To repair a dead LYF F90M phone, you may try the following steps:
Check the battery: Make sure the battery is properly charged or replace it if it's dead.
Restart the phone: Press and hold the power button until the device vibrates and the LYF logo appears on the screen.
Factory reset: If the phone still doesn't turn on, try resetting it to factory settings. You can do this by pressing and holding the volume up and power button until the recovery mode menu appears on the screen. Then select "wipe data/factory reset".
Contact customer service: If none of the above steps work, your phone may have a hardware issue. In that case, you may need to contact LYF customer service or a professional phone repair service.
These are general steps and may vary slightly based on your device's model and software version.
