shadows/framework/src/main/java/org/robolectric/shadows/ShadowTelephonyManager.java
@Implementation(minSdk = Build.VERSION_CODES.Q)
  protected boolean isCurrentEmergencyNumber(String number) {

    if (number == null) {
      return false;
    }

    Context context = ReflectionHelpers.getField(realTelephonyManager, "mContext");
    Locale locale = context == null ? null : context.getResources().getConfiguration().locale;
    String defaultCountryIso = locale == null ? null : locale.getCountry();

    int slotId = -1;
    boolean useExactMatch = true;

    // retrieve the list of emergency numbers
    // check read-write ecclist property first
    String ecclist = (slotId <= 0) ? "ril.ecclist" : ("ril.ecclist" + slotId);

    String emergencyNumbers = SystemProperties.get(ecclist, "");

    if (TextUtils.isEmpty(emergencyNumbers)) {
      // then read-only ecclist property since old RIL only uses this
      emergencyNumbers = SystemProperties.get("ro.ril.ecclist");
    }

    if (!TextUtils.isEmpty(emergencyNumbers)) {
      // searches through the comma-separated list for a match,
      // return true if one is found.
      for (String emergencyNum : emergencyNumbers.split(",")) {
        // It is not possible to append additional digits to an emergency number to dial
        // the number in Brazil - it won't connect.
        if (useExactMatch || "BR".equalsIgnoreCase(defaultCountryIso)) {
          if (number.equals(emergencyNum)) {
            return true;
          }
        } else {
          if (number.startsWith(emergencyNum)) {
            return true;
          }
        }
      }
      // no matches found against the list!
      return false;
    }

    emergencyNumbers = ((slotId < 0) ? "112,911,000,08,110,118,119,999" : "112,911");
    for (String emergencyNum : emergencyNumbers.split(",")) {
      if (useExactMatch) {
        if (number.equals(emergencyNum)) {
          return true;
        }
      } else {
        if (number.startsWith(emergencyNum)) {
          return true;
        }
      }
    }


    return false;
  }
@Implementation(minSdk = Build.VERSION_CODES.Q)
  protected boolean isCurrentEmergencyNumber(String number) {

    if (number == null) {
      return false;
    }

    Context context = ReflectionHelpers.getField(realTelephonyManager, "mContext");
    Locale locale = context == null ? null : context.getResources().getConfiguration().locale;
    String defaultCountryIso = locale == null ? null : locale.getCountry();

    int slotId = -1;
    boolean useExactMatch = true;

    // retrieve the list of emergency numbers
    // check read-write ecclist property first
    String ecclist = (slotId <= 0) ? "ril.ecclist" : ("ril.ecclist" + slotId);

    String emergencyNumbers = SystemProperties.get(ecclist, "");

    if (TextUtils.isEmpty(emergencyNumbers)) {
      // then read-only ecclist property since old RIL only uses this
      emergencyNumbers = SystemProperties.get("ro.ril.ecclist");
    }

    if (!TextUtils.isEmpty(emergencyNumbers)) {
      // searches through the comma-separated list for a match,
      // return true if one is found.
      for (String emergencyNum : emergencyNumbers.split(",")) {
        // It is not possible to append additional digits to an emergency number to dial
        // the number in Brazil - it won't connect.
        if (useExactMatch || "BR".equalsIgnoreCase(defaultCountryIso)) {
          if (number.equals(emergencyNum)) {
            return true;
          }
        } else {
          if (number.startsWith(emergencyNum)) {
            return true;
          }
        }
      }
      // no matches found against the list!
      return false;
    }

    emergencyNumbers = ((slotId < 0) ? "112,911,000,08,110,118,119,999" : "112,911");
    for (String emergencyNum : emergencyNumbers.split(",")) {
      if (useExactMatch) {
        if (number.equals(emergencyNum)) {
          return true;
        }
      } else {
        if (number.startsWith(emergencyNum)) {
          return true;
        }
      }
    }


    return false;
  }
Cribbed from {@link android.telephony.PhoneNumberUtils#isEmergencyNumberInternal}.

TODO(b/122324733) need better implementation