I recently switched from BB plan to non-BB plan on Fido since they offered much more bandwidth for less money.

I have BB 8800. I changed TCP settings and I got all my application up and going (took me a day). Sometime after making phone calls, none of the applications can access the network. As a result I half to disable mobile network for several seconds and re-enable it for everything to work again. It is a very frustrating procedure.

I have already upgraded OS to 4.5.0.

Any suggestions?

Have you tried a battery pull (with the BB ON)?

Welcome

No. I will try it. But I though upgrading OS is kinda similar to battery pull.

Nick, thanks. I think it helped.