Developer @winocm has been pretty vocal as of late about his intentions to eventually release a jailbreak for iOS 6.1.3 and iOS 6.1.4 devices. Although we generally take such claims with a heaping helping on my favorite seasoning, winocm is, from what I've been able to gather, a respectable member of the jailbreak community.
After all, this is the same developer that worked on an iOS 6.x downgrade, the jailbreak tweak Accentify, and has had various other contributions to the community. Needless to say, when he announced that he had an untether binary that still needed a bit of work, my ears perked up.
A few days ago, winocm reached out to iDB about his progress on the jailbreak. Although the project is still knee deep in its development phase, he did allow us to go hands on with some of his work. Today, with the help of winocm, I was able to install Cydia on my iPhone 4S running 6.1.3. If we're ever going to see a proper tool released for the iOS 6.1.3 jailbreak, he just could be the developer to do so.
Yes, we have video of Cydia running on my iPhone 4S, and yes it's legit. Although he has asked us not to speak about the process involved in getting a working Cydia on my 4S, I was there and watched him perform the process from start to finish. In other words, I can vouch for the Cydia install, and I can certainly vouch for video's legitimacy. Have a look...