What does the LED flashing during a firmware update indicate?

- First the white LED is flashing (Delete Flash)
- Then the blue LED is flashing (Activate Tethering / Personal Hotspot)
- Then the white and blue LED are alternately flashing (Download)
- Then the white and blue LED are simultaneously flashing (Installation)
After the update was finished the white LED shines permanently. The blue LED shines permanently as soon the Bluetooth link to smartphone is established again.