What does network locked mean?
 

Basically I want to know if a phone which has O2 or Orange logo on the front can be used with a Vodafone SIM card?
I hope this makes sense as I am signed up to Vodafone and always have been regardless of which phone I have owned.
I now have a BB 9000 Bold which is faulty and am putting it right although I need a few spare parts.
I want to buy another one as spares just in case (probably from ebay) which may be for another network. If I get that one working, can I use it for Vodafone even though it may be O2 or other?
Thanks

Re: What does network locked mean?
 

As long as you don't change the main board of the device, you won't have to worry about the network lock.