This will broaden the frequency range reproduced by hands-free devices. The Android OS standard in use dates back to HDP v1.6 and is known in the telephony industry as Wideband. It is designed to cover frequencies ranging from 50Hz to 7 KHz and is also known commercially as HD Voice. mSBC, a special, HFP-specific version of the SBC codec, is used for delivery.
Moving from wireless device to wireless device to wireless network to wireless network will result in a significant improvement in call quality.