Introduction
The MicroSD card is one of the most common replacements for the ZenFone 5, and luckily, one of the easiest. The only tool required is a pin to fit in a small hole on the phone. If you do not have an advanced toolkit, some common household objects can also work, such as a thumbtack, needle, etc.
Tools
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            If you have a case, remove it so you can see the sides of the phone. 
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            The slot for the MicroSD card, with the screen facing up, is on the left edge with a small hole. 
 
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            Use your safety pin (or any tool with a small pin) to press into the hole until you feel a button being pressed. 
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            Pull the pin out of the slot and the cartridge will come with. 
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            Gently take out the MicroSD card. 
 
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                            Conclusion
                          
                          To reassemble your device, follow these instructions in reverse order.
The second step here is a little unclear. Can you clarify?
Alex Watkins -