don't know who you mean by 'they' but the people at
www.omega-networks.net do tell you, in fact you fill in an on line
form which asks you info about your phone (read from behind the
battery) and they *send* you the firmware update that's suitable for
the phone.

I'd never done it (firmware upgrade) before but found it pretty
straightforward, the on line help was crystal clear.

hth

Please reply to newsgroup - it's not my address in the header!