When MR v2 unzipped, I found base.apk (49 KB) in data/app/com.huawei.pmplus-1, but it seems to be the same as com.huawei.pmplus-1.apk I found/downloaded earlier. from XDA Mate forumHello
Thanks for testing and reporting!
If you haven't deleted MR v2 zip, you can find inside in data/app PMPlus apk
But if this also does not work, there's no more chance to get it to work on b391. There's no download of newer version available
PMPlus does not require Root.
Perhaps it will work on MR v3, because it comes preinstalled (I have to test)
Installation fails, complaining to be in conflict with a package of the same name - but looking into Settings/Apps (System Processes) I don't see anything like PMPlus in v391 (btw, I did rollback plus hard reset on unlocking Bootloader for b391, hence I could not have anything remaining from MR v2) - strange, never mind, thanks