This chapter focuses on practical disassembly and assembly of Iphone screens, including hot-dismantling (for OLED screens) and cold-dismantling (for LCD screens) methods. It covers step-by-step operations: heating the screen edge to soften the adhesive, safely separating the screen with a suction cup, disconnecting the screen flex cable connector, and removing the screen. It also teaches standard assembly processes, such as cleaning the frame, applying new adhesive, and aligning the screen for installation. Learners will grasp the key points of avoiding flex cable damage and ensuring tight screen fitting.