Best UK Carrier for Internet Allowance

[JosephDuffy]

I'm looking at getting an iPhone 4 White (If they ever get released) when my Internet allowance runs out in 3 months.
I've been looking over the PAYG deals, and only seem to be able to find 500MB per month maximum. I know that they've been lowering it from unlimited (Which is what I get right now), but I was wondering, is 500MB enough? I try to download Apps via WiFi, but I'm afraid watching TV etc will push me over.
So my question is, who's the best UK carrier for this?
I need one that will text me when I reach around 450MB.
I'm also thinking about going with Tesco, as the phone itself is around £50 cheaper.
Anyone seen any "good" PAYG deals flying around?
Thanks,
Joseph Duffy

 

[milamber]

Hi you should check out giffgaff.com.

It's a MVNO network running on o2 so whatever reception you get from o2 you will get from giffgaff. It offers unlimited internet and unlimited texts with no fair use policy!