I also posted this to the bose reddit and want to share with everyone here so it might help others.
For those who upgraded to 3.0.3 and found that the NC experience is worst. Please connect your headset to PC/Mac and check for any update.
For me, I upgraded to 3.0.3 via IOS a few months back and I found the experience is worst.
Today, I did a check on my PC and found that my hardware is on 3.0.3 but voice prompt is 1.x.x. So I upgraded the voice prompt to 3.0.3. the NC experience has definitely improved.
Oct 1, 2017
Mar 26, 2019
Thanks for posting and welcome to the Community!
That's a great question you can find out your firmware version for the QuietControl30 headphones on the Connect app by going to Settings> About. The most recent firmware version is 3.0.3.
You can update your headphones by going to btu.Bose.com and following the on-screen instructions, however, you will need a computer and a micro-USB cable.
I hope this helps, should you have any further questions feel free to get in touch.
Zoe C - Community Support
Aug 15, 2019