I am having problem with my data connection on my Samsung Galaxy Tab2. I start using the internet connection with no problems then at one point i lose data connection all other serviced work well sms and calls. In order to get my data connection back i either have to restart phone or else go to flight mode and off flight mode again (flight mode thing sometimes works and sometimes doesn't). Sometimes, it also says "No SIM Card". This complete issue typically happens when I have the 2G internet ON and the phone gets locked automatically. When I unlock it again, I see these issues. Is anyone experiencing a similar problem? Any solutions for these?