blackberry free internet ? is this for real ?

[ODUODU]

Have anytime topup 100 on a blackberry curve 8250. After my airtime expired this month I realize I'm still able to browse the internet and download large files. Mtn says its blackberry free internet service. Is this for real ? Free internet on a mobile device in south africa ? Come on there must be a snag somewhere. Please advise anybody.

 

[frikkie]

 

[undefined.za]

 

[JuggyUK]

 

[dean]

 

[Ryan.Nil]