Hi, does anybody knows a solution to switch off network selection from automatic to manually? I live on border to france, belgium and Luxembourg and always have foreign network on my iphone - this is expensive! I would need a switch for preferences to block roaming!

Click on the network of your choice to select it instead of "Automatic". This worked to keep me off AT&T's network. When I leave my network's service area, my phone simply displays "no service".

Sorry, but this I already tried - my iphone takes another network anytime without asking me!