Check the battery health and replace the battery if it is degraded
Charge the phone with a reliable charger and cable
Turn off battery saver or low power mode
Close apps that may be crashing or draining power
Remove overheating conditions and let the phone cool down
Update the operating system and apps
Restart the phone
Remove recently installed apps that may be causing shutdowns
Free up storage space
Disable automatic shutdown or scheduled power settings if available
Reset settings if the problem continues
Back up data and perform a factory reset if needed
Contact the manufacturer or a repair technician if the issue persists