I've been with Giffgaff years now, I'd defiantly recommend it for price and useage, saves me a fortune!
Signal and 3G ain't bad, I'm a courier and there are quite a few parts of the uk where I get bad signal, but my iPhone 4 is kinda beat now so that might be part of the problem lol.
I've known Giffgaff to crash about twice since I've been with them, they fixed the problem fairly sharpish and even compensated everyone! (Not much mind you, but it's the thought that counts )
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