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                            | Nokia Lumia 635 | Realme 15 | 
| Build | |
|---|---|
| OS | |
| Microsoft Windows Phone 8.1 | Android 15 OS | 
| UI | |
| Realme UI 6.0 | |
| Dimensions | |
| 129.5 x 66.7 x 9.2 mm | 163.34 x 75.88 x 7.66mm | 
| Weight | |
| 134 g | 185 g | 
| SIM | |
| Dual-SIM | Nano-SIM + Nano-SIM | 
| Colors | |
| Bright Orange, bright green, bright yellow, white, black | Silk Pink, Suit Titanium | 
| Network | |
|---|---|
| 2G Band | |
| GSM: 850 / 900 / 1800 / 1900 | SIM1: GSM 850 / 900 / 1800 / 1900 SIM2: GSM 850 / 900 / 1800 / 1900 | 
| 3G | |
| Yes | Yes | 
| 4G | |
| Yes | Yes | 
| 5G | |
| No | Yes | 
| Processor | |
|---|---|
| CPU | |
| 1.2 GHz Quad-core Cortex-A7 | 2.5 Ghz Octa Core | 
| Chipset | |
| Qualcomm Snapdragon 400 | Mediatek Dimensity 7300+ 5G (4 nm) | 
| GPU | |
| Adreno 305 | Mali-G615 MC2 | 
| Display | |
|---|---|
| Technology | |
| 16M colors, IPS LCD capacitive touchscreen, Multitouch | AMOLED Capacitive Touchscreen | 
| Size | |
| 4.5 inches | 6.77 Inches | 
| Resolution | |
| 480 x 854 pixels (~218 ppi pixel density) | 1080 x 2392 Pixels (~388 PPI) | 
| Protection | |
| Corning Gorilla Glass 3 | |
| Extra Features | |
| ClearBlack display | 144Hz, 1600nit (HBM), 4500nit Peak Brightness | 
| Memory | |
|---|---|
| Built-in | |
| 8GB built-in, 512MB RAM | 512GB Built-in, 12GB RAM (+14GB Dynamic RAM), UFS 3.1 | 
| External Card | |
| microSD card (supports up to 128GB) | No | 
| Camera | |
|---|---|
| Main | |
| 5 MP, 2592 x 1936 pixels, autofocus | Dual Camera: 50 MP, f/1.8, 24mm (wide), 1/1.56", PDAF, OIS + 8 MP, f/2.2, 16mm (ultrawide), LED Flash | 
| Features | |
| 1/4'' sensor size, Geo-tagging, panorama, Video (720p@30fps) | HDR, Panorama, Video (4K@30fps, 1080p@30fps, gyro-EIS, OIS) | 
| Front | |
| No | 50 MP, f/2.4, 23mm (wide), Panorama, Video (4K@30fps, 1080p@30fps) | 
| Connectivity | |
|---|---|
| WLAN | |
| Wi-Fi 802.11 b/g/n, DLNA, Wi-Fi hotspot | Wi-Fi 802.11 a/b/g/n/ac/6, dual-band | 
| Bluetooth | |
| v4.0 with A2DP | v5.4 with A2DP, LE | 
| GPS | |
| Yes + A-GPS support & Glonass | Yes + A-GPS support & Glonass, BDS | 
| Radio | |
| FM radio | |
| USB | |
| microUSB v2.0 | USB Type-C 2.0 | 
| Data | |
| GPRS, EDGE, 3G (HSDPA, 21 Mbps; HSUPA, 5.76 Mbps), 4G (LTE, Cat3, 50 Mbps UL, 100 Mbps DL) | 2G GSM, 3G HSPA, 4G LTE, 5G Capable | 
| Sensors | |
|---|---|
| Accelerometer | |
| Yes | Yes | 
| Gyro | |
| No | Yes | 
| Compass | |
| No | Yes | 
| Proximity | |
| Yes | Yes | 
| FingerPrint | |
| No | Yes | 
| Features | |
|---|---|
| Audio | |
| 3.5mm audio jack, Speakerphone | 3.5mm Audio Jack, Dual Speaker | 
| Browser | |
| HTML5 | HTML5 | 
| Messaging | |
| SMS (threaded view), MMS, Email, Push Email, IM | SMS(threaded view), MMS, Email, Push Mail, IM | 
| Games | |
| built-in | Built-in + Downloadable | 
| Battery | |
|---|---|
| Capacity | |
| 1830 mAh | Li-ion 7000 mAh | 
| Standby | |
| up to 684hrs | |
| Talktime | |
| up to 12hrs | |
| Musicplay | |
| up to 58hrs | |
| Features | |
| Fast battery 80W wired, 50% in 25 min | |
| Price | |
|---|---|
| Price in Rs. | |
| Discontinued | Rs. 119,999 PKR | 
| Price in USD | |
| Discontinued | $416.66 USD |