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
How to fix problems with Bose QuietComfort 35 II - SoundGuys
Did Bose QuietComfort 35 firmware upgrade make headphones sound worse? - CNET
Bose QuietComfort 35 II review: Great sound, meh Google Assistant | Mashable
Updating the software or firmware of your product
Is the Bose QuietComfort 35 II gaming headset any good? – Consumer Outlook
Bose Headphones Only Working in One Ear: Software and Hardware Solutions | Headphonesty
Bose Quietcomfort 35 II vs Bose Quietcomfort 45: The incumbent keeps the throne - Android Authority
Bose QuietComfort 45 review: A great noise-cancelling headphone | TechHive
Bose QuietComfort 35 II/QC35 II Wireless 2018 Review - RTINGS.com
Amazon.com: FULAIM Boom Microphone Cable Compatible with Bose QuietComfort 35 (QC35) & Quiet Comfort 35 II (QC35 II) Headphones with Volume Control & Mute Switch for PC, Laptop, PS4 PS5 Xbox One