I have 2 BB's a 8800 and a 8830. I only have one SIM CARD(ATT) and I only have 2 EMail accts( blackberry account thru AT&T, and yahoo. When I put the simcard into the 8830 I cannot receive ANY email, even thought this was the original device???? Both are synced thru the BB Device Manager, but my email will not come thru to the 8830?? Please help.