As Reece said there’s no technical real fix to a iCloud locked board as Apple will always see the S/N as locked. However if you really need it to work you can use a tool called Checkra1n then pay to get service working as well as being untethered. The service is called sonick14, keep in mind if you restore the phone with a computer it will become ic locked again.
Error 4013 is cause by a misbehaving NAND or just flat out faulty NAND. First I would try other tools before you declare this phone bricked. Like try to use 3u tools or something like that. Typically if a device can’t leave DFU mode then the logic board needs to be repaired.
Have you tried changing the wifi antenna in the MacBook? Also is there any corrosion or bent pins in the airport card slot. Maybe try to use a wifi card from a 2010 iMac. Because it works with my a1260 MacBook Pro and it’s not by Broadcom. But you may need to update Mac OS since it’s a newer wifi card Hope this Helps,
When does the iPhone get hot? Also did you put the right screws in the right holes? Because long screw damage can do some weird stuff. Is all the flex cables properly seated in the connectors? Good luck, From Ronan
An 860 evo or any hard drive or ssd should work fine since it’s a standard sata interface. Also the 2011 MacBook pros have sata 3 so everything should be compatible. And to clone a Mac hard drive I would get sata to USB. Also if you want to cloan the Hard drive on to the ssd use an app called Super Duper it makes it easy to transfer all of your data Hope this Helps, Ronan
Ok first step I would try is restoring via iTunes it could be software. If it isn’t it’s going to be hardware. So either the home button went bad or the cable that connects Touch ID to the motherboard is bad. And finally one of the connectors may have popped out, but that’s uncommon . Hope this helps