Some of us have Sony SmartWatch 3 and because sometimes the update for our watch have delay, here is step by step guide to upgrade our watch with OTA zip packages. It work for every Android Wear device, but you need specific zip package. I test all steps with my own Sony SmartWatch 3. If you have any questions, just ask.
1. download OTA package (you need to find specific URL for your device)
2. download and install ADB http://developer.android.com/tools/help/adb.html
3. enable developer options on your Android Wear Device and enable USB debugging (tap more times on your software version in your device)
4. connect your device to computer and install correct drivers from Google - http://developer.android.com/sdk/win-usb.html
5. put your downloaded OTA ZIP into ADB folder and get it some easy name (like update.zip)
6. open command line and type adb devices, if result is some kind of number, than go for point 7. If not, you have no driver installed or no USB debuging enable
7. type adb reboot recovery
8. your device will reboot and after you see green Android, tap on display
9. go to apply update from ADB (in your device)
10. typ adb sideload update.zip (if it doesn work, now you have to install drivers once more in device manager)
11. wait until proces finished, you complete firmware update

1. download OTA package (you need to find specific URL for your device)
2. download and install ADB http://developer.android.com/tools/help/adb.html
3. enable developer options on your Android Wear Device and enable USB debugging (tap more times on your software version in your device)
4. connect your device to computer and install correct drivers from Google - http://developer.android.com/sdk/win-usb.html
5. put your downloaded OTA ZIP into ADB folder and get it some easy name (like update.zip)
6. open command line and type adb devices, if result is some kind of number, than go for point 7. If not, you have no driver installed or no USB debuging enable
7. type adb reboot recovery
8. your device will reboot and after you see green Android, tap on display
9. go to apply update from ADB (in your device)
10. typ adb sideload update.zip (if it doesn work, now you have to install drivers once more in device manager)
11. wait until proces finished, you complete firmware update