I think iodine uses records that wouldn't fit in a single SMS. I'm not sure whether cloudflare supports splitting records over multiple SMS's...
502 karma · joined March 16, 2018
[1] https://lists.zx2c4.com/pipermail/wireguard/2019-March/00404...
You can also PXE boot without an SD card, which may be best for file system durability.
(Disclaimer: I am not associated with the company)