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Open the back cover.
Lift and remove the battery.
Using a screwdriver (hex T5), unscrew 10 bolts in the frame of the phone.
Lift up the middle frame and disconnect the module connector on the PCB.
Disconnect the connector and remove from the frame the flat cable with the main camera, front (selfie) camera and headphone jack/socket.
Remove the PCB.
The middle frame.
Pry and remove the earpiece (speaker) and vibration motor.
The dislpay module.
Detailed disassembly instructions of Microsoft Lumia 550 RM-1127 in the video, made by our mobile repair & service center:
Senior maintenance service and repair engineer
Disassembling\Repair has easy complexity and takes about 2 minutes in time. Our manual is suitable for all models Microsoft Lumia 550 RM-1127 — Lumia 550 RM-1127 / RM-1128 released for markets in different countries.