I can't send text messages or answer the phone, and the CMCC network service doesn't exist.

Hello, if you are a customer of Beijing Mobile, I suggest you try to change your mobile phone and card. If it is a mobile phone problem, I suggest you contact the mobile phone manufacturer to determine whether there is a problem with the mobile phone and it needs to be repaired. If it's a card problem, I suggest you take the SIM card to the main hall of Beijing Mobile to check the card to determine whether there is a problem with the SIM card. If there is something wrong with the SIM card, I suggest you get a new one. Please understand.