It doesn’t need you to change IMEI on your phone
Just get a valid IMEI from IMEI analyzer then put S before the IMEI as shown below;
After that, send the number above to 232, you will receive a message that says “your phone is not provisionable”
Ignore it, then send JOIN to 14
Use *140# to check your data balance if you didn’t receive any message or data balances, analyze another IMEI and try again.
It’s blazing hot and there isn’t time to waste time, so try it urgently.