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General
| Name | Microsoft Lumia 640 Dual SIM | Samsung Galaxy S Blaze 4G T769 |
|---|---|---|
| Launch Date | 1 Mar 2015 | 1 Jan 2012 |
| Brand | Microsoft | Samsung |
| Colors | Glossy cyan, Orange, White, Matte black | - |
Display
| Display Size | 5.0 Inches | 3.97 Inches |
|---|---|---|
| Display Type | IPS LCD | AMOLED |
| Resolution | 720 x 1280 pixels | 480 x 800 pixels |
| Refresh Rate | 60Hz | 60Hz |
| Display Protection | Gorilla Glass 3 | - |
| Aspect Ratio | 16:9 | 5:3 |
| Features | 67.6% (screen to body ratio), 294 ppi | - |
Platform
| Operating System | Microsoft Windows Phone 8.1, upgradable to Microsoft Windows 10 | Android 2.3.6 (Gingerbread) |
|---|---|---|
| Processor | Snapdragon 400 (28 nm) | Snapdragon S3 |
| CPU | Quad-core 1.2 GHz Cortex-A7 | - |
| GPU | Adreno 305 | - |
Memory
| Ram | 1GB | 1GB |
|---|---|---|
| Storage | 8GB | 3GB |
| Storage Type | eMMC 4.5 | - |
| SD Card Slot | Yes | Yes |
Camera
| Type | Single Camera | Single Camera |
|---|---|---|
| Main | 8 MP, f/2.2, 28mm, 1/4.0", AF | 5 MP, AF |
| Video | 1080p@30fps | 720p@30fps |
Front Camera
| Type | Single Camera | Single Camera |
|---|---|---|
| Selfie | 1 MP | 1.3 MP |
| Video | 720p | - |
Battery
| Capacity | 2500 mAh | 1750 mAh |
|---|---|---|
| Battery Technology | Li-Ion, removable | Li-Ion |
| Charging Speed | - | - |
| USB Type | Micro USB, USB 2.0 | Micro USB |
| Wireless Charging | No | No |
Network
| Sim | Dual Sim | Single Sim |
|---|---|---|
| Sim Type | Dual SIM (Micro-SIM, dual stand-by) | |
| Technology | 3G | 3G |
Connectivity
| Wi-Fi | WiFi 2.4 | WiFi 2.4 |
|---|---|---|
| Bluetooth | V4.0 | V3.0 |
| NFC | No | Yes |
| GPS | Yes | Yes |
Audio
| Loudspeaker | Yes | Yes |
|---|---|---|
| Headphone Jack | Yes | Yes |
Biometric
| Fingerprint | No | No |
|---|---|---|
| Face Unlock | Not Available | Not Available |
Body
| Dimensions | 141.3 x 72.2 x 8.8 mm | 121.9 x 63 x 11.2 mm |
|---|---|---|
| Weight | 145 g | 127.6 g |
| Frame | Plastic Frame | - |
| Back | Plastic Back | - |
| IP Rating | No | No |
Others
| Sensors | Accelerometer, proximity, compass | - |
|---|
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