Not really blaming giffgaff although the expensive PAYG rates are the other reason. I've ordered a Talkmobile SIM (Vodafone) to try out. No signal at all on giffgaff or very poor / intermittent and not just recently consistently so. Why are O2 so bad!? Not only are they the worst for 3G coverage their 2G now seems awful as well. Not planning on leaving giffgaff entirely but the giffgaff SIM will have to come out of my dual SIM phone it's not even usable for backup. That's not backup if it doesn't work. I get a better signal on Three than I do on giffgaff/O2 that doesn't make sense taking the different frequencies they use into account.