Downgrade iPhone Running ios 6.1.3 to ios 6.1.2: Currently we cannot support this process. It is very complicated and requires some extra research to complete the process. Not all phones will be able to be downgraded. The best thing to do is not update the iPhone to 6.1.3 until there is a stable untethered jailbreak, and a stable carrier bundle and commcenter patch created. Please follow these instructions carefully, and use google to find any information that you need.