Samsung SM-G386TZKATMB - Manual (Page 10)

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Step 5. Replace the Back Cover
● To ensure the back cover is firmly sealed,
position the battery cover over the battery
compartment and securely press down until
you hear a click.
Step 6. Charging the Device
● Before turning on your device, charge it fully.
Be sure to use the charger that came with
the device.
Important! Verify that the battery is installed prior
to connecting the wall charger. If both
the wall charger is connected and the
battery is not installed, the handset will
power cycle continuously and prevent
proper operation. Failure to unplug
the wall charger before you remove
the battery, can cause the device to
become damaged.