Also remember to check the front and make sure any tape you applied is not covering the button. Doh!
Hair dryer - 1 minute until it’s hot like a fresh mug of coffee. Then as soon as you see the smallest gap, insert a razor blade above the phones jack, I needed to slide it towards the charge port and back. Once it slips in keep it there and use your spudger to enlarge the gap and slide it along the corners.