AT&T's GoPhone prepaid service is a pay-as-you-go mobile provider owned and operated by AT&T. GoPhone differs from traditional mobile phone providers by giving subscribers the option to pay for a 30-day period of service each month or pause service without any contract or fees.
GoPhone customers can use modern smart phones such as Apple's iPhone 5s or Samsung's Galaxy S5 devices. GoPhone offers a range of plans between $30 and $60 per month as of 2015. The most high-speed data is available in the $60 per month plan and features 4 gigabytes per 30-day period. After the customer reaches the 30-day high-speed data limit, speeds are reduced to 128 kilobits per second.