The last update for my phone was in Feb, Since then my phone has been acting very slow in everything. My screen rotates for no reason. My screen will go blank and then pop back on slowly. It's very frustrating. I'm not the only one it's affecting, I have 2 co-workers with the exact same phone and having the exact same issues. It's so bad that I've considered getting a different phone but I don't want to. Help!!