Children's watches always have no signal, showing no service. What happened?

Hello! You can check whether the SIM card is properly placed and try again.

Turn off the phone, take out the SIM card, and clean the SIM card chip with an eraser.

Try replacing the SIM card.

If the mobile phone supports online upgrade, please go to Settings-About Device (About Mobile Phone)-Software Update (System Update)-Update (Please back up the data in the mobile phone before upgrading) and back up the data (contacts, SMS, pictures, etc.). ) and restore the factory settings (Settings-Reset/Privacy/Personal-Restore Factory Settings).

Note: No signal may be due to local signal or mobile phone card. Check whether it is a telecom card. General smart watches do not support telecom cards.