Amoi CS6 Silver user review

Cons: Works only on 1900 Mhz in the U.S.

Summary: Just a general warning to everybody purchasing an unlocked phone for use in the U.S.: Many phones are being sold from overseas and have sometimes only one U.S. frequency band (1900Mhz), thus giving you only coverage in cities and along highways. It is important that GSM phones for use in the U.S. have both 1900 Mhz and 850 Mhz.