I'm currently living in Australia, and thinking of buying a used BAD ESN phone when i go visit my family in new york to bring back and use in Australia. I do understand that the BAD ESN WON'T work in the states, but my question is will it work in Australia with a bad esn? Do i have to do anything else to get it to work, or if i make sure that its unlocked be enough? Also can it be a sprint phone? I know they are domestically locked but internationally unlocked, so even if its a bad esn will it work overseas if its internationally unlocked? Thanks.