We are going to Orlando as a large group next Spring and will split-up quite often. My wife has an O2 Network mobile telephone while I am with Orange. The situation will demand us to be able to call each other's mobile often and also to make outgoing calls within the USA; these latter will be mostly in and around Orlando but a few may be to other states. Are there any special precautions we need to take to avoid sky high telephone bills?
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