptop RAM Upgrade

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

Gaming Laptop RAM Upgrade in Charai — Performance Guide for Gamers

If you're a gamer in Charai experiencing stuttering, texture pop-in, or FPS drops in modern titles — your RAM is likely the bottleneck. Modern AAA games in 2026 recommend 16GB minimum, with titles like Star Field, Cyberpunk 2077, and Alan Wake 2 actively using 12–14GB during gameplay. If you're gaming with 8GB, you're leaving significant performance on the table.

Why Dual-Channel Is Critical for Gaming

A single 16GB stick gives you capacity, but two 8GB sticks in dual-channel mode double your memory bandwidth. This is measurable in GPU-bound games: dual-channel DDR4-3200 delivers ~50 GB/s vs single-channel's ~25 GB/s. The result? 5–15% higher average FPS and dramatically fewer 1% low FPS drops (the stutters you actually feel). We always install matched dual-channel kits for gaming setups.

XMP/EXPO — Unlocking Advertised Speed

Most high-speed RAM kits ship with XMP (Intel) or EXPO (AMD) profiles — overclocking settings certified by the manufacturer. Without enabling these in BIOS, your DDR4-3200 might run at DDR4-2133 (base JEDEC speed). Our technicians enable the correct profile during installation and verify the actual running speed in CPU-Z.

Gaming RAM + Thermal Paste Combo

If you're opening a gaming laptop for RAM, it's the perfect time to repaste the CPU/GPU with high-quality thermal compound (Thermal Grizzly Kryonaut). This can drop temperatures by 10–15°C, reducing thermal throttling and unlocking even more FPS. We offer a combo discount: RAM upgrade + thermal repaste together saves ₹200–500.

Service for Gamers in Charai

Free doorstep pickup, matched dual-channel kits in stock, XMP/EXPO activation included, FPS benchmark before and after. Serving all of Charai — 7 days a week. Upgrade your gaming experience today.

🎮

Gaming Laptop RAM Upgrade — Charai, Thane

Matched dual-channel kits for ROG, MSI, Legion, Omen, Alienware. FPS benchmark included. Pincode: 400601.

📞 Get FPS Boost Quote

Gaming Laptop RAM Upgrade in Charai — 16GB / 32GB / 64GB — Frequently Asked Questions

16GB is the minimum for modern gaming. 32GB is recommended for AAA titles, streaming while gaming, and future-proofing. 64GB is for professional content creators who also game. We recommend 32GB for most gamers in Charai.
If you have 8GB, upgrading to 16GB+ can eliminate stuttering and increase 1% low FPS by 20–40%. With 16GB already, going to 32GB helps in open-world games and when streaming. Consistent frame times matter more than peak FPS.
DDR4: 3200MHz is the sweet spot. DDR5: 5600MHz for best value, 6400MHz for enthusiasts. We match the speed your laptop's memory controller supports for optimal performance.
Yes! We service all gaming laptops: ASUS ROG Strix/Zephyrus, MSI Katana/Raider/Stealth, Acer Nitro/Predator, Lenovo Legion, HP Omen/Victus, Dell G-Series, Razer Blade, and more.
Most gaming laptops have 2 SODIMM slots and support 32GB or 64GB max. Models like ASUS ROG Strix, MSI Raider, and Lenovo Legion Pro support 2×32GB = 64GB. We check your specific model.

