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: You’re still stuck on Android 6.0, meaning many newer apps won't install. Oppo A57 (2016) - Full phone specifications - GSMArena.com
To flash custom firmware, you'll need:
| Project | Type | Android Version | Working | Broken | |---------|------|----------------|---------|--------| | (4pda) | Debloated + deodexed | 6.0.1 | Everything | None | | Project Treble GSI | Unofficial | 8.1/9.0 | Boots, Wi-Fi | RIL (no SIM), Camera | | TWRP (unoff.) | Recovery | N/A | Backup, flash zips | Decryption, OTG | oppo a57 2016 firmware
⚠️ Flashing – no recovery after.
The firmware for the A57 (CPH1601) evolved through several incremental updates. Oppo utilizes a region-specific OTA (Over-The-Air) update mechanism, meaning version numbers vary slightly by country (e.g., Indonesia, India, Philippines, China). : You’re still stuck on Android 6