hi mate at the moment 6.1.3 is still a tethered jailbreak , which means every time you reboot/restart your phone you will need to choose the just boot option in redsn0w, because of the firmware 6.1.3 and your baseband , you will have to wait for the software unlock , im lead to believe that the next jailbreak untethered will be on iso7, unless the dev team have expliots to waste on the 6.1.3/6.1.4 which means you will be waiting, so personally i would get a proper network unlock off 02, 1st though, you will have to make sure its original network provider is 02, if it is you will have to contact them .an unlock via ultrasn0w is a software unlock , if you have to restore for any reason you wipe the unlock, hope this helps