If you are just trying to repair your personal phone this one time, borrow a soldering iron. Look for "Maker" clubs, in your area, or try a shop teacher, at a local school. If you are wanting to get into electronics as a hobby, or profession, search this forum for threads on this subject; there are many. You might need a Multimeter, too.
Once you have access to an iron and multimeter, we would be glad to talk you through the repair. Look on YouTube for "NASA soldering tutorials."