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Registered since

Sep 9, 2018

QC35 II white noise

Hey all.
I bought my QC35 II around 2 weeks ago. Everything was perfect and the noise cancelling was amazing.
Suddenly, I started hearing some very noticeable white noise while NC is on and the NC stopped being so effective (lack of usual pressure noted also). The odd thing is that I didn’t do any update, and still retain the 2.0.1 firmware. The Bose App started downloading new firmware, but I never clicked ok to update.

Any hint regarding what this is due to?