K-9 mail still only works with inline PGP though, not with PGP/MIME. K-9 Mail is so close to being the perfect mobile email client IMO. Open source, decent UI, fast, fully featured, but it's half-finished PGP implementation is so frustrating.

Also, APG it's self still lacks a bunch of features, and it seems to have been abandoned.

I want a Firefox OS phone, but until there is an email client which supports PGP, it will be useless to me.

Mobile PGP. So frustrating.