350 dpi i think is to low for the device , for me 420 is ok but at this time am using exposed with a module name plak http://repo.xposed.info/module/hello.dcsms.plak and you can do a lot of thinks .
Also see the module miui tweaks ....of curse you need to have exposed installed .
Thank you for the suggestion. Just tried Xposed & PLAK but cannot get rid of icon display problems. If density is less than 380, some icons are still not shown. Additionally, Photos icon always overlap its neighbors.
This post was edited by emuzychenko at 21:13, May-09-2016
Found that standard Android Activity Manager (am) command (http://developer.android.com/tools/help/shell.html#am) supports display-size and display-density parameters, they work on my old Zopo C2 with Android 4.2.1. But in MIUI 7 (and maybe other versions too), am does not support these commands.