![Downgrade your Bose QuietComfort 35 II from any version to 4.3.6, 4.1.3, 3.1.8, 3.1.7, 2.5.1, 2.2.1, 2.2.0, 2.1.3 or 2.0.1 : r/bose Downgrade your Bose QuietComfort 35 II from any version to 4.3.6, 4.1.3, 3.1.8, 3.1.7, 2.5.1, 2.2.1, 2.2.0, 2.1.3 or 2.0.1 : r/bose](https://preview.redd.it/iepygxkmk6q31.png?width=2838&format=png&auto=webp&s=cb2258be55bdcd1407295b16ae012a41a58ff128)
Downgrade your Bose QuietComfort 35 II from any version to 4.3.6, 4.1.3, 3.1.8, 3.1.7, 2.5.1, 2.2.1, 2.2.0, 2.1.3 or 2.0.1 : r/bose
![Bose Service on Twitter: "Quiet Comfort 35 II owners - We've got new firmware for you! 4.8.1 adds Self-Voice and battery level voice prompts, along with other fixes and improvements. Download it Bose Service on Twitter: "Quiet Comfort 35 II owners - We've got new firmware for you! 4.8.1 adds Self-Voice and battery level voice prompts, along with other fixes and improvements. Download it](https://pbs.twimg.com/media/Ej1S9MnWoAQWfmg.png)
Bose Service on Twitter: "Quiet Comfort 35 II owners - We've got new firmware for you! 4.8.1 adds Self-Voice and battery level voice prompts, along with other fixes and improvements. Download it
![Original QC35 still on 2.5.5, should I upgrade? Did they fix the ANC problem with the new firmware? : r/bose Original QC35 still on 2.5.5, should I upgrade? Did they fix the ANC problem with the new firmware? : r/bose](https://i.redd.it/vwol965dwm941.jpg)