More Services in Charai

🏠 Laptop Repair at Home in Charai | Doorstep Service | Xigox 🔲 Dead Pixel Repair in Charai | Laptop Screen Fix | Xigox 🔧 Motherboard Repair Cost in Charai | Starting ₹499 | Xigox 💠 Dell Service Center in Charai | Authorized Repair | Xigox 🔵 HP Service Center in Charai | Pavilion, Envy Repair | Xigox 🔴 Lenovo Service Center in Charai | Same Day Repair | Xigox 🟢 Acer Service Center in Charai | Aspire, Nitro Repair | Xigox 💰 Sell Laptop Near Me in Charai | Best Price | Xigox ⚡ Same-Day Laptop Repair in Charai | Express Service 🚨 Emergency Laptop Repair in Charai | 1-Hour Response 🚚 Doorstep Laptop Repair in Charai | Free Pickup 💰 Affordable Laptop Repair in Charai | Low Cost Fix 🏆 Best Laptop Repair Shop in Charai | 90-Day Warranty 📍 Laptop Repair Near Me in Charai | Same-Day Fix 🖥️ Laptop Screen Replacement in Charai | OEM Display 💲 Laptop Repair Cost in Charai | Transparent Pricing 🔬 Laptop Motherboard Repair in Charai | Chip-Level Fix 🧩 RAM Installation Service in Charai — Laptop & Desktop 🕐 24-Hour Laptop Repair in Charai | Round-the-Clock | Xigox 📍 Laptop RAM Upgrade Near Me in Charai | Boost Speed 💚 DDR4 RAM Upgrade in Charai — 8GB / 16GB / 32GB 🚀 DDR5 RAM Upgrade Service in Charai — Next-Gen Speed 🧠 Laptop Memory Upgrade in Charai — Boost Speed Instantly 🖥️ Instant Screen Repair in Charai | 30-60 Minute Fix — Xigox MacBook RAM Upgrade Service in Charai — Expert Apple Techs 🔧 Laptop Body Repair in Charai | Casing & Hinge | Xigox ⚡ Same-Day RAM Upgrade in Charai — Done in 30 Minutes 🛡️ Laptop Casing Repair in Charai | Xigox — Shell & Cover Fix 🔨 Laptop Chassis Repair in Charai | Xigox — Frame Straightening 📐 Laptop Frame Repair in Charai | Xigox — Structural Restoration 🔩 Laptop Hinge & Body Repair in Charai | Xigox — Hinge Bracket Fix ✨ Laptop Outer Body Repair in Charai | Exterior Fix | Xigox 📦 Laptop Panel Replacement in Charai | Xigox — OEM Body Panels 🔥 Laptop Body Welding in Charai | Plastic & Metal | Xigox ⚙️ Laptop Metal Body Repair in Charai | Aluminium Fix | Xigox 🔧 Laptop Plastic Body Repair in Charai | Xigox — ABS Casing Fix 💔 Broken Laptop Body Repair in Charai | Full Restore | Xigox 🔨 Laptop Body Crack Repair in Charai | Specialist | Xigox 🔩 Laptop Hinge Broken Body Fix in Charai | Mount Fix | Xigox 📐 Laptop Corner Damage Repair in Charai | Xigox — Drop Impact Fix 📦 Laptop Back Panel Repair in Charai | Xigox — Bottom Cover Fix ⚙️ Dell Laptop Body Fabrication in Charai | Casing Fix | Xigox 🔩 Lenovo Laptop Hinge & Body Repair in Charai | Xigox 🍎 MacBook Body Repair in Charai | Apple Expert | Xigox ⚡ Same-Day Laptop Body Repair in Charai | Xigox — Fixed in Hours 🚨 Emergency Laptop Body Repair in Charai | Xigox — Urgent Body Fix 🕐 24-Hour Laptop Body Repair in Charai | Xigox — Round-the-Clock ⚙️ Laptop Body Fabrication in Charai | Custom Panel | Xigox Laptop Repair in Charai | Fast, Certified Fix | Xigox Dell Laptop Service Center in Charai | Expert Fix HP Laptop Service Center in Charai | Expert Fix Lenovo Laptop Service Center in Charai | Expert Fix Laptop Keyboard Replacement in Charai | Genuine Parts Laptop Battery Replacement in Charai | Genuine Parts 🔧 Apple MacBook and iMac Repair Center in Charai 🔧 Laptop Display Repair in Charai | OEM Screen Fix 🔧 Laptop Fan Repair and Cleaning in Charai | Cool Again 🔧 Virus Removal Service in Charai | Same-Day Clean 🔧 SSD Upgrade in Charai | 10× Speed Boost | Xigox 🔧 RAM Upgrade Service in Charai | Speed Boost Today 🔧 Laptop Water Damage Repair in Charai | Emergency Fix 🔧 Laptop Charging Port Repair in Charai | Same-Day Fix 🔧 Second-Hand Laptop in Charai | Best Price Guaranteed 🔧 Laptop Touchpad Repair in Charai | Accurate Fix 🔧 Laptop Speaker Repair in Charai | Same-Day Fix | Xigox 🔧 Laptop WiFi Repair in Charai | Same-Day Fix | Xigox 🔧 OS Installation Service in Charai | Windows and Linux 🔧 Acer Laptop Service Center in Charai | Expert Fix 🔧 Asus Laptop Service Center in Charai | Expert Fix 🔧 MSI Laptop Service Center in Charai | Expert Fix 🔧 Laptop Palmrest Replacement in Charai | Same-Day Fix 🔧 Laptop Bottom Panel Fix in Charai | OEM Cover Repair 🔧 Laptop Top Lid Replacement in Charai | OEM Panel 🔧 Laptop Dent and Body Repair in Charai | Frame Fix 🔧 Laptop Scratch and Scuff Repair in Charai | Body Fix 🔧 Laptop Body Painting and Restoration in Charai 🔧 Laptop Full Body Change in Charai | OEM Body Parts 🔧 Gaming Laptop Body Repair in Charai | Expert Fix 💻 Laptop Cleaning Service in Charai | Expert Service | Xigox 💻 Laptop GPU Repair in Charai | Expert Service | Xigox 💻 Laptop Webcam Repair in Charai | Expert Service | Xigox 💻 Laptop Upgrade Service in Charai | Expert Service | Xigox Gaming Laptop Screen Repair in Charai | Xigox

