ZTE T84/Telstra Tough Max - Manual (Page 57)

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EXTERNAL ANTENNA PORT
Your phone provides an external RF antenna port for connecting to
suitable patch leads and antennas. Only used approved ZTE patch leads
as other generic leads can damage your device. The RF port can be
damaged by rough use, excessive force, bending or twisting on the
connector so always take care to insert and remove the connector
correctly and gently.
The phone’s internal antenna connects to the external RF port.
Damage to the RF port can result in the internal antenna being
disconnected which will render your device unusable. Physical damage
to the external RF port is not covered under warranty.
HEADPHONE AND USB CHARGING PORT
The headphone and the USB charging port are both internally
waterproof. If the device is dropped in water it is possible for water to
remain in the socket which may affect your device. In the event of
device submersion, blow or tap any liquid out of the ports and leave in
a warm place to dry for a few hours.