We don't do as much as we used to...but before you start soldering away--you have to get your ducks in a row.
1. Get someone that has done electronic circuit board soldering before.
2. Get a well-lit bench or table with a magnifying glass/light, a desoldering tool, a good soldering iron with the right sized tip, and the right kind of solder. There might be some other things that your soldering guy wants to have on hand, also.
We have had that situation in our shop for the last 10 years or so...we invested in a Haako desoldering station. It really makes a difference. When you can desolder correctly, then the items that are soldered back in the holes really make good connections then and the job goes alot faster, too.
However, by the time you do all of that, you're better off if you just purchased good, refurbed phones. Every year, we do less and less soldering.
But, some people like projects and this one is at least fun to do. Won't really make you any money what with the time, aggravation, and money spent---but what the heck. Good luck.
