So what resolution I should use to develop for android and how to set up it in UE4?
Howdy BKremnev,
I am unsure what phone or tablet you are currently attempting to deploy to but you can find some of the most common screen resolutions here: Loading...
Also, to set it up in UE4, You are going to have to go into the BaseDeviceProfiles.ini in the Engine/Config for examples. Here is Document on that part of the question: Setting Up Device Profiles in Unreal Engine | Unreal Engine Documentation
Let me know if this helps you with your issue. Thanks and have a great day!
Just found this as well in the Window drop down menu in the window, located at the top of the screen, There is a section called device profile editor that may also be helpful with resolution.