Going to Korea soon, need a pay as you go SIM card?

I'm in the States right now. I have a Verizon iPhone 6 so it works with most carriers. I need a plan that has a few texts and maybe 10 minutes of call. I will only be gone for a week and don't plan on texting (maybe 20-30 at most) much nor using the phone to call. I just need a phone to respond to some texts and make a call when I get back to the States. Where can I get this pay as you go plan that would work for me?

BUY cash phone when you there

I think you should get the One SIMCard as it will be cheaper.

Link: http://www.onesimcard.com/cell-phone-rates/south-korea/