From the Terms and Conditions
The NET10 Unlimited Plan includes unlimited nationwide local and long distance calling, unlimited nationwide text and picture messaging and unlimited data or mobile web access when available. The unlimited plan includes up to 2.5 GB of high speed data during each 30 day plan cycle. After reaching that usage, data will continue at 2G speeds for the remainder of the 30 day cycle. High speed data is restored once a new 30 day service plan is added. Actual data speeds are subject to your wireless device’s capabilities, coverage available in your local area and existing network conditions. The NET10 Unlimited Plan is not available in all areas. NET10 may modify or cancel the NET10 Unlimited Plan at any time and for any reason without prior notice. The NET10 Unlimited Plan may not be combined with any other discount or promotion. National Roaming capability may be discontinued or changed at any time without notice. NET10 reserves the right to terminate the Service of any NET10 customer who is roaming for 50% or more of usage in any 3 billing cycles within a 12 month period.