Warnings And Precautions - Huawei Mobile Phones User Manual

Problem
The signal strength
is not strong enough
or your phone is
often off line.
Your phone displays
"No service found",
"Service unavailable"
or "Network
problem".

13 Warnings and Precautions

This section contains important information pertaining to the
operating instructions of your device. It also contains
information about how to use the device safely. Read this
information carefully before using your device.
Electronic Device
Power off your device if using the device is prohibited. Do not
use the device when using the device causes danger or
interference with electronic devices.
Ensure that...
Move close to a place with strong signal
strength.
You are in an area with very weak

signal or outside your service
provider's network coverage (in a
tunnel or surrounded by buildings). If
so, move to another area and try
again.
Do not utilize the service option

without obtaining authorization from
your service provider.
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