Correct me if I'm wrong, Jbing your iPhone will break the push notification certs in your iPhone as well. One could create the certs again by reinstalling the OFW and extracting the certs then JB and insert the certain. The certs are supposed to be unique to every iPhone. The process is actually quite tedious. I found website selling certs that they've pre-generated at usd 5 and I've bought it coz then there was no push doctor available. And the other push fix didn't work for me. But affter paying for the fix, it worked flawlessly.