niu Tek 3-5D2, Быстрый старт, Страница: 18 / 19

17
a new battery as battery performance may
decrease after prolonged usage.
SIM Card
Error
Dirt on the metal surface of an SIM card
: Use
clean cloth to wipe the metal touch point on an
SIM card.
The SIM card is not installed.
The SIM card is damaged. Please contact your
network service provider.
Fail to dial
out
Please check if you press the dial key after
typing the number.
Please check if calling is forbidden because of
default settings.
Please check if the SIM is valid.
Please check if the call barring is set.
Please check if the fixed dial function is set.
Callers can
not contact
you
Please check if the mobile phone is on and
connected with the network.
Please check if the Call barring or call divert is
activated.
Please check if the SIM card is valid.
Fail to
charge
May be due to poor contact. Please check if the
plug is connected well.
Please confirm if the environment temperature
is within the range of 0ºC ~40ºC while charging.
The battery or charger is damaged in which
case you need to replace it.
This device complies with part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and (2)
this device must accept any interference received, including
interference that may cause undesired operation.
Changes or modifications not expressly approved by the party
responsible for compliance could void the user's authority to
operate the equipment.
Note: This equipment has been tested and found to comply
with the limits for a Class B digital device, pursuant to part 15
of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a
residential installation. This equipment generates, uses and
can radiate radio frequency energy and, if not installed and