Trouble transferring Phone Number

[Rhino57]

Received a message saying looks like you entered an incorrect ESN/MEID. What should I do?

[slusagm]

you should provide your account number of the old service provider instead of IMEI.

Now, you need to call PM Porting assistance team and give them the account number.  I cannot post the number here but I can private message you.  Check your inbox in the Community for my message