All you need to browse for free is to configure your mobile phone to the MTN default GPRS configuration.
Now for your operamini 4.2 configure as
HTTP SERVER: http://22.214.171.124:80
SOCKET SERVER: socket://126.96.36.199:1080
HOST: use firstname.lastname@example.org
Enjoy this latest free browsing MTN trick while it lasts....
Note that this latest free browsing cheat is tested and confirmed by mua. Therefore it rocks and works like mad