International GSM cell phones are fast becoming one of the most popular cell phone standard for cellular phones in the world. International cell phones are already available in over 210 countries including the United States and offer greater mobility and superb call quality digital. Although the most common type of digital mobile phone service in the US is CDMA, but almost all the other countries in the world use GSM cell phones. For a cell phone user, there is very little difference between using the CDMA or GSM cell phones unlocked, but these ...