Improper flashing or using a ROM meant for the "A37f" (Indian variant) on an "A37fw" (Global/International) can sometimes cause partition errors, though they are usually cross-compatible. 6. Conclusion
Standard fastboot oem unlock on Oppo A37fw. You need unofficial methods: Oppo A37fw Custom Rom
After scouring XDA Developers and 4PDA forums, these are the most stable and feature-rich custom ROMs for the Oppo A37fw. Improper flashing or using a ROM meant for