Hi Does someone have a link to downgrade from v3 firmware for QC35? I just upgraded to v3 (from 2.5 something I think) and now I'm getting no sound from headphones, whether connected to watch, phone or iMac, was working fine this morning before upgrade. The bluetooth connection seems to be OK - ie the devices are recognised and the name of the device is read out by the headphones. Also phone app shows them as connected OK with music playing. Thanks.