Mobile can only surf the internet, not send text messages.

According to your description, we suggest you try the operation according to the following steps: 1. Under the standby desktop-click Application-Settings-More Settings-Mobile Network-Network Operator-Search Network-Select the network operator supported by your SIM card 2. Take out the SIM card and clean the metal contacts of the SIM card with rubber. (Is the sim card in poor contact? ) 3. Try to replace the sim card (Is the SIM card aging or damaged? ) 4. Check whether the mobile phone is equipped with software such as security guards or incoming calls, uninstall it and try again. 5. Back up mobile phone data (phone book, SMS, multimedia files, etc.). ) and restore the factory settings.