I was interested in them but all the listings on AliExpress expressly said they didn’t support custom firmware. I started looking into it and it seems to be something theu did after they got popular.
Here’s some info, but a lot of it is scattered around online communities: https://pocketink.io/blog/xteink-locked-or-unlocked-buying-guide/
But XTEINK is actively working to combat the flashing of open source software. It seems they had a spike in sales and interest due to their affordable hardware, but if they continue to lock aftermaket software out tech savvy people will be looking for different options.
Update: I just saw that CrossPoint has has an affiliate link, and that if you buy the reader direct from the manufacture you can still get unlocked USB devices. It’s only on the international stores like AliExpress that you may get a crippled version. https://github.com/crosspoint-reader/crosspoint-reader
Update: I just saw that CrossPoint has has an affiliate link, and that if you buy the reader direct from the manufacture you can still get unlocked USB devices. It’s only on the international stores like AliExpress that you may get a crippled version. https://github.com/crosspoint-reader/crosspoint-reader