Oppo F1s Mt6755 | Firmware [2021]

⚠️ Critical Warning:
The Oppo F1s has two variants:

MT6755 (MediaTek – this guide)

Qualcomm MSM8953 (different firmware – do NOT use this guide)

Check your variant via Settings → About Phone → Baseband version or use CPU-Z. If you flash the wrong firmware, you will hard-brick the device. Oppo F1s Mt6755 Firmware

Safe Source #2: MTK Firmware Repositories

Trusted developer forums host verified files. Look for: ⚠️ Critical Warning: The Oppo F1s has two variants :

File name pattern: A1601_MT6755_11_A.14_170119.rar
Build number: Starts with A1601_11_ (Specifically MT6755 branch)
MD5 Checksum: Always provided by trustworthy uploaders.

The Right Tools for the Job

Flashing firmware on a MediaTek device requires specific software, not the Samsung Odin or Qualcomm QFIL tools. For the Oppo F1s MT6755, the standard toolkit includes: MT6755 (MediaTek – this guide) Qualcomm MSM8953 (different

SP Flash Tool (Smart Phone Flash Tool): The industry standard for MediaTek chipsets. It bypasses the phone’s software to write directly to the memory chip.
MTK USB Drivers: Essential for your Windows PC to recognize the phone in pre-boot mode (MediaTek PreLoader or BROM mode).
Scatter File: A text file that maps the firmware partitions (boot, system, recovery, userdata) onto the phone’s memory. This must match the MT6755 exactly.
Original Stock Firmware (.ofp or extracted .img files): The safest source is Oppo’s official support site or reputable firmware archives. Avoid random "custom ROMs" unless you trust the developer.

Part 6: Post-Flashing Steps – Fixing IMEI and Network Issues

After flashing the Oppo F1s MT6755 firmware, you may lose your IMEI numbers (leading to "No Service").

Legal and Warranty Implications

Flashing Oppo F1s MT6755 Firmware from third-party sources voids any remaining warranty (though unlikely on a 2016 device). Oppo’s official stance is clear: only service centers should flash firmware. However, since Oppo no longer provides updates for the F1s, community flashing is widely accepted as a last resort.

Step 1: Install Drivers and SP Flash Tool

Disable Windows Driver Signature Enforcement (reboot PC, press F8, select "Disable...")
Install MTK VCOM drivers (run install_driver.exe as admin).
Extract SP Flash Tool to a folder like C:\SP_Flash_Tool.