Telecom mobile phones can't make phone calls and send short messages to surf the Internet. What happened?

1 Your sim card may be inserted in the wrong place, which makes it impossible to make calls and send messages. ) 2 If you just can't make a phone call with the telecom card, it is suggested to pull out the telecom card and wipe the card core of the telecom card below, which should solve the problem. 3 Dual-network mode may not be turned on in the settings. There should be dual card mode in the phone settings. Click Open to open the dual network. If there is something wrong with the mobile phone data, you can solve it by swiping the machine. For more service offers, click on "official website" Customer Service 2 19 below to answer your questions.