Which iPhone 5 model for South Korea SK Wireless

My Mom is visiting in the next few months and wants me to get her an unlocked iPhone 5 so she can take back and use on SK Wireless in South Korea. Is it better to get her the Att or the Verizon model?

Thanks

Tea-Aholic said:

You want the A1429 model aka the Verizon model.

Click to expand...

Perfect, thank you.

Also had another question.

I have the AT&T model. If I unlock this can I use HSPA bands in Korea?
I know I won't get LTE but just wanted to know if I'll get 3G service at least for my phone when I visit the parents.

Thanks in advance!