I currently have cell provider A with my 8900 using the A SIM and all is well. I recently got a new BB,8520, with cell provider B and B SIM. I wantto give the new B device to my wife, keep my old A device but put in the new B SIM line. So I pulled the new B SIM from the new device (which was working fine) and slipped it into my old A device, the 8900.
The old 8900 works fine as a cell phone with the new B SIM. I can make and receive calls, but I can't bbm! What must I do?