Apparently some iPhone users are experiencing some difficulty with v1.1.3 firmware such as SMS text message ordering issues, and Bluetooth connection problems. Well there are whispers that new v1.1.4 firmware fixes the Bluetooth bug and also the SMS problem, so hopefully you won’t be answering a friend’s text message before they’ve even sent you the question.

Also the new firmware seems to have given signal reception a little boost as users have reported weaker signal strength when updating to v1.1.3 firmware, however the new v1.1.4 firmware should drag signal reception back to the norm.

Source — iphoneatlas