It seems to have gotten better the past few days. But there haven't been any updates either.
Mystery solved, annoyingly my tethering plan doesn't start for another nine days!
At least last nights update seems to have solved my phone losing data connection as long as I don't tether!
Just to reiterate, my tethering issues was found to be a problem with my data plan.
my solution still is to switch off data connection and switch it back on ... dont know why but still suspect its a carrier specific problem !!!
Problem came back for me after several lovely days without it after the most recent update