![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 QuietComfort 35: Firmware-Update soll ANC-Qualität doch nicht beeinträchtigt haben - Notebookcheck.com News Bose QuietComfort 35: Firmware-Update soll ANC-Qualität doch nicht beeinträchtigt haben - Notebookcheck.com News](https://www.notebookcheck.com/fileadmin/Notebooks/News/_nc3/Bose.jpg)
Bose QuietComfort 35: Firmware-Update soll ANC-Qualität doch nicht beeinträchtigt haben - Notebookcheck.com News
![Amazon.com: Bose QuietComfort 35 (Series II) Wireless Headphones, Noise Cancelling - Silver (Renewed) : Electronics Amazon.com: Bose QuietComfort 35 (Series II) Wireless Headphones, Noise Cancelling - Silver (Renewed) : Electronics](https://m.media-amazon.com/images/I/71o53boVN6L._AC_UF894,1000_QL80_.jpg)
Amazon.com: Bose QuietComfort 35 (Series II) Wireless Headphones, Noise Cancelling - Silver (Renewed) : Electronics
![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)
Original QC35 still on 2.5.5, should I upgrade? Did they fix the ANC problem with the new firmware? : r/bose
![Bose fends off claims 'noise cancellation-breaking' firmware update was intended for sly sales boost | ZDNET Bose fends off claims 'noise cancellation-breaking' firmware update was intended for sly sales boost | ZDNET](https://www.zdnet.com/a/img/resize/2243cdc984b1284da258113168c160621d6ec554/2019/07/24/771da80a-48a5-42a5-93f9-5f0801c9ba5d/bose-headphones.jpg?auto=webp&fit=crop&height=1200&width=1200)