I had tried to update (unsuccessfully) several times before yesterday's 6.1.3 release & now I do not want to restore is there a way to get my jailbroken phone to just update?
Any help would be appreciated - thank you!
To state the obvious - you should be able to restore the phone to factory new condition in iTunes, but that would require you to have a backup or sync of the content.
It's hard to know what state things are in with a jailbreak and then a failed installation - but as long as the device is mechanically sound and the jailbreak didn't change the loading software iTunes or Xcode would wipe things and restore it to an un-jailbroken status with the latest iOS installed.
At that point you could use it - but it's not certain if/when/how you would jailbreak again. You might find it easier to attack backing up the content you care about rather than trying to patch together another jailbreak or partial upgrade - but hopefully someone else can help with more first hand experience on jailbreaking and the current iOS levels.
So far, it dosent seem possible to update to a firmware that isent the newest one (6.1.3). You could try updating to 6.1.3, then using redsn0w to make a tethered jailbreak with 6.0.0, but that might cause issues. I would watch a tutorial on that though. My iPhone has also bricked. If I were you, I would wait until there is a new untethered jailbreak for 6.1.3 or until iOS 7 comes out. Sorry to break the bad news to you . :/