Well I assume you downloaded some sort of app that requires network access (like a web browser), and it's not connecting. Well I've never used a Nokia 3110c, but the general method is to go to the app in the menu, and then one of the menu buttons should open up a sort of "Properties" window, and from there you should be able to alter the network access. The usual options are "Once" "Always" "Never" and "Always Ask."