Disappointed to report that as of 9/4/2018 Waze is still NOT working on the UMIDIGI A1 Pro. Does NOT work installed in either Internal or adoptable External SD Memory. Waze is part of Google and the best GPS navigation App. Is someone from UMIDIGI investigating?
After the V2.0 Update, the Waze GPS App appears to be working.
Waze was difficult and very s-l-o-w to install.
But once installed it seems to work!
Best news is that although Waze uses 111 MB of storage, it's adoptable memory on my SD card.