Hi, I've had my Galaxy S3 for nearly 2 years without and major problems. Last week I was unable to send SMS messages, the phone just said sending failed. Then I noticed that my data connection wasn't working even though it was turned on. Since then, if I restart my phone, the data and texts work for about 1 minute before the data icon freezes and eventually disappears. I've noticed that if I disable mobile data when it freezes, it takes about 3 minutes for it to turn off, and then doesn't come back if I turn it on again. If I turn flight mode on, it again takes about 3 minutes to turn on, although for those 3 minutes you still can't do anything as the flight mode button is 'greyed out'. Then when the airplane icon is showing at the top of the screen, if you hold the power button so the menu appears, the button still says "flight mode is off". If I want to use data when I'm out and about I'm having to restart my phone, and so I'm having to do this 20+ times a day. As you can imagine, this is frustrating. Any advice would be appreciated.