Dear Dos, please could you suggest Purism to give to PureOS same Debian number so to avoid confusion?
Do you think it’d be a good idea? 
Thank you
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My sd card on the librem5 just crashed. I used it to outsource flatpak and waydroid from the small sd card. I think I will have to reinstall pureos any day from now. I am now thinking if I might give Crimson but from what I understand LUKS and the GPG-decryption is not yet ready - or am I mistaken? I don’t mind if the rest of the experience is a little beta.
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See here how PureOS versions relate to Debian versions:
https://docs.puri.sm/Software/PureOS/Overview/Compatibility.html?highlight=byzantium%20crimson%20debian#inhereted-compatibility
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Thank you! 
Hope they’ll align the two
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From the OP:
We have both encrypted and plain images
I haven’t verified that but that’s what it says, so it may be worth your while looking into it to see whether that part of it has been checked off.
Edit: Looks as if I got the wrong end of the stick here. Probably disregard this post.
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https://storage.puri.sm/librem5/images/crimson/latest/librem5r4/
does not include the luks image and the last image is from january.
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You are looking at the wrong place. This time you’d have to build your own as images are not provided, by following these steppes: Files · master · PureOS / Infrastructure / pureos-image-recipes · GitLab
There are some limitations, the bottom text (" Not implemented for arm64.") seems to suggest that flash and LUKS are not implemented for L5 (yet).
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i would like to try it 
is there a simple install instruction?
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It’s just that linked page and those instructions. This is still developer level stuff, not for general testing (alpha version etc. comes later).
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