Zte GRAND X Plus User Manual page 15

WARNING!
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 slot at the bottom right of the
back cover and lift it up gently.
2. Hold the micro-SIM card with the cut corner oriented as
shown and slip it into the card holder.
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