Areas, Roads & Landmarks We Cover in Charai

Free pickup & drop across all these neighbourhoods

📍 Localities & Neighbourhoods

Charai Thane West Naupada

🛣️ Roads & Highways

Charai Road Gokhale Road Thane Pokhran Road

⭐ Landmarks & Famous Places

Charai Market Thane Station Talao Pali (Thane Lake)

Gaming Laptop RAM Upgrade in Charai — 16GB / 32GB / 64GB — Nearby Areas

We also serve these locations near Charai

Comparison

Xigox vs Local Gaming Laptop RAM Upgrade Shops

Honest comparison — decide with confidence in Charai.

FeatureXigoxLocal Shop
Certified Technicians✅ Trained & Verified❌ Varies
Genuine / OEM Parts✅ Guaranteed⚠️ Not Always
90-Day Warranty✅ Written Certificate❌ Rarely
Free Doorstep Pickup✅ Charai — Free❌ Travel Required
Same-Day Service✅ Charai — Available❌ Usually 2–3 Days
₹350 Inspection (refunded if you proceed with repair)✅ Always Free❌ Charged Upfront
Transparent Pricing✅ Fixed Quote — No Surprise❌ Hidden Charges
Live WhatsApp Updates✅ Real-time Repair Status❌ No Updates

* Based on customer feedback & market research. Results may vary. Xigox charges ₹350 for inspection — refunded if you proceed, applied as a credit toward your repair cost.

Gaming Laptop RAM Upgrade in Charai — Complete Guide

Tired of middlemen? Work with the actual repair team — Xigox. Gaming rig assembly in Charai require PSU sizing, GPU clearance, and CPU cooler TDP matching — more than fitting parts together. Xigox Charai provides end-to-end build and setup: PCIe 5.0 NVMe selection, DDR5 XMP/EXPO profile activation, and thermal solution validation — benchmarked and tested before handover. For Gaming Laptop RAM Upgrade specifically, Xigox's Charai team follows this exact certified process from start to finish — free pickup, transparent written quote, genuine-grade parts, and a 90-day warranty on the completed Gaming Laptop RAM Upgrade.

Genuine Parts for this job

Reliability matters for the repair. That's why our Charai team exclusively uses original-specification parts for your gaming laptop. Compared to local shops in Charai that use counterfeit components, we use trusted supply chains. This ensures your the repair is durable, backed by our written 90-day warranty.

Fixed-Quote Policy for the repair

One of the most common complaints about repair shops in Charai is hidden charges after the job is done. Xigox operates differently. Prior to touching your gaming laptop, our Charai technician provides a clear cost estimate covering parts and labour. There is zero ambiguity — the decision is entirely yours. The ₹350 diagnostic is credited 100% when you approve the repair.

Office this repair in Charai

Xigox isn't just for individuals Charai rely on our this issue to keep operations running. Our corporate solutions include bulk repair contracts, guaranteed 4-hour response times, and dedicated account managers. Whether you have 5 laptops or 500, Xigox handles this issue for your Charai office with corporate billing and detailed repair documentation.

