You can't send text messages anywhere else.

Hello, since there is no problem with the mobile phone and the server, the problem lies with your foreign carrier and your mobile phone card. You can go to the business hall of the operator where the mobile phone number is located and reissue a new SIM card, which is 10 yuan. Can't send in other places: when sending information, because the short message needs to exchange data with the communication station to which your number belongs through the local communication station, you can't send information when there is a problem in the base station.