vivo x5 received a text message wosl4a what does it mean?

Hello!

You can call the number that sent the message to verify. If the message is not from a normal contact number, it may be that you have downloaded some third-party software, registered an account, and sent a verification code. oh.

If you have any questions, you can consult us at any time. Thank you very much for your support of our vivo, and wish you a happy life!