I had a similar problem and found out the main culprit was the standard HTC Mail app, which only had my Hotmail account set up in it. I'm guessing this was because it was checking every 15 minutes and pulling down the same stuff over and over. I logged into Hotmail on my PC, set it to forward my mail to my gMail account, and disabled the HTC Mail app (removed the Hotmail account and set it to manual) and just use the gMail app now, and my data usage is probably a third of what it used to be (typically 4 or 5 MB a day, on a 500MB tariff you need to be under 15MB).
|