Do you use your phone when traveling outside the US? Do you use it often? Is is necessary for you to use it?
If so, perhaps you need to think about getting an international plan through your carrier. Be sure you understand and know the limits of that plan, including minutes, charges, hours, etc.
Or, maybe you would be better off with a disposable phone. It probably won’t be the smart phone you are used to, but you won’t need to worry about minutes and extra charges.