Power button stuck ( bootloops on AOSP) topic

My S3 apparently has a power button that is sticking sometimes.

my question is i have my brothers old S3 with a cracked screen in my "junk drawer" i was wondering if i can swap out the entire circuit board that the button is on into my phone? or will that screw up my IMEI and phone number. it seems an easier solution than soldering in a new button.

any insight is greatly appreciate.

thanks