I'm planning a trip to Korea soon and I'm wondering, what should I do with my phone while I'm there? Do I need to get a local SIM card or can I just use my current plan? Are there any specific apps or services that I should download or sign up for to make my trip more convenient? And what about data roaming charges, should I be worried about those? I'd appreciate any advice or tips you can give me to help me prepare for my trip.