What's the matter that the mobile phone can't access the mobile network?

The mobile phone can't access the mobile network, which may be due to the weak or no signal in the area, the operator's network failure or maintenance, the wrong mobile phone network setting, arrears or SIM card problems. Solutions include checking signals, contacting operators to inquire, checking mobile phone settings, recharging phone bills or replacing SIM cards. If the problem is still unresolved, it is recommended to go to a mobile phone repair shop or contact customer service for further investigation.