The mobile phone has network signal, so it can't surf the Internet, send short messages, receive short messages and make phone calls.

Common reasons and solutions of mobile phone not answering the phone: 1. Check whether the mobile phone is in arrears, and it is recommended to pay for it; 2. Check whether the mobile phone is set with call forwarding, flight mode on and call barring. Suggest canceling and try again; 3. Check whether the function or signal of the mobile phone is normal. It is recommended to change your mobile phone or location and try again. 4. If roaming to other places can't be used, it is recommended to check whether the local network signal is normal and whether the number has been roaming; 5. Try restarting or changing your mobile phone to see if you can answer the phone; 6. Bring your mobile phone card to the local business hall for testing or replacement. If your mobile phone can't send short messages, you can try to restart or change your mobile phone for testing to see if the following conditions exist: 1. The SMS center number is set incorrectly; 2. No signal or low battery; 3. The system is busy during the peak period of holiday SMS sending. We suggest you try again later or avoid the peak period. 4. The sending format is incorrect. If you send a short message to PHS users, you need to add the area code before the number; 5. The short message sending time exceeds 24 hours; 6. SMS inbox and outbox are full. 7. To inquire whether the SMS function is enabled, you can contact the local manual customer service for processing. If the above reasons cannot be solved, you can contact the local manual customer service or go to the business hall to confirm whether the SMS function is enabled and hand it over to the staff.