Both my iPhone and iPad were on 6.1 beta 4. I upgraded the iPhone to beta 5 in time and there was no problem. However I was late in upgrading my iPad and last night (8PM EST) it turned to activation screen. I plugged it into iTunes and iTunes told me that the beta has expired (as expected). So I upgraded to beta 5 via iTunes. But after the upgrade my iPad still complains that activation server is unavailable and this time even iTunes could not help (also says cannot activate). Any one on the same boat there?