I have a Desire on T-Mobile in the UK. Before updating to Froyo, the signal strength fluctuated between 1 and 4 bars. Since updating, it fluctuates between 0 and 4 bars, even when the phone is just on my desk at home. I did a coverage check on T-Mobile's site and the results for my postcode are "good", which they show as 3 bars out of 5. What could be the reason for the fluctuating signal? I would assume that if I was in a weak signal area for T-Mobile, that the signal would constantly be low. Am I wrong to assume this? I can't understand why it fluctuates so wildly for no apparent reason.