Given the high stakes—especially the risk of permanently losing IMEI or hard-bricking the device—the most helpful advice for most users is do not attempt this yourself unless you are technically confident. Instead:
Before downloading any ROM, you must identify your processor. The Indian/Chinese version of the Oppo F1s uses a Qualcomm Snapdragon 425 (MSM8917). Flashing Snapdragon firmware on an MT6755 device (or vice versa) will hard-brick your phone permanently.
How to verify your chipset:
The correct Oppo F1s MT6755 Firmware is designed specifically for the A1601 global edition. It manages everything from camera drivers to battery optimization and network radios (GSM/LTE). Oppo F1s Mt6755 Firmware
Beware of scam sites promising "Oppo F1s MT6755 Firmware" for free. Many contain malware or modified preloaders. Below are trustworthy sources:
| Source | Reliability | File Type | Notes | |--------|-------------|-----------|-------| | Oppo Official Support | High | OTA ZIP | Rarely offers full ROMs. Usually incremental updates. | | NeedROM | Medium | Scatter + Preloader | User-uploaded; check comments for authenticity. | | GSM Hosting / GSMMafia | Medium | SP Flash Tool files | Large repository; verify SHA-1 hashes. | | XDA Developers Forums | Highest | Verified by community | The safest place for MT6755 files. |
Key identifiers for authentic firmware:
This is not a process for the casual user. Common risks include:
The Oppo F1s (marketed as the "Selfie Expert") exists in two major hardware versions:
⚠️ Crucial Warning: Flashing MT6755 firmware onto a Snapdragon unit (or vice versa) will hard-brick the device. Always verify your chipset via CPU-Z or by checking the PCB silkscreen after removing the back cover. Given the high stakes—especially the risk of permanently
Q: Can I flash Qualcomm firmware on MT6755 device?
A: Absolutely not. The pinouts, bootloaders, and partition tables are incompatible. The phone will never power on again.
Q: My phone has "OPPO F1s 32GB" but I see MT6755 – is that correct?
A: Yes. The 32GB/3GB RAM variant globally used MT6755. The 64GB/4GB "Splash" edition also used MT6755.
Q: Does this firmware support Android 7.0+?
A: No. Oppo never released an official Nougat or later version for the MT6755 F1s. The last official build is Android 6.0.1 with ColorOS 3.0. The correct Oppo F1s MT6755 Firmware is designed
Q: My flash fails at "PMT changed for the ROM".
A: Go to SP Flash Tool → Options → "Download" tab → Check "Format whole flash except bootloader" – but only if you have full backup. Otherwise, use "Format All + Download" as last resort.
| Error | Solution | |-------|----------| | S_BROM_CMD_FAIL (0x7D4) | Reconnect battery (open phone) or use different SPFT version. | | Status_DA_Hash_Mismatch | Use newer SP Flash Tool (v5.20+). | | DRAM error | Wrong scatter file or corrupted preloader. | | Device not detected | Install VCOM drivers; try shorting test points (last resort). | | Authentication error | Some MT6755 have secure boot; need authorized DA file (search for “MT6755 DA”). |