The latest version of WatchOS has reportedly come with issues with its heart rate monitoring, with WatchOS 1.0.1 taking less frequent readings than before. For those who use the wareable device for fitness purposes it was no longer performing as intended. As such, users looked for ways to rollback to version 1.0.0, but a lack of Device Firmware Update (DFU) mode made it impossible. This meant that the only way to revert the Apple Watch to a working state was to send the device back to Apple, who would then charge customers for the rollback because it was technically an "out of warranty" repair.
This has led to angry posts on the official forums - with reports of many threads being deleted - and while it is possible that someone could stumble upon the process to access the DFU (which requires a combination of button presses) it is highly unlikely to happen. On top of this, Apple will not want that secret being discovered just yet, so don't expect them to be revealing how to do it any time soon. So, our advice to any Apple Watch users out there is to not update your firmware if you haven't already done so. We'll be sure to keep you updated on the situation as it develops.