phone is locked?

A friend of mine gave me a Nextel i830 phone. The phone is disconnected and has not been used but the phone is locked. I guess I have the wrong definition to unlocking a phone, but is there a certain code to type in? It also asks for the security code. The unlock code is 4 digits but the security code is I think 5 or 6. So is there a universal unlock code, or do i need to take it to the store?

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yeah id take it to the store, whatever u do dont attempt to put in a code cause if u guess it to manyt times the sim card will lock forever.

or if you get the CP from the phone and post it I can get the code for you....

what is the CP? and where is it located?

CP = codeplug, you will need RSS and a USB or serial cable to connect your phone to the comp.Then use RSS to extract the CP from the phone. Its a little more indept then I just explained but if you search online you will figure it all out.

If you search this site, you will find THIS thread which explains in detail how to get your CP.