I don't know why these network providers are terminating their support on Blackberry devices. Weeks ago Glo and Etisalat ended their support on blackberry devices and now it is MTN' turn.
I was surprised when I received a message from MTN confirming the shutting down of their support on Blackberry phones on 27th January 2017
I think it is High time for blackberry users to purchase smartphone so that they can enjoy 100% bonus on any data they purchased from MTN.
However, blackberry users can still continue to enjoy Airtel services on their phone, though Airtel may end their support too at anytime.