Check more than the model badge
A 320i or 420i badge alone does not establish mobile Flash compatibility. Current MOSTUNED packages require checking the engine, ECU and software together. Confirm eligibility for your B48B16 / MG1CS003 vehicle before buying.
Your iPhone and connection
Install MOSTUNED using the TestFlight link. Connect with a compatible ENET or WiFi-ENET adapter and check the VIN and ECU information in the app. Resolve connection issues before starting a write operation.
Unlock and Flash authorisation are different
Unlock Check checks the ECU lock status. VIN authorisation determines which vehicle has access to MOSTUNED Flash. An eligible ECU does not by itself mean that a Flash licence is assigned.
The final check before writing
Select your package and a calibration suitable for your hardware. Check vehicle and phone power, then complete the preparation steps shown in the app. Maintain the connection throughout. If a warning appears, share the error screen with support.