The Mtn Dead Sim, THE REAL HACK
1. Dail 1333 and follow the voice prompt.
2.Enter your MTN number and press 1 to confirm
2 Enter your new 4 digit pin code and press 1 to confirm
* Now, you will hear "welcome to mtn self service... bla bla bla"
4. Press 2 to connect or disconnect your MTN number
5. Press 2 again to disconnect your MTN number and confirm, N
Now cut the call and wait for 5 minutes for your number to discount (deactivate) try to call or text with your phone and you will relies none of them is working. In 2010 when this MTN dead sim was discover you could still see data on your phone where the network bar is located , like G, E, 2G, 3G, H, at the time, you could use it to browse till you die using the apn internet or wap. it was also the fastest internet at that time..... but it got blocked in 2013,
Now after following the method above you wont see data G, E, 2G, 3G, H, on your phone and it wont allow you to browse again.
To reactivate your MTN line, use a different number and dial 1333, when it ask you to enter your mtn number, just dail the number which you deactivated and enter the pin you used, follow all the steps above till you reach step 5, Now press 1 to activate your number and confirm, wait for 5 minutes and your MTN line which was disconnected will be connect(reactivate) again