I have a Samsung Galaxy Mini, which occasional decides it will not connect to the internet. I try to open it, and it informs me there is "no internet connection" and the 3G lights at the top refuse to turn on.
If I turn the phone off/on again, they light back up and I get internet.

Is there anything I can do about this? Adjust a setting or re-activate the 3G within teh menus somewhere?