The mobile phone shows that 2g can't send text messages.

About the problem that iphone5 can't send text messages. For example, Hong Kong version of iPhone5, Unicom 2G network, can not send text messages. I consulted many knowledgeable friends and three cards were cut. Finally, I changed a small card. I used my iPhone to dial *5005*7672*+86 SMS center number # to set up the SMS center, and nothing was solved. Finally, please ask iphone after-sales support 400-627-2273: "Setup-General-Recovery-No signal after restart-Closing cellular mobile network-Unicom signal appears-Success, three minutes to solve. If you have the same problem in the future, you can ask after-sales directly!

If you try to send a text message to multiple recipients, and you manually enter each number instead of using the address book list, make sure to separate each number by pressing a line break instead of a space. If you still can only receive messages, you can't send them. After eliminating the above problems, you can use the internal command to query and edit the SMS center number:

Set SMS center number: dial *5005*7672*+86 SMS center number # with iPhone;

Delete SMS center number: dial ##5005*7672# with iPhone.

Inquire about the set SMS center number: dial *#5005*7672# with iPhone.

When using the internal command, first use the delete command, and then set the SMS center number.