Zte Z718TL User Manual page 16

To avoid damage to the phone, do not use any other kind of SIM
cards, or any non-standard micro-SIM card cut from a SIM card.
You can get a standard micro-SIM card from your service
provider.
1. Insert your fingernail into the bottom left corner of the back
cover and lift it up gently.
2. Hold the microSDHC card with the cut corner oriented as
shown and slip it into the card slot.
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