Samsung Galaxy Win Pro Duos is a samsung device (codename: sm-g3812). FirmwareMirror hosts 1 verified firmware builds, covering: CHU. Available as official firmware. Last updated: 2026. All files MD5-verified. Free, no registration.
Find and download official Stock ROM for Samsung Galaxy Win Pro Duos (sm-g3812). All firmware files include MD5 hash verification and are available for direct download.
| Version | Method | Size | Release Date | MD5 Hash | Download |
|---|---|---|---|---|---|
| G3812ZNUAOH1/G3812CHUAOH1/G3812ZNUAOH1 | Odin | 313.16 MB | N/A |
N/A
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Download |
Also known as Samsung Galaxy Express 2 G3815, Samsung Galaxy Express II
| Network | Technology | GSM / HSPA / LTE |
|---|---|---|
| 2G bands | GSM 850 / 900 / 1800 / 1900 | |
| 3G bands | HSDPA 850 / 900 / 2100 | |
| 4G bands | 3, 7, 8, 20 | |
| Speed | HSPA 42.2/5.76 Mbps, LTE Cat3 100/50 Mbps |
| Launch | Announced | 2013, October. Released 2013, October |
|---|---|---|
| Status | Discontinued |
| Body | Dimensions | 132.4 x 65.7 x 9.8 mm (5.21 x 2.59 x 0.39 in) |
|---|---|---|
| Weight | 134.2 g (4.73 oz) | |
| SIM | Micro-SIM |
| Display | Type | TFT |
|---|---|---|
| Size | 4.5 inches, 55.8 cm2 (~64.2% screen-to-body ratio) | |
| Resolution | 540 x 960 pixels, 16:9 ratio (~245 ppi density) |
| Platform | OS | Android 4.2.2 (Jelly Bean) |
|---|---|---|
| Chipset | Qualcomm Snapdragon S4 | |
| CPU | Dual-core 1.7 GHz Krait | |
| GPU | Adreno 305 |
| Memory | Card slot | microSDXC (dedicated slot) |
|---|---|---|
| Internal | 8GB 1.5GB RAM |
| Main Camera | Single | 5 MP, AF |
|---|---|---|
| Features | LED flash | |
| Video | Yes |
| Selfie camera | Single | VGA |
|---|---|---|
| Video |
| Sound | Loudspeaker | Yes |
|---|---|---|
| 3.5mm jack | Yes |
| Comms | WLAN | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, DLNA, hotspot |
|---|---|---|
| Bluetooth | 4.0, A2DP, EDR | |
| Positioning | GPS, GLONASS | |
| NFC | Yes | |
| Radio | Stereo FM radio, RDS, recording | |
| USB | microUSB 2.0 |
| Features | Sensors | Accelerometer, gyro, proximity, compass |
|---|
| Battery | Type | Li-Ion 2100 mAh, removable |
|---|---|---|
| Stand-by | Up to 480 h (3G) | |
| Talk time | Up to 11 h (3G) |
| Misc | Colors | Blue, White |
|---|---|---|
| Models | SM-G3815 | |
| SAR | 0.38 W/kg (head) 0.70 W/kg (body) | |
| SAR EU | 0.38 W/kg (head) 0.36 W/kg (body) | |
| Price | About 210 EUR |
A: Yes — official firmware from the manufacturer is generally safe when you match your device's exact model number and region. Flashing the wrong region or modified firmware can cause issues.
A: Samsung Galaxy Win Pro Duos firmware is flashed using Odin. See the step-by-step guide above for the full procedure.
A: Some devices allow downgrading, others have anti-rollback protection that blocks it. Check the version-specific notes on each ROM page, or your model's community forum, before attempting a downgrade.
A: First, verify the firmware matches your exact model code (e.g. SM-S938B for Samsung, or the CPH-number for OPPO). Reinstall the manufacturer's USB drivers, use a rear USB 2.0 port directly on your PC, and retry. The troubleshooting box above the FAQ covers the most common failure modes.
