Zte GRAND X4 User Manual page 14

WARNING!
To avoid damage to the phone, do not use any non-standard
nano-SIM card cut from a SIM card. You can get a standard
nano-SIM card from your service provider.
1. Insert the tip of the tray eject tool into the hole on the card tray
on the left side of the phone.
2. Pull out the card tray and place the nano-SIM card (right)
/microSDXC card (left) on the tray with the gold-colored
contacts facing down. Then carefully slide the tray back into
place.
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