Hey david. Do you have Wi-Fi at home? You maybe using Wi-Fi connection. That may be the reason you don't have connection once you leave your house. Check your settings if you have data turned on. If it's off, just turn it on and you should be ready to use data anywhere.
You know what worked for me...
Switching to airplane, lost connectivity, waited 5 minutes.
Switched the airplane off and I was to select an operator.
Because I'm using Cell C, I always Chose Vodacom for network connection, for better and faster internet access you know, and then I selected home network which is Cell C.
I went to Opera Mini and booooooh!!! It went on, was even able to access every page.