There are some unanswered questions in answershub which would benefit of knowing the splashscreen support:
I cross-post this in order to get more visibility, since people might not been noticed this (I didn’t)
https://answers.unrealengine.com/questions/134814/android-black-screen-of-death-ie-no-splash-screen.html
https://answers.unrealengine.com/questions/133599/mobile-splashscreen-while-engine-starting.html