Welcome to the Small Repair Forum, where we discuss repairability and DIY of common repairs.
If you are considering repairing or replacing a part of your phone, below are a list of the basic tools you will need at the various stages:
Various components in the phone are glued with strong adhesive like the back cover, battery and the display screen.
During disassembly, there are various cables, plastic covers, clips, etc. that need to be lifted or pried open.
You will need an assortment of precision screwdrivers to disassemble different parts. The most common screwdriver needed will be a phillips head or a T20 torx head to a more exotic tri-wing (needed for iPhones)
After the repair, you will need adhesive to seal the phone back up. Commonly a double sided tape can be used for the battery and a liquid adhesive (T-7000) can be used for sealing the display or the back cover.