20
Problem
Description
Possible
Causes
Problem
Solving
When the
Device is being
installed, the
computer cannot
find it.
1. The installation
programs of the
MODEM device have
not been installed
properly.
1. Run the installation
program first then connect
the device. Now install the
drivers as normal in
Windows.
2. The device is not
connected properly.
2. Restart the computer, or
reconnect the device.
3. The SIM/USIM card
is not inserted properly.
3. Reinsert the (U) SIM
card correctly.
Sent Message
failure.
1. The SMS Center
Number is incorrect.
1. Your device is
preconfigured so it is
unlikely that it will need
changing. However if it is
missing or incorrect
contact your operator.
2. The network is busy
or you are in an area
with no signal.
2. Try later or move to an
area with a stronger signal.
Data connection
failed.
1. You are in the place
where there is no
2G/3G/4G network
coverage
1. Move to an area with
good signal.
2. The network is busy. 2. Try later.
3. The APN in the user
configuration file is
incorrect.
3. Check the APN in the
user configuration file in
the "Network settings".
4. The device data is
corrupted.
4. Local network access or
the target server maybe
experiencing problems.
Retry data request.
5. The network type has
been selected manually,
but is incorrect.
5. Reselect the network
type according to the type
of the (U) SIM card.
