How do we know which carriers are using GSM network in USA ?
To find out which carriers are on GSM network, please visit www.gsmworld.com/roaming/gsminfo/index.shtml. However, Factory Direct is not responsible for the content on the website. It is up to the customers to consult with their network provider.
What is an unlocked phone meant ?
Unlocked phone means the phone is unlocked with any networks or carrier networks. All our phones are factory unlocked so user can use with any GSM network by simply install their GSM network sim card into the phone.