I do not wish to use Google's Messages anymore. I've come across QKSMS, but I feel like I'm losing some features with their premium service. I've tried looking for the default AOSP app, but they're not available anywhere on GitHub, which makes it really hard to update periodically via Obtanium. I'd love to see apps similar to "Material Files" by zhanghai - which is almost similar to the AOSP File manager. I was also considering Signal, but I don't appreciate the fact that I'm supposed to provide a phone number.

Ps. I'd also appreciate contacts and dialer alternatives.