How to Fix Update Issues on a Fitbit Charge 2 - Support.com TechSolutions
Amazon.com: FitBit Flex Wireless Activity Plus Sleep Wristband, Blue : Sports & Outdoors
Should I update? : r/fitbit
Did I just brick my Fitbit? Followed instructions for the firmware update, had a full battery and kept it next to my phone. Firmware update failed and now my Fitbit is stuck
The most common Fitbit problems and how to fix them - Android Authority
How to Fix Fitbit Firmware Update Failed Error
Fitbit says 'external forces' caused the damage to Flex 2