Difference between HFP 1.7 and HFP 1.6?

Question

Can someone please tell me the difference between HFP 1.7 and HFP 1.6 ? I am looking for differences in addition to what already mentioned in Wikipedia. Any link or document would be highly appreciated.

Answer 1

Refer to the official specification overview page.

HFP 1.5 Specification

HFP 1.6 Specification

HFP 1.7 Specification

Answer 2

Version 1.6 adds optional support for wide band speech with the mSBC codec, a 16 kHz monaural configuration of the SBC codec mandated by the A2DP profile. Version 1.7 adds indicator support to report such things as headset battery level.