By mistake I deleted the registered blackberry e-mail which was on my device from the Service Book options.
I thought its no big thing, I went back to the site from where I set it from, reset the e-mail address, but the e-mail address does to register on the device!!!
I tried undeleting the e-mail address from the service book but now I can't send or receive messages!!!!!!!!
Someone advised me to delete service book history and send service books from the site..but now that won't help!!!!!!!!!!
The e-mail address has completely dissappeared, and so has the e-mail setting icon
i switched from the curve 8300 to the 8310 recently and forgot to transfer the initially established blackberry account over to the new phone,blackberry customer service did it for me over the phone in a couple of minutes they were very helpful...i got the number when i contacted att customer service....or you can google them for their number.