Home

Unofficial documentation for ServiceMode.

What

The RIL Service Mode (ModemServiceMode) app lets the user communicate with the modem's software.

Where

The RIL Service Mode app is preinstalled on Samsung phones as com.sec.android.RilServiceModeApp. It is not available elsewhere.

How

Attempt to call *#0011# in Samsung's Phone app. Before the call button can be pressed, a menu should open.

Why

To diagnose slow data.
To diagnose a loss of data/voice/SMS.
To diagnose low quality voice calls.
To diagnose a high battery usage.
To see what a phone is connected to and which features are used.

Variants

This is by no means an exhaustive list.

For E. The first line has the word Info, but it's not fully uppercase i.e. INFO. Specifically, the first line may be 2G-BASIC Info, Serving Cell Info, LTE-BASIC Info, or NR-BASIC Info.

For S. The first line contains DEBUG INFO. There is one space on the left of most lines, there is then a left margin.

For M. The first line contains HPLMN.