Open the back cover.
Disassembly/Repair of the mobile device Microsoft Lumia 640 DS RM-1077 (Lumia RM-1077) with each step description and the required set of tools.
Pry and remove the middle frame.
It is necessary to separate it carefully. Because of the inter-board cable that goes from the module to the connector on the PCB. The board locates in the middle frame.
Detailed disassembly instructions of Microsoft Lumia 640 DS RM-1077 in the video, made by our mobile repair & service center:
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