Wait for the reset to complete (10–20 seconds). After completion, you will return to the Recovery Menu.
Press and hold the middle button (crown) until the screen goes black and you see the MONTBLANC logo (about 10–15 seconds). Continue holding through any reboot cycles if needed. How to Hard Reset MONTBLANC Summit 2
Scroll to the bottom and tap Disconnect & reset again. Wait for the reset to complete (10–20 seconds)
The watch will now enter Bootloader / Fastboot mode (a black screen with small white text). How to Hard Reset MONTBLANC Summit 2