If you update to iOS 8.1.3 now then you can't jailbreak anymore. So stay away from the iOS 8.1.3 update for now. If you don't care about the jailbreak then you can go ahead and update. I would say it's worth to stay in iOS 8.1.2 right now. I can't imaging my iPhone without all the cool features of Cydia. I will stay in iOS 8.1.2 and enjoy the jailbreak.
The latest iOS 8.2 beta 4 is also cool. It's 3x faster than the iOS 8.1.3 also. The battery performance is much better and quite fast as well. It doesn't have any wifi problems. If you are interested then you can also update to any iOS Beta versions by registering your iPhone iPad iPod to Apple Developer Account. Which will give you legitimately access get updated and activated into All iOS beta's.
if you have updated to iOS 8.1.3 by mistake then do ahead and downgrade now to iOS 8.1.2. We are making the iOS downgrade video. We will released it into our youtube channel within few hours. So stay tuned an subscribe to our youtube channel bellow, and as soon as we get any update on iOS 8.1.3 jailbreak we will keep you updated:
We also offer iPhone Factory Unlock service, iPhone Carrier check service and we also register iPhone,iPad,iPod udid to Apple Developer Program for installing latest ios 8.x.x beta.