I was having the same symptoms on my HTC Dream on Rogers, I wonder if the root problem was the same. Enabling only 2G networks stopped the issue at the cost of

I was having the same symptoms on my HTC Dream on Rogers, I wonder if the root problem was the same. Enabling only 2G networks stopped the issue at the cost of paying full price for crippled data. After fighting with Rogers and 2 phone replacements on warranty and no co-operation to reasonably upgrade to a different phone I gave up and purchased an unlocked used iphone - it works without issue. Personally I like the Android OS and UI better but I need my phone to not randomly stop being a phone.