I was able to do this with the iOpener warming pad by microwaving for the suggested 30secs then leaving it on for 10 mins. repeated this process 2 more times for a total of 3 times @ 30 mins and used the suction tool and the picks to get it open. There is a considerable amount of adhesive on the tops and bottoms of the phone. So consider warming the whole phone before doing it.

Note: if you already have a cracked back panel (like me) prior to starting the process, consider getting the replacement as the already cracked panel will crack even more as you are cutting away at the adhesive. Goodluck!