154
Problem
Possible causes
Possible solution
If you are not able to
connect to the network, the
phone will continue to send
out signals as it attempts to
locate a base station. Doing
so consumes battery power
and will consequently
shorten standby time.
Change your location to one
where the network is
accessible, or temporarily
turn off your phone.
Cannot turn
your phone on
Battery power has been
depleted.
Recharge the phone’s
battery.
4G LTE SIM
card error
4G LTE SIM card malfunction
or damage.
Take the 4G LTE SIM card
to your service provider for
testing.
4G LTE SIM card inserted
improperly.
Insert the SIM card properly.
Debris on the 4G LTE card
contacts.
Use a soft, dry cloth to clean
the SIM card contacts.
Unable to
connect to the
network
4G LTE card invalid.
Contact your service
provider.
You are not within the
network’s service area.
Check the service area with
your service provider.
Poor signal.
Move to an open space, or if
you are inside a building,
move closer to a window.
Phone crashes,
reboots, freeze,
or cannot be
powered on
Some third-party software is
not compatible with your
phone.
Reset the phone to factory
status.
