private void initializeDeviceName() {
        mDeviceName = Settings.Global.getString(mContext.getContentResolver(),
                Settings.Global.DEVICE_NAME);
        if (mDeviceName == null) {
            mDeviceName = Build.MODEL;
        }
    }

/**
  * The name of the device
  */
 public static final String DEVICE_NAME = "device_name";

private void loadGlobalSettings(SQLiteDatabase db) {
      ......
      loadSetting(stmt, Settings.Global.DEVICE_NAME, getDefaultDeviceName());
    ........
  }
   private String getDefaultDeviceName() {
       return mContext.getResources().getString(R.string.def_device_name_simple, Build.MODEL);
   }

res/values/defaults.xml
<string name="def_device_name_simple">%1$s</string>

/** The end-user-visible name for the end product. */
  public static final String MODEL = getString("ro.product.model");

sl8541e_1h10_32b/sl8541e_1h10_32b_Natv.mk 
-PRODUCT_MODEL := sl8541e_1h10_32b_Natv
+PRODUCT_MODEL := FT11

public static String getDeviceModel() {
        FutureTask<String> msvSuffixTask = new FutureTask<>(() -> DeviceInfoUtils.getMsvSuffix());
        msvSuffixTask.run();
        try {
            // Wait for msv suffix value.
            final String msvSuffix = msvSuffixTask.get();
            return Build.MODEL + msvSuffix;
        } catch (ExecutionException e) {
            Log.e(TAG, "Execution error, so we only show model name");
        } catch (InterruptedException e) {
            Log.e(TAG, "Interruption error, so we only show model name");
        }
        // If we can't get an msv suffix value successfully,
        // it's better to return model name.
        return Build.MODEL;
    }

private static final String FILENAME_MSV = "/sys/board_properties/soc/msv";
   public static String getMsvSuffix() {
       // Production devices should have a non-zero value. If we can't read it, assume it's a
       // production device so that we don't accidentally show that it's an ENGINEERING device.
       try {
           String msv = readLine(FILENAME_MSV);
           // Parse as a hex number. If it evaluates to a zero, then it's an engineering build.
           if (Long.parseLong(msv, 16) == 0) {
               return " (ENGINEERING)";
           }
       } catch (IOException|NumberFormatException e) {
           // Fail quietly, as the file may not exist on some devices, or may be unreadable
       }
       return "";
   }
  private static String readLine(String filename) throws IOException {
      BufferedReader reader = new BufferedReader(new FileReader(filename), 256);
      try {
          return reader.readLine();
      } finally {
          reader.close();
      }
  }

public CharSequence getSummary() {
      return BidiFormatter.getInstance().unicodeWrap(Build.DISPLAY);
  }

/** A build ID string meant for displaying to the user */
   public static final String DISPLAY = getString("ro.build.display.id");