Does anyone have a solution for Windows mobile?
No, not at the moment.
We’re working on bringing delta chat desktop to work on windows, not on an app for the mobile version of windows though.
Maybe there are android emulators for windows phones, or one can somehow flash a full android onto a windows mobile phone, I don’t know.
Besides that you maybe want to start a windows client with delta chat core https://c.delta.chat/ .
But be aware that you might not be able to compile delta-chat core yet, we work on a solution:
https://github.com/deltachat/deltachat-core/issues/306