I tested the alarmmanager2.apk on some of my test devices.
It works on:
- Pixel 2XL (Android 11) → works
- Galaxy Note8 (Android 9) → works
- Xiaomi Redmi Note 5 (Android 9) → works
- Nexus 5x (Android 8.1) → works
- Galaxy A3 (2017) (Android 8.0) → works
- Galaxy S6 (Android 7) → works
- Galaxy Note 3 (Android 5) → works
Does not work on:
-
Xiaomi Redmi Note 5 (Android 9) → doesn't work (also not in foreground)
(EDIT: Notifications were disabled, no idea why) -
Galaxy S6 (Android 7) → doesn't work (also not in foreground)
(EDIT: new test APK works now) -
Galaxy Note 3 (Android 5) → crash (as already reported → date format)
(EDIT: new test APK works now)