Great news everyone just found a way to downgrade from iOS 6.1.3 to iOS 5.1.1 without SHSH and you can actually unlock iPhone. Very nice and thankful to this folk.
How to downgrade iOS 6.1.3 to 5.1.1 without SHSH
Step 1: Download the following firmware, itâs devided into 5 parts so you may want to download 5 of them. Just forget about the rest. Download it at http://cc.cc/n2e4
Step 2: Put your iPhone into DFU mode and restore it with the firmware that you download in Step 1
Step 3: Download RedSn0w 0.9.15b3 [Windows | Mac]
Step 4: Launch RedSn0w 0.9.15b3 choose Extrasâ">Select IPSWâ">Choose the firmware you downloaded in Step 1
Step 5: Keep going and click Recover Fix > Just boot
Step 6: Thatâs it. Now go ahead and jailbreak your iPhone. Congrats you just downgrade iOS 6.1.3 to 5.1.1 without SHSH. For the jailbreak and unlock part I think you can do it on yourself. If you have any question or concern please comment below.