LG G5310 Guide De L'utilisateur page 187

How to Use Data and Fax call
Receiving Data or Fax Calls – Single number
If you have a SIM card that does not support separate voice, data
and fax numbers, the phone does not recognize the type of incoming
call.
To use a data or a fax service, make sure that you want to receive a
data or fax call mode. You first have to set the phone to one of these
options in the call mode (Settings ➝ Call Setting ➝ Next Incoming)
sub menu.
To receive a data or fax call.
1. Press [Menu] in standby mode.
2. Select the call type you want (Voice, Data or Fax) and press
[Select].
3. Connect your computer to the phone.
4. After starting the communicate software, accept a call and receive
a data or fax (if it is not answered automatically).
5. After the data or fax reception, you can end the call by just ending
of the communicate software, pressing [End].
Once you have set your phone for a specific incoming call, it remains
set until you change it.
PC Sync
PC Sync is a program for data exchange PC & Phone by data
cable. Therefore, if you want to use this function, you have to
buy accessory kit. About more detail for using guide refers to
PC Sync Help file on the PC Sync CD.
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Additional Functions