: Some methods require a custom wired USB connection made by modifying a charger, while others use "Download Wireless" mode. of the firmware, or are you trying to fix a bricked device Full Firmware For Device Gear S2 SM-R720
The most reliable source for step-by-step guides and links to "combination firmware" used to recover bricked devices. How to Install (NetEase / Odin) Samsung Gear S2 Sm-r720 Firmware Download
Ensure your Gear S2 has at least 70% battery capacity. : Some methods require a custom wired USB