The SMS security card is invalid.

The failure of short message function of mobile phone is a very distressing problem. But don't worry, we offer some solutions to help you solve this problem easily.

Check whether the mobile phone is normal.

First of all, try to make a phone call to see if the phone bill is insufficient or the network problem is caused. If the mobile phone works, then the problem may be in other ways.

Check SMS blacklist

If the mobile phone works, but the SMS just can't be sent out, check whether the SMS blacklist has been accidentally opened. If this is the problem, close the blacklist.

Check the information center number.

If you can't receive the short message, please check whether the number of the information center is correct. If you are a telecom user, it should be noted that the telecom card has no information center number setting.

Replace SIM card

If you still can't send and receive SMS, please try another SIM card. This method can solve some problems caused by SIM card failure.

Restore factory settings

If all the above methods fail, back up important data and restore the factory settings of the mobile phone. This method can solve some problems caused by software failures.

Check it at the service center.

If the problem still exists, please take the purchase invoice and maintenance card to the nearest Samsung service center for inspection. We have been here to help you!