Understanding the Issue
- Error: 'SIM card not detected.'
What happens and why
A SIM card error causes signal loss that does not return.
Help & How to
To fix the SIM error, follow these steps:
- Update device to the latest software version 3.14.531.11 710RD.
- Verify the SIM card is inserted correctly.
- Press and hold power button for 10 seconds to perform a power cutoff and reboot the device.