: Many users report that Chinese ROMs aggressively kill background apps, causing missed notifications for global apps like WhatsApp or Gmail. Methods for Conversion 1. Full Firmware Flashing (Advanced)
Once finished, your OPPO A57 finally behaves like the international smartphone it was meant to be. You get seamless Gmail sync, YouTube, Google Maps, and timely notifications. It breathes new life into an older device. oppo a57 china to global firmware