We have two phones through my wife's contract.
On my SGS II I had unlimited data. I never realized just how much I used it until a O2 rep called to "let us know" I had used about 6 gig of data that month. Wanted to know what it was on and that all was ok, LOL
Funnily 4 months before my upgrade they called again to say they will not be continuing the Unlimited option as they deemed 1-2 gig to be enough.
And trust me, you don't miss it till its gone! Im now watching every darn kb pass in fear of it running out, for me 1-2-3 GB is nothing.
The frustrating thing is, they wont offer me a plan with more than 2 gb a month??...
So Im now having to look in to getting a external Bluetooth sim thing (tbh, cant remember what they're called, which isn't helping me find the one im after..

)
I'm now jealous of a friend that has kept his unlimited plan for the past 5 or so years.... (was a special offer, bet they didn't see him keeping it this long lol) He's even forfeited his phone upgrades to keep the contract, smart guy.
My advice, Never give up your unlimited mobile internet.
Oh, and just before all you haters start hating, I don't tether and I don't torrent on my plan :angel: , I do alot of streaming :good: