I can attest to Nokia's older smartphones being extremely easy to work on. I had a N8 till about 2 months ago. With 2 screwdrivers (Cant recall atm but it was either a t4 and t5 or a t5 and t6) I could completely tear it down and replace just about anything I wanted to in about 2 minutes. Charge port gone bad? No need to solder a new one in place just drop a new one in place. That phone was awesome to work on.

I have yet to dig into my 1020 seeing as it is still under warranty.