I got a nokia n95 on t-mobile and recently I have been losing my network coverage signal when i first got my phone i had signal all the time and now i have to turn my phone on and off again to get some signal but then i loose it after about 2-5 mins i have checked on the t-mobile website and the coverage where i live is the highest that t-mobile offer (also my dad has got the same phone as me and he is also on t-mobile and he doesn't ever loose signal)