Translations:FAQ/25/en
From Olekdia Wiki
Reminders don't work properly. What can I do?
Usually it is the problem of some Chinese vendors, as they modify some standard Android services. It's next to impossible for for the developers, to cope with those "improvising". Please search for the possible ways to fix this problem for your device it in the internet.
If you have Xiaomi Redmi Note 3, here's the solution for you: http://en.miui.com/thread-223704-1-1.html