Its A long time I've posted here but am back with MTN Free 100MB..
After successful tweaking don’t send
anything, just wait for at least 2 or 3
minute to receive a message saying
Thank you for activating
your device on the MTN
Network. Your special bonus will be sent
to you shortly.
After 5mins.. You will receive message saying
Congratulation message from MTN for
receiving 1000MB to use on your device
Note: If you've wait for 3mins after tweaking that means the imei is used.