Introduction
This guide will be useful in replacing the side button for the Blackberry RIM 7250. For this guide, you will need a plastic opening tool and a Torx #6 screwdriver head.
Tools
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            Push the release button down and away from the device. 
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            Slide the cover off toward the bottom of the device, revealing the battery compartment. 
 
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            Place your finger in the groove next to the battery. 
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            Lift your finger up to eject the battery from the battery compartment. 
 
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            Hold the phone with one hand, with the bottom facing toward you. 
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            For both clips, insert the plastic opening tool and push away from you. 
 
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            Place your thumb on the bottom rectangle and your index finger on the top rectangle. 
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            Squeeze your fingers together to release the internals from the front housing. 
 
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            Grab side button housing with your thumb and index finger. 
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            Remove the side button housing from the internals. 
 
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            Hold the side button housing with one hand and hold the side button with the other. 
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            Lift the side button from side button housing. 
 
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To reassemble your device, follow these instructions in reverse order.