![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 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/-727/gsmarena_001.jpg)
Bose disproves conspiracy theories regarding reduced noise canceling performance with QC 35 II update - GSMArena.com news
![Tutoriel : Faire un downgrade / rétrograder le firmware du casque Bose QC35 [Valable en Mars 2020] | Chartouni Blog Tutoriel : Faire un downgrade / rétrograder le firmware du casque Bose QC35 [Valable en Mars 2020] | Chartouni Blog](https://www.chartouni.fr/blog/wp-content/uploads/2020/03/download.png)
Tutoriel : Faire un downgrade / rétrograder le firmware du casque Bose QC35 [Valable en Mars 2020] | Chartouni Blog
![Bose permitirá que los poseedores de auriculares Quiet 35 hagan durante un tiempo un downgrade de firmware Bose permitirá que los poseedores de auriculares Quiet 35 hagan durante un tiempo un downgrade de firmware](https://i.blogs.es/889b5f/quiet/450_1000.webp)
Bose permitirá que los poseedores de auriculares Quiet 35 hagan durante un tiempo un downgrade de firmware
![Bose shouts down claims that it borked noise cancellation firmware to sell more headphones • The Register Bose shouts down claims that it borked noise cancellation firmware to sell more headphones • The Register](https://regmedia.co.uk/2020/04/06/bose_qc_ii_anc_headphones.jpg)
Bose shouts down claims that it borked noise cancellation firmware to sell more headphones • The Register
![Tutoriel : Faire un downgrade / rétrograder le firmware du casque Bose QC35 [Valable en Mars 2020] | Chartouni Blog Tutoriel : Faire un downgrade / rétrograder le firmware du casque Bose QC35 [Valable en Mars 2020] | Chartouni Blog](https://www.chartouni.fr/blog/wp-content/uploads/2020/03/Step2.png)