Samsung s7 interface shows that contact information cannot be used.

It is recommended to try as follows:

1. It is recommended to enter Settings-Application Manager-All-Contacts-Try to clear data.

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

3. Does the attempt to replace the SIM card improve

4. Back up the important data on the mobile phone and try to restore the factory settings

5. Test after updating the firmware version of the system.

if the problem still exists, it is recommended to send your mobile phone to your nearest service center for testing.