Here is how to configure your blackberry phone to work with MTN Nigeria network.
MTN Blackberry Settings for Blackberry OS 6.0 and above
Here is what you should do:
Select “options” from your BB home screen
Go to “device“
then choose the “Advanced System Settings“
In the space provided, enter these:
MTN BB settings for Older versions < 6.0 (i.e 5.x, 4.x etc)
Just choose “options” from your phone’s home screen.
Choose “Advanced Options” and then TCP/IP.
Make sure the “APN Settings Enabled box” remains checked. Additionally check the “APN Authentication Enabled” box if your carrier requires a username and password, otherwise leave it unchecked and leave the fields blank.