ZTE Axon 7 A2017G - Manual (Page 11)

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CAUTION:
To avoid damage to the phone, please do not
use other kinds of nano-SIM cards, and do not
use a non-standard nano-SIM card cut from a
SIM card. You can get the standard nano-SIM
card from your service provider.
Charging the Battery
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 cables.
The use of unapproved accessories could
damage your phone or cause the battery to
explode.
CAUTION:
Do not change the built-in rechargeable
battery in your phone by yourself. The
battery can only be changed by ZTE or ZTE
authorised service provider.
1. Connect the adapter to the charging jack.
Ensure that the adapter is inserted in the
correct direction.