Service mode RIL hidden app. Used for debug and diagnostics dial *#0011# for modem connectivity info, *#9090# for diagnostics control # RIL means Radio Interface Layer. It's the bridge between Android phone framework services and the hardware. https://wladimir-tm4pda.github.io/porting/telephony.html https://stackoverflow.com/questions/11111067/how-does-modem-code-talk-to-android-code Samsung RIL is a add on from Samsung : Modem <=> Linux kernel <=> libsamsung-ipc <=> Samsung-RIL <=> Android framework <=> Android applications
Phones target this application