will chainging a iphone's mainboard change the imei ?

[szymon12399]

i have an iphone which i recently lost , reported it to my carrier and they blacklisted it , later that week my friend found it at his house and gave it me back and i wanted to give it back to orange but they said that they didnt want it and i was wondering if i brought a spares/repairs one of ebay and took the mainboard out of that and put it into my iphone , would that work ?

Any help greatly apreciated .
NO THE PHONE ISN'T STOLEN !!!

 

[Thomasjtsi]

If the story pans out as you've described to us... Orange will un-blacklist it.