It’s been a while since Pantech has released a smart phone. I was skeptical when I first laid eyes on the Pantech C810, also known as the Pantech Duo. But all of my doubts were soon washed away. I don’t know if this dual sliding, smart phone could have been executed any better. The Pantech Duo is available through AT&T meaning it’s GSM. It operates on the 850, 900, 1800, 1900 frequencies, meaning the phone will suit all of your international traveling needs.