From FON Wiki Beta

This is how to set up your Huawei K3715 3G USB dongle. Information here has been taken from the FON2-Tweak-3G-Irish3 page. This has been tested on firmware ver. 2.2.5. For step-by-step instructions on how to change these settings, please see this board article.

umtsd

• You can leave the "umtsdevice" unchanged

/etc/config/umtsd:

config 'umtsd' 'umtsd'
       option 'apn' 
#    option 'user' 
#    option 'pass' 
config 'umtsdstate' 'umtsdstate'
config 'umtsdevice' 'option12D11003'
      option 'vendor' 'Huawei'
      option 'device' 'K3715'
#    option 'data' '/dev/ttyUSB0'
#    option 'cmd' '/dev/ttyUSB0'

umts.lua

• "user" and "pass" variables are usually not mandatory to connect, leave these blank
• modified section "some dummy data" like this

/Apps/umts.lua:

-- some dummy data
local data = "/dev/ttyUSB0"
local cmd = "/dev/ttyUSB0"
local type = "Huawei"
local user = ""
local pass = ""
local apn = ""
local pin = ""

/var/state/umtsd

• If you enter "cat /var/state/umtsd" at the command prompt while connected with your Huawei, this could be the status output:

umtsd.umtsd.attached=1
umtsd.umtsd.device=option12D11001
umtsd.umtsdstate.vendor=
umtsd.umtsdstate.model=
umtsd.umtsdstate.provider=24005
umtsd.umtsdstate.signal=12,99
umtsd.umtsdstate.state=ONLINE
umtsd.umtsdstate.tx=0
umtsd.umtsdstate.rx=0
umtsd.umtsdstate.online=0
umtsd.umtsdstate.signal=12,99