iOS 7.1 (build 11D167) is an official Apple over-the-air update for the iPhone 4s, released on 2014-03-10T16:58:42Z. The update package is 186.25 MB. This is a delta (partial) update that requires 7.0.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: b672ff3717f48972a385e70b56b66b0280ad4d7d.zip.