Optimum Teco guides - Bose QC35 noise cancelling was gimped by recent software update, claim owners Both generations of Bose's QuietComfort 35 headphones have long been some of the most popular noise-cancelling
![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/192519011d8f3dad67e0fa6e643c9242f286e4a6/2019/07/24/771da80a-48a5-42a5-93f9-5f0801c9ba5d/bose-headphones.jpg?width=1200&height=1200&fit=crop&auto=webp)
Bose fends off claims 'noise cancellation-breaking' firmware update was intended for sly sales boost | ZDNet
![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 disproves conspiracy theories regarding reduced noise canceling performance with QC 35 II update - GSMArena.com news Bose disproves conspiracy theories regarding reduced noise canceling performance with QC 35 II update - GSMArena.com news](https://fdn.gsmarena.com/imgroot/news/20/04/bose-update/-535/gsmarena_002.jpg)
Bose disproves conspiracy theories regarding reduced noise canceling performance with QC 35 II update - GSMArena.com news
![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 Bose QuietComfort 35 Noise Canceling Wireless Headphones II (Black) 2022 | Buy Bose Online | ZALORA Hong Kong Bose Bose QuietComfort 35 Noise Canceling Wireless Headphones II (Black) 2022 | Buy Bose Online | ZALORA Hong Kong](https://dynamic.zacdn.com/UlUy5KSRWRYUnXTMWisj7KxoSRg=/fit-in/346x500/filters:quality(95):fill(ffffff)/https://static-hk.zacdn.com/p/bose-8529-6820185-1.jpg)