Why does the map transfer freeze then fail after several seconds delay?
A. There appears to be a bug the the handsets firmware which occasionally causes it to crash. The bug seems to be provoked by the order in which a particular selection of tiles are transferred, so retrying the transfer often fails in exactly the same way. The handset may sometimes get so confused that it will no longer respond to the keypad or even the power button and it may be necessary to remove and replace the battery to in order to recover.