... and I strike again

Friday 06 April 2007 at 11:50 pm After getting netmonitor mode working on my old nokia phone, I remember about the field test on Motorola phones.

Make some seem edits - (0032_0001 - offset 44 bits 4,5,6,7 on).

Then hexedit the two menu files - I replaced the Connections option in the main menu (it's doubled up by settings->connections anyway). Reboot the phone...

and all hell breaks loose. The "Personalize" menu is attached where the main menu should be, the key mappings are wrong, and the icons are all wrong in the main menu itself.

The menu file is a binary file. A few bytes of menu info, then the menu item name, then a bunch of nulls out to the next one.

The problem being the last byte of the menu data just happens to be "A" in ascii. Don't overwrite this with the menu name.

I should mention that the field test menu is named FEM.

So after changing that item (use overwrite mode), and covering the excess characters with nulls, reboot the phone. Hmm, no hell breaking loose this time. And I see a test mode icon.

... but... it doesnt work. It opens the connections menu.

Hmmm, according to the notes on the seem edit we did before, it should add a menu item to the tools menu.

Same editing procedure, further down the file. I replaced "alarm clock" - I've got much better devices to use for that, and apparently it's buggy.

Reboot the phone again. Go into the tools menu, test mode is there. And now it actually launches the test mode menu.

Turn test mode visibility on here, and you will see black text on white cover the phone screen.

Exit and enter by pressing the centre button of the 5-way selector and the top left key in quick succession.

Press the up/down keys to change screens.

I'll do pictures tomorrow when I've got another camera besides the phone itself...