Module for system services injection

ServiceModule.java

@Module(
        entryPoints = {
                MyApplication.class,
        }
)
public class ServiceModule {

    private Context mContext;

    public ServiceModule(Context context) {
        mContext = context;
    }

    @Provides @Singleton
    TelephonyManager provideTelephonyManager(){
        return (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE);
    }
}