It doesn't need you to change imei on your phone
Just get a valid imei from IMei analyzer then
put S b4 d imei like dis e.g.
to 232 den send it to 232 a message will be sent you that "your phone is not provisionable"
Ignore it Then send join to 141
Use *140# to check your GB if you didn't receive any.....
Analyze another imei nd try again
Its Blazing so use urgently