I need a simlock kit for treo600!

So what I want to do is to simlock free treo600 so that the treo600 can only used with one provider!

Please help me where I can buy such kit so that I can simlock the treo.

Or how can I simlock the treo600 without a kit! But the simlock should not be killed when I make a hardreset!

Thanks for help

Sorry for my bad english!