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I have an iphone 4 the by mistake is broke the battery conector and i noticed that i have 2 missing soldering plates!! Iam using ifixit for 3 years for repairing and i want to move to the next level. The problem is that iam new to the soldering world and i want to start somewhere. I want to know everything about the soldering techniques, type of soldering wires,bridges(what is that?),the idle soldering temperature etc!! Tnx alot guys

areotov, check the videos on here and on here as well. As for your other question, check on here. If you have not done this before, remember to practice soldering first. It is not as easy as it looks. Hope this helps, good luck.