Sending verification code prompts that SMS is insufficient.

Short message margin is insufficient. Literally, it can be understood that there is not enough memory, and the mobile phone memory can no longer store a short message. In that case, check whether there are many short messages in the mobile phone and delete a few. You don't need to keep the useless ones, which takes up space. It should be better to clean up the junk files and useless files in the mobile phone and deal with the memory.