how much do I pay for my internet on iphone 4 and T-Mobile company per month?

[595]

Oh well my dad FINALLY bought me this iPhone 4 and he doesn't really know that I have internet on it he probably will know when he sees the bill so I wanted to ask how much do I pay each month for using the internet on my iphone cuze in that case I can save up money every month and give it to him for the internet and I just use my internet for facebook, instagram and Vine .. that's it .. I don't download anything .. so answer me with the best possible answer asap THANKS ^.^
Btw my network is 3G . I just wana know how much I pay per month for the internet
Btw my network is 3G . I just wana know how much I pay per month for the internet

[Jayesh]

Your usage is probably lessthan 512 MB per month,
so get your plan for 0.5 GB

[ScσττRΛSC³]

You pick those options when buying the phone. Its not the same for everyone. Also in this case T-Mobile does not (in most places) have an iPhone friendly 3G network so expect 2G speeds.

[Just a Slowpoke]

Let's say you used about 500 MB a month, that will be about 50-100 dollars.