Introduction
The speaker is an important component of the Nokia Lumia 900. Because it is a small component that is housed beneath many different parts, this guide will show how to remove it carefully and properly.
Tools
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            Insert the pointed end of the spudger into the sim card port indicated by the picture. Then proceed to remove the sim card port entirely. 
 
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            Separate the screen from the motherboard by prying it open with the spudger along with pulling upwards with the suction cup. 
 
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            Gently pull apart the screen from the motherboard, with only the ribbons connected from the motherboard to the screen. 
 
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            Disconnect the No-fuss cables from the motherboard by gently prying them up using the flat end of the black stick spudger. Make sure not to bend or crease the cable. 
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            Remove the screen. 
 
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            Use the iFixit iOpener or another heat source to gently heat the top left corner until the adhesive under the camera softens. 
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            Use the plastic opening tools to carefully lift the front camera from the motherboard. 
 
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            Use the flat end of a spudger to lift the metal backplate from the casing. 
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            Be sure not to lose the buttons. 
 
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            Wedge the pointed end of the spudger into the gaps in the antenna housing and pull the antenna housing away from the casing walls. 
 
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            Insert the pointed end of the spudger into the hole and slide the speaker housing out from the casing. 
 
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To reassemble your device, follow these instructions in reverse order.