i just subcribe to mtn monthly internet browsing on phone so i want to know hw far the 100 mb can go whether it can sustain me for a month and whether i can use it for opera mini,bolt or ucweb to browse

it depends on how much u browse. if you browse on fon alone it 100mb should take you the whole month unless u download video.
if u connect the fon to pc , then its another matter. u'll have ta buy more mbs or subcribe to a higher bundle package.

in ghana 166mb from mtn cost 5cedis ie around 40 us cents or 0.4 dollar. so u may try pay as you go.
note that you must buy a special mtn data sim card to get this feature for its much costly to use the ordinary mtn sim for browsing. u can check out at the nearest mtn care for u centre.

wish u de best
arbayong