I have an unlocked iPhone on a paygo sim here in the UK on T-Mobile network and i just logged onto my tmobile online recent usage as i couldnt understand the weird way my credit was reducing. It turns out everytime i turn on my iphone - and i dont check my mail via gprs (only on wifi at home) - i get charged 1p for 1k of data download. It comes up as TMO Network Coupon 2101 QOS1000 1k - 1p. It seems to correspond with when i turn my phone on from 'sleep'. Has anyone else noticed this problem? Can i do anything about it? Thanks.