Apple has just bomb dropped iOS 6.1.4 for GSM and CDMA iPhone 5s. This is obviously an incremental update and there’s not much that it brings. The official changelog says that iOS 6.1.4 brings an updated audio profile for speakerphone. That’s it. Not even the ‘obligatory’ bug fixes.
Jailbreakers should avoid this update at any cost. If you update your phone you can kiss your jailbreak goodbye until the next major release which is iOS 7. But most probably somehwere between 7.0 and 7.1. So it’s going to be a while….