For the past week, my 4S has done some weird stuff. 1. When I received a new text with the Messages app already open, it would play the ringtone twice. It took a few restarts to fix this. 2. When I get a text and the phone is locked, instead of the screen turning on for a few seconds, it would turn on then off really quickly (split second.) This has happened a dozen or so times, all randomly. 3. When it's locked and I hit the lock or home button to turn the screen, sometimes it doesn't turn on. Other times it'll turn on then off quickly and I have to push it a few times to get it to stay on. 4. Now today...I got a text with it locked. The screen was really dim. I immediately checked the settings and auto-dim was off (like usual) and the brightness was halfway. I had to readjust the brightness for it to come back to normal. After I did that, the screen flickered on and off for 4-5 seconds. I really thought this was the end of my phone, it was that bad. Since then, it's worked fine. Anyone else experience any of these issues? Common problem with the 4S? Thanks! ****EDIT: 30 seconds after I posted this, I got a text. Screen lit up for a split second and only half the ringtone played. I hit the button to turn the screen on and it's dim again!!!!