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
Who really owns your Bose QC35 headphones? - The Road to Silicon Valley
How to downgrade your Bose QuietComfort 35 II from 4.5.2 to 3.1.8 : r/bose