تماشای ویدئو How to change Signal icons on Android mobile Almost از آی-ویدئو
do u want to edit system ui to change signal icons... ?!! here is a simple tutorial..
the links for signal icons... (u need to extract this zip file )
https://www.dropbox.com/sh/7p878gne7ey4k2a/AACFCTSUphGsXnG_rR6fObIYa?dl=0