Zte BLADE A510 Quick Start Manual page 9

NOTE:
The two SIM card slots can both support
4G network, but when one SIM card is
using 4G/3G/2G network,while the network
of another SIM card will become 2G only
automatically.
You can change the SIM card referred type
of network manually.
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
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.
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