When the firmware starts updating "Downloading Firmware..." is displayed.
When the firmware file has been downloaded into RAM on UIP300,
the checksum calculation starts.
When the checksum calculation has finished, the old firmware is erased
(the second line of the display indicates the sector of the flash being erased).
After the old firmware has been erased, new firmware programming starts
(the percentage of progress is displayed on the second line of the display).
When programming is completed, the following message is displayed and the
telephone restarts automatically.
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