I took out a MTN TopUp 100 contract with A free Blackberry 8520 for R149 per month. The monthly subscribtion includes BIS and airtime to the value of R100. I have noticed that my R100 airtime gets less and less as I surf the internet on my phone. I called Nashua and was informed that certain sites are not free. This I dont understand. I don't stream videos and do any downlaods. Even when I am this website my airtime gets deducted. Anyone have any info on this?