I have been out of the tech game for quite a while now (my wife and I use 6S+ phones) and am finally looking to buy new phones as ours are finally dying. We live in northern Georgia and use T-Mobile currently, but my wife travels to Korea occasionally and stays for 2-3 months while there, so I am looking for what will work well for her when there as well as here. Does anybody here have experience with using a phone in S Korea? What iPhone supports the frequency bands used there? I have been looking at the iPhone 13 (not Pro) and understand it will have to be unlocked (either buying unlocked or having it unlocked after the fact). Do you know of any good deals? I realize that our phones are so old they normally will not be worth much in trade, but sometimes there are exceptions. My wife will probablyu be traveling sometime early next year, but now would be good before our phones completely die. Hers is only 16GB and continually out of space because Other is so high, and I haven't found a way to reduce it. I previously would back it up and restore from the backup but now there is not even enough space to do that. I am afraid to completely wipe it and restore, which would probably work but might also lose all of here KakaoTalk history and address book (not an option). Any suggestions are greatly appreciated.