I took my time to compile list of working MTN free Gigabyte imei numbers.
Take your time to tweak them.
If at first the imei numbers didn't work, keep tweaking till you are
( don't know how to tweak? Read this => http://afriwap.com/android/how-to-change-imei-of-your-android-phone/
Below are the imei numbers to tweak 359767053317082
After successful tweaking send either FREE
If you have any questions, register and reply below
Goodluck happy tweaking