Problem
Possible causes
Unable to
The micro-SIM card is invalid.
connect to the
You are not within the network's
network
service area.
Poor signal.
Cannot make
You have activated Fixed Dialing
outgoing calls
Numbers.
PIN code
You have entered an incorrect PIN
blocked
code three consecutive times.
Unable to enter
The phonebook's memory is already
information into
full.
the phonebook
Phone crashes,
Some third-party software is not
reboots, freezes,
compatible with your phone.
or cannot be
powered on
Device slow or
Too many apps running in the
sluggish
background.
92
Possible solution
Contact your service provider.
Check the service area with your
service provider.
Move to an open space, or if you
are inside a building, move closer
to a window.
Go to Fixed Dialing Numbers and
disable it.
Contact your service provider. If
the service provider provides the
SIM card's PUK code, use the PUK
code to unlock the SIM card.
Delete unnecessary data from the
contacts.
Uninstall the software that may
cause the problem.
Upgrade the phone software.
Reset the phone to factory status.
Touch the Overview key to show
your recently-used apps. Swipe it
left or right to close the app. Touch
to close all the running apps.
For your safety
General safety
Don't make or receive handheld
calls while driving. And never text
while driving.
Keep your phone at least half an
inch (15 mm) away from your ear
or body while making calls.
Small parts may cause choking.
Your phone can produce
a loud sound.
Avoid contact with anything
magnetic.
Keep away from pacemakers and
other electronic medical devices.
Power off when asked to in
hospitals and medical facilities.
Power off when told to
in aircrafts and airports.
Power off when near explosive
materials or liquids.
Don't use at gas stations.
Your phone may produce
a bright or flashing light.
Don't dispose of your phone in
a fire.
To prevent possible hearing
damage, do not listen at high
volume levels for long periods
Avoid extreme temperatures.
Avoid contact with liquids. Keep
your phone dry.
Don't take your phone apart.
Only use approved accessories.
Don't rely on your phone as a
primary device for emergency
communications.
93