I have noticed that when my screensaver activates the wi-fi is disconnected hence any data usage during this time is over the phone network as soon as I unlock my phone it then reconnects. Surly this is not correct.I have only had the phone for 3 weeks and my first bill was excessive to say the least.I oversubscribed my free allowance by 50MB. I have since taken out the unlimited usage option(500MB). Anybody any ideas on the subject.Is it worth contacting HTC ?