GD-77 UPDATE | FIRMWARE V4.3.3 & SOFTWARE V3.1.9

Firmware changes：
1. Adjust contrast.
2. Add contact - add a selection of adding the attribute.
3. Add contact - add a selection of whether to add it as the default contact of the current channel.
4. Existing contact - add a selection of whether to add it as the default contact of the current channel.
5. Fix bug (when upgrade firmware from an old version, the radio cannot transmit or receive ).

CLICK HERE to download.