A:AnswerMika, We asked the sales clerk to look up the details on which countries it would work and they have a list they checked on-line for us. You may have to go into the store and ask like we did. The information also might be found on-line. Try it. We bought the ours at Best Buy and a sim card in France and had no problem using the phone.
A:AnswerDepends on the band's available for China's cellular services, but YES, it is an unlocked phone and can be used with most any network that supports Nano sim cards.
A:AnswerI don't think stores support shipping to PO boxes or hotels although I may be wrong. Also, keep in mind that the Galaxy S7 and S7 Edge are already rolling out.