S4 is turned on, but when someone makes a phone call, the mobile phone is turned off, and the short message cannot be received, and the wireless network can be normally connected without the metal mob

S4 is turned on, but when someone makes a phone call, the mobile phone is turned off, and the short message cannot be received, and the wireless network can be normally connected without the metal mobile phone case. Hello:

According to your description, I suggest you:

1. Check whether the phone is down.

2. Plug in the sim card again and replace it with other types of sim cards.

3. Shut down and restart, pull down the screen top curtain, turn on the data switch, and check whether it is back to normal.

4. Check whether the mobile phone is blacklisted.

5. The network signal is not good, try again.

6. Try changing another location.

7. It is recommended that you restore the factory settings of the machine according to the following steps: Setup-Reset-Restore the factory settings (however, since restoring the factory settings of the machine will lose all data in the mobile phone, it is recommended that you back up important data such as phone books, videos and pictures in advance).

If there are still problems through the above methods, please bring the purchase invoice, maintenance card and machine to Samsung service center, and the engineer will check and deal with the machine. Please click the following link for the specific location of Samsung Service Center:/support/location/supportservice.do? Page = service. Location and place. cid = cn _ PPC _ support _ service _ repair net _ 120522

Welcome to Samsung Digital Service Platform: /ask