SIM not valid for Iphone 3

My iphone broke so my brother gave me a used one that was on the Rogers network that his friend didn't use anymore, I'm under contract with Telus, I put my SIM card in the phone and brought it back to factory settings and then it says SIM not valid. What can I do to fix this so I can use the phone?

Its not jailbroken you neex to jailbreak it so you can use other carriers

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