![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/376e3e37261628b184a1f365cbd1dba89e984d9a/2019/07/05/4c901622-e48e-4baf-910f-ef6d4cd1b3b9/bose-glasses.jpg?auto=webp&fit=cover&height=482&width=856)
Bose fends off claims 'noise cancellation-breaking' firmware update was intended for sly sales boost | ZDNet
![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
![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/c059c0a5f787825ebd735ed8175af7a44bb91151/2019/07/24/771da80a-48a5-42a5-93f9-5f0801c9ba5d/bose-headphones.jpg?width=1200&height=900&fit=crop&auto=webp)