I own a Jolla Phone

If your Jolla is stuck at boot: connect on Windows/Linux once your device is recognised:

telnet
o 10.42.66.66

Us the menu to reboot/reset device

• https://together.jolla.com/question/22079/howto-all-computer-users-recover-or-reset-a-device-that-is-stuck-in-boot-loop/
• https://developer.toradex.com/knowledge-base/how-to-install-microsoft-rndis-driver-for-windows-7 (same on Windows 10)