Originally Posted by datomm
OK, thank you. Will try that and report.
After a lot of trying, I finally managed to install the NULL_13 rom on the gear.
The last step of flashing the rom in recovery mode was especially difficult, since windows suddenly did
not recognize the watch like before, but only a Samung Android device and the driver did not work.
I had to switch to MacOS to use "adb push ..". That worked.
Thanks for all the hints.