I've got a new Telstra Smart-Touch Next Generation and I logged on to my G-mail account so I could use the calender and other apps. After a while I realised that my credit was being eaten up bit by bit, a few cents an hour I think. I thought it must be my G-mail and I tried to log out but didn't know how. So, I went to my G-mail account on my Mac and deleted it. Now my phone says that I've entered an incorrect password and wants me to type it in, and most importantly my credit is still being used up and I don't know what to do. I was thinking that maybe I should reset my phone but I don't want to lose my contacts, messages and apps.
Should I reset my phone? Can I backup my phone's data beforehand if I do this?