Yes, I've re-locked bootloader. Could you also check 'preferred network type', on mine it shows three options: LTE, 3G, 2G? This is strange because the watch is 3G model. Probably, radio firmware should be different, I'm just guessing.
It works but better to avoid it for now. I've bought Watch Urbane 2nd in Poland, it's LG-W200E (3g only) model. I flashed wear 2.0, played a bit but found that it has a lot of small glitches so decided to rollback. I flashed back 6.01, build number mnc40x (nemo-mnc40x-factory-fa528bec.tgz). Now...