O2 (UK) 3g issues-Poor signal Edinburgh

I bought an iPhone 3G couple of weeks after it came out(Edinburgh, UK). Since then, i haven been able to use 3G speeds only for minutes. Switching from 3G to 2G and back to 3G is unreliable when you move in and out of coverages. This leads to dropped calls, missed calls, etc. I have been using 2g literally all the time and am only able to download large emails via wifi at home. This is hugely disappointing. When I contacted customer services at O2 they say Edinburgh doesn't have many 3G cell towers. ALso suggested i dropped in at one of their stores to check if the handset is faulty. At the store, my phone showed similar number of reception bars as their display phones....so not an issue with only my phone. They also said that the signal in edinburgh is due for a boost(whatever that means). But when I hear about 3G issues around the world, I am having second thoughts about the problem being merely in the network. Is it a combination of poor O2 coverage and faulty 3G chips in the iphone3G?

And you're not alone in Edinburgh, either: I can't make any calls with 3G switched on - I just get a "call failed" message. The problem is only a few days old; prior to that, it was working perfectly. Is the latest update to blame?

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