My Galaxy S2 has been fine for the 19 months I've had it, even after the upgrade from Gingerbread to Icecream Sandwich. But 2 weeks ago I picked it up off the table to find it was half way through an update (not realising there was a new version on O2 yet). Once it finished Jelly Bean looked great I was extremely happy. But then I realised that after leaving it on an all night charge (which I have always done) it would sit in my pocket at work, hardly used, and the battery would die around 2-3pm. I have just switched the vibration off, screen brightness right down, bluetooth off, Google now off and put it on charge again now I'm home. Now it is running extremely slow, taking up to 10 seconds to react to anything I press. Every day since it has updated my phone has frozen at least once, today 3 times and I've had to hold the power button for 20-30 seconds to get it to reset. I want to go back to Icecream sandwich because it seems either my S2 cannot cope with jellybean or it is dire need of another update with fixes. Please help before I switch to a Windows phone.
