dont worry about flashing new nokia mobiles which are not in list
adding phones to list
add a folder to C:\Program Files\Nokia\Phoenix\Products
example:: if you dont have rm-635 2690 phone in list of mxkey just add the folder rm-635 in C:\Program Files\Nokia\Phoenix\Products
and you will get it in mxkey list
adding files to folder
open mxkey
connect the interfarence
select the phone
type the product code in market tabs
click on download
Bookmarks