About 75% of the time, whenever I make/receive a call, my phone's coverage goes down from 3G/E to just 1G. Then after I'm done with the call it will hop back up to 3G after ten seconds. I'm not sure why it does this (I have 3G in the areas this is occurring, so it's not that I'm simply dropping to 1G.), can anyone shed some light on the situation? or does anyone else get this, this surely can't be normal...? I'm on an iPhone 3G btw. Thanks.