Zte Blade A31 Plus Quick Start Manual page 8

3. Insert the microSDXC card (optional) into the slot
above the left nano-SIM card slot.
4. Insert the battery, making sure the connectors align.
5. Replace the back cover.
Charging the Phone
Your phone's battery should have enough power for the
phone to turn on, find a signal, and make a few calls. You
should fully charge the battery as soon as possible.
WARNING!
Use only ZTE-approved chargers and USB cables. The
use of unapproved accessories could damage your
phone or cause the battery to explode.
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