The SMS function of the mobile phone doesn't work, so it's turned off.

According to your description, because you can't determine the specific model of the mobile phone, if it is an Android phone, I suggest you try the following methods:

1. It is recommended to go to Settings-Application Manager-All-? Information? -Clear data attempt.

2. Check whether software programs such as mobile phone security guards are installed in the mobile phone. If there is an attempt to uninstall, please check whether the installed third-party software is incompatible or caused by software restrictions.

3. Back up the data on the mobile phone and try to restore the factory settings of the mobile phone before installation.

If the problem still exists, it is recommended that you send your mobile phone to the nearest service center for testing. Please click the following link to find out the specific location of Samsung Service Center:

/support/location/supportservicelocation . do page = SERVICE。 Location and place. cid = cn _ PPC _ support _ service _ repair net _ 120522

Welcome to Samsung Digital Service Platform: /ask