Unable to send SMS, error code 8. What's the situation?

One possibility of unsuccessful texting is that when you send a text message, the system automatically adds a prefix to your recipient, such as 12593 or 1795 1.

How to view it: Click on the short message you sent and select "View Details".

The reason for this problem is that you have set up automatic IP dialing or your friend's mobile phone number has been saved in 12593 or 1795 1.

Solution: every time you send a text message, you should change the recipient number in your recipient column (it is more troublesome to remove the prefix)

Another way is to cancel the automatic IP dialing, and then turn on the automatic IP dialing after you send the text message, and there will be no problem in the future.