Be careful with your money. I'm still not convinced this is real. Neither are others:
https://old.reddit.com/r/dumbphones/comments/198y1xi/minimal...
https://old.reddit.com/r/TheMinimalCompany/comments/1aoq90q/...
https://www.blackhatworld.com/seo/my-company-got-funded-mill...
and
https://old.reddit.com/r/eink/comments/1b35fuz/please_exerci...