Mine has been doing this for 2 weeks now. I just installed the upgrade a few days ago. It is still doing it. Trying to research best Android tablet to buy my 13 year old son for school and I am close to smashing this phone to bits. This phone has sucked since I have had it..over 3 months now. Sprint is zero help. HTC is more help (regarding dropped mobile / data connection) but that still flakes too. Anyway..anybody know the fix for the latest browser / websites closing issue, how to keep mobile connection ON, or best Android tablet for son (around 300.00 & used is okay). Would appreciate it!