Notice! This will mostly have a impact and show its difference when your phone is getting hot when doing heavy tasks.
Here's idle temp before.
First thing to do is tear the phone apart...
Take off this weird felt sticker on the IO shield
Take off the IO shield. Its not soldered on and held in by clips.
There's a piece of tape over the internal storage. Remove it.
Cut a square out of the insulation tape for the SoC and Internal storage.
Spread some thermal paste on the IO shield where you cut out the squares.
Put the IO shield back on. Before you put it back on you might want to mark where those squares are on the other side of the shield.
Where you marked the squares on the other side, put some thermal paste.
Reassemble the phone and enjoy!
My temps after!
Thanks to Cody for stock before temps.