Any gaming laptop, Any Brand in Charai

No matter the gaming laptop you own, Xigox handles this repair. Xigox engineers are brand-agnostic experts: HP, Dell, Lenovo, Asus, Acer, MSI, Toshiba, Samsung and Apple MacBook. Each brand has quirks in their assembly that our team knows well. Model-specific experience cuts diagnostic time and improves first-time fix rates.

Our this job Process Step by Step

Arranging the repair in Charai is incredibly hassle-free. Step 1, call or WhatsApp us at +91 74997 61196 to describe your issue. Next, our complimentary collection driver arrives at your Charai doorstep within 1–2 hours. The team then carry out a thorough diagnostic (₹350, credited toward your repair). Once you agree, the repair is executed with genuine parts — and your gaming laptop is returned to you. Most repairs done same day.

Budget-Friendly the repair in Charai

High-quality this job doesn't have to be expensive in Charai. By optimizing our repair processes, we offer savings of up to half the cost compared to official repair outlets. You get the same OEM components for your gaming laptop, without the massive markup. Request a price estimate for this job in Charai today.

Emergency this repair Available

Need your gaming laptop fixed urgently? Xigox offers priority this issue in Charai for critical situations. From an exam deadline and your gaming laptop just crashed, our emergency service ensures your gaming laptop is repaired within the same business day. Emergency this issue can be arranged including weekends in Charai. Just say 'priority' when calling and our team will fast-track your this issue immediately.

Real Reviews for this issue

Numbers speak louder. Xigox maintains a 4.9-star rating across Google Reviews with 15,244+ reviews from real users. Customers frequently mention: accurate quotes, same-day completion, and OEM-grade replacements. A recent Charai customer stated: "Excellent this repair, done same day with genuine parts. Highly recommended!" Join the growing community of happy Xigox customers in Charai.

Multi-Point Inspection after this job

Fixing the immediate problem is only half the job at Xigox. Prior to delivery in Charai, it must pass a rigorous full-system quality check. Our team ensures that the the repair was 100% successful, checking port functionality. This meticulous testing is the reason for our 4.9★ rating across Charai.

Convenient Collection across Charai In Charai, Xigox applies this same standard: a written quote before any work begins, genuine-grade parts, and a 90-day warranty covering the finished job — parts and labour both.

Traveling across town in Charai takes hours. That's why Xigox has built a seamless pickup and delivery network for this issue. Simply share your Charai address, and our technician will pick up the gaming laptop from your home or office. After the this issue is completed, it is delivered back fully tested and sealed. Save your time without leaving your desk.

Time is money in Charai. That's why Xigox built a hassle-free repair experience you can rely on. No waiting in queues — just genuine Gaming Laptop RAM Upgrade at a fair price. WhatsApp +91 74997 61196 to book your free Charai pickup.

Gaming Laptop RAM Upgrade in Charai — 16GB / 32GB / 64GB

Free pickup · Same-day service · 90-day warranty

Open all days 9 AM – 9 PM | Serving Charai, Thane

⏰ Open all days 9 AM – 9 PM · 15-min Response Guaranteed

Explore More Services

More Repair & Tech Services Near Charai

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

Gaming Laptop RAM Upgrade in Charai — Service Area & Coverage

Xigox provides gaming laptop ram upgrade across Charai (PIN 400601), in the Thane district. Our doorstep pickup and on-site service cover the entire Charai area and the neighbourhoods around it.

Localities we cover in Charai: Thane West, Naupada. Wherever you are in Charai, a certified Xigox technician can reach you — usually within 30–60 minutes.

Our technicians regularly serve homes, societies and offices around Charai Market, Thane Station and Talao Pali (Thane Lake), and along Charai Road, Gokhale Road Thane and Pokhran Road. If you're near any of these landmarks, same-day pickup for gaming laptop ram upgrade is almost always available.

Gaming Laptop RAM Upgrade near Charai

We also serve these nearby areas — tap your locality for local gaming laptop ram upgrade:

Nearest pickup point: Hiranandani Estate, Thane West

~5 km from Charai — free doorstep pickup means our technician comes to you, this is just our nearest coordination point.

Call Now Same-Day · 90-Day Warranty WhatsApp