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I'm no expert, but based on my experience I would guess either the new cable or the new port (or both) took you to USB 2. USB 3 seems really finicky with this stuff. I now use USB 2 exclusively and have no problems.

So I was impatient and bought a generic USB-A to USB-C cable which allowed be to unlock and flash; joy! I have no idea what makes this cable/setup different (except the other cable was USB-C to USB-C, and I now have to use a different USB port), but if there is any interrest I can buy another one and dissect it to get some photos/data. Thanks all for the input and time! Arn

I get best results when using a Raspberry Pi3 for flashing the Pro1. I had lots of trouble using my normal PCs as well, even though some of them are old pure-USB-2.0 systems. The RPi has a 100% success record up to now. The cable then does not seem to matter much: I have successfully used, both, the official one and some random spare I had lying around. If you have a Raspberry at hand anyway (), just give it a try. The needed Android tools are just an "apt install adb fastboot" away. Edit: Note that the fact that my RPi is version 3 may be important. The Pi3 is the latest versi

Many other factors could affect this (unfortunately), so no easy dead sure answer. Sometimes a different port (even on the same PC) can make a difference. And some have reported that using a hub might help, and others that not using a hub helped... The driver on the PC for the port also matters... so I would say the best to do is to experiment, including other cables and perhaps other pc's. It is not that it is hard to get it working, but when it isn't working, it can be hard to figure out the why. 😖 I have it working fine even with fairly cheap Chinese usb-cables on an ancient Lenovo th

Well then I'm your buyer. :O

Not strictly a phone, but the Dragonbox Pyra that is made by our forum member @EvilDragondoes have a SIM slot, too. The German IT news channel golem.de features an interview with him today: https://www.golem.de/news/dragonbox-pyra-macher-im-interview-die-linux-spielekonsole-aus-deutschland-2106-157004.html (Golem's adblocker protection breaks direct Google Translate support, but it should be easily translatable by copy-and-paste to Google Translate or, better. DeepL.com...)