BGR has found something very interesting while analyzing their logs. In the logs, there’s a clear indication of existence of iPhone OS 3.1.3 and the major release – iPhone firmware 4.0.
From the logs, we can only tell about the existence of iPhone firmware 3.1.3 but there’s no info about the features. One thing is for sure that major features can only be found in OS 4.0. iPhone 3.1.3 firmware will just bring bug fixes. We can expect iPhone firmware 3.1.3 any day now but the major release – iPhone OS 4.0 will be released next year around March.
If you’re using a jailbroken or an unlocked iPhone, you better stay away from any upcoming firmware update or you would lose your jailbreak and unlock.