How I can support Unicode on Android 5.1?

[Nezzaros]

Hi. I've a Doogee F5 that support until Unicode 6.1 (I see this emoji on the site of unicode.
So, how I can support until unicode 10.0? In the notification bar I see a blank square.

Thanks a lot.

9/ Latest firmware, low volume and very bad battery life.
build number gra l09c432b317

im getting about half of the battery life i got before even with data and gps off.

also ear phone volume for music is very low.