Introduction
Use this guide to replace a defective vibration unit in your bq Aquaris M5.
Tools
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            Insert the tip of an iFixit opening tool between the back cover and the mid frame of the phone. 
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            Slide the opening tool to the bottom of the phone, to snap out the plastic clips, connecting the back cover and mid frame. 
 
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            Slide the opening tool back to the top of the phone, to disconnect all the clips on the edge. 
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            Slide around the corner and along the top edge, to also disconnect these clips. 
 
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            Grab the back cover by the loosened edge. 
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            Gently bend and twist the flexible back cover a bit to disconnect the remaining clips. 
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            Take off the back cover. 
 
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            Unscrew the ten black 4mm Phillips #00 Screws from the mainboard shield. 
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            Unscrew the golden 3.4mm Phillips #00 screw on the middle-right side of the mainboard shield. 
 
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            Insert the flat side of a spudger between the mainboard shield and the frame of the phone. 
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            Twist the spudger to lift up the mainboard shield. 
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            Remove the mainboard shield from the phone. 
 
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            Use a spudger to disconnect the battery's flex cable from the mainboard. 
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            Pull of the sticker on the bottom side of the battery. 
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            Grab the sticker and lift it up to take the battery out of the phone. 
 
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            Use an opening tool or your finger nail to open the FPC connector. 
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            Disconnect the FPC connector cable. 
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            Use the tip of a spudger to leverage the camera out of its housing. 
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            Remove the front camera. 
 
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            Use a SIM card eject tool, to eject the two SIM card slots on one side. 
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            Use a SIM card eject tool, to eject the micro SD card slot on the other side. 
 
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            Use the flat end of a spudger to disconnect the flex cable at the top of your the mainboard. 
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            Bend the cable a bit over the edge, so it won't block the mainboard later, when you are taking it out. 
 
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            Insert the flat end of a spudger between the mainboard and the mid frame. 
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            Use the spudger to lever the mainboard. 
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            Take the mainboard out of the phone. 
 
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To reassemble your device, follow these instructions in reverse order.