I have a couple of questions... I have 3 K550i at home, so if I bought or get 1 of these codes, will it work for all the other 2, or do I have to get 1 per phone? Or is it better if I use the SE Tool? Let me know, thanks, by the way, my phones are not locked to a US Company, they are to a Non-US company, let me know,t hank you very much and if I can use the same code for the same model, can someone lend me 1 code for a K550i at least>? THANKS!