A month of so ago I had this really clever idea that I'd update the firmware on my Sony Ericsson K750i mobile phone to try and resolve the joystick problems and the poor picture quality in low light conditions — both of which the upgrade should fix I believe.

Anyway, off I popped to the Sony Ericsson website and downloaded the Sony Ericsson Update Service (SEUS) software and followed the instructions.

All seemed to go well. Until, that is, I tried to use the camera. Doh! I was presented with this error message.

Wrong camera driver version (0.9). Please update camera driver to 4.5 or later.

Attempts to re-flash the firmware were met with the message saying that the software was "up to date" but I could continue anyway. I did. It made no difference...

Searching Google produced lots of pages complaining about the same error (click the link above). Finally I found one that suggested an answer (I'm buggered if I can remember which site it was or find it again though!). So I'm going to document it here.

Firstly back up your contacts either to the SIM or synchronise them with Outlook etc. and back up the pictures in the phone memory using the Sony Ericsson PC Suite software.

Secondly, Under Settings, General, select Master Reset. You will receive warnings about losing contacts and pictures etc.

Thirdly(?), Run the Sony Ericsson Update Service again. It will claim the software is up to date but continue anyway. This time it will work.

Finally, restore your contacts and any pictures you require and you should be up and running again.