After running the update my phone wil not let me go back or minimize an open app it continues to tell me that either the app is not optimized for use with android 15 or that my touch sensor is delayed. Also, I cannot access half of my apps if it requires me to slide menu up. Its as if it locks up and I cannot access them unless I toggle the phone off n on several times . I ran a test on the phone but it works in that particular app just none of the rest.