Here is my config to add a US AT&T 3g Modem. You can use this as a guide.
Just swap out the 6 options below listed in my config.
Example: 1199 68a3
Put in your carriers apn
Example: uci set network.wan2.apn=wap.cingular
I hope this helps
#!/bin/sh
# ---------------------------------------------------------
# 3G Connection Script for WiFi Pineapple. "Does the thing"
#
# Version: 2012-02-17
# Supports:
#
# Sierra USB 308 -SuRb0
# ZTE MF591 (T-Mobile) -dkitchen
# Novatel MC760 (Virgin) -dkitchen
# Novatel MC760 (Ting) -dkitchen
#
# Updated: wifipineapple.com
# ---------------------------------------------------------
# -----------------------------------------------------------
# Configure /etc/ppp/options with hard-coded working settings
# -----------------------------------------------------------
echo "
logfile /dev/null
noaccomp
nopcomp
nocrtscts
lock
maxfail 0" > /etc/ppp/options
# --------------------------------------------------------------------------------------------------
# Check for known usb modem vendor and product IDs then switch 'em from storage to serial modem mode
# --------------------------------------------------------------------------------------------------
echo "Searching for attached 3G Modems"
logger "3G: Connection Script here, searching for modems"
MODEM=$(lsusb | awk '{ print $6 }')
echo $MODEM
case "$MODEM" in
*1199:68a3*) echo "Sierra USB 308"
uci delete network.wan2
uci set network.wan2=interface
uci set network.wan2.ifname=ppp0
uci set network.wan2.proto=3g
uci set network.wan2.service=umts
uci set network.wan2.device=/dev/ttyUSB0
uci set network.wan2.apn=wap.cingular
uci set network.wan2.username=
uci set network.wan2.password=
uci set network.wan2.defaultroute=1
uci commit network
usb_modeswitch -v 1199 -p 68a3
sleep 10; rmmod usbserial
sleep 3; insmod usbserial vendor=0x1199 product=0x68a3
sleep 5; /etc/init.d/firewall disable; /etc/init.d/firewall stop
logger "3G: firewall stopped"
iptables -t nat -A POSTROUTING -s 172.16.42.0/24 -o 3g-wan2 -j MASQUERADE
iptables -A FORWARD -s 172.16.42.0/24 -o 3g-wan2 -j ACCEPT
iptables -A FORWARD -d 172.16.42.0/24 -m state --state ESTABLISHED,RELATED -i 3g-wan2 -j ACCEPT
;;
*19d2:1523*) echo "ZTE MF591 (T-Mobile) detected. Attempting mode switch"
uci delete network.wan2
uci set network.wan2=interface
uci set network.wan2.ifname=ppp0
uci set network.wan2.proto=3g
uci set network.wan2.service=umts
uci set network.wan2.device=/dev/ttyUSB0
uci set network.wan2.apn=epc.tmobile.com
uci set network.wan2.username=internet
uci set network.wan2.password=internet
uci set network.wan2.defaultroute=1
uci commit network
usb_modeswitch -v 19d2 -p 1523 -V 19d2 -P 1525 -M
5553424312345678000000000000061b000000020000000000000000000000 -n 1 -s 20
sleep 10; rmmod usbserial
sleep 3; insmod usbserial vendor=0x19d2 product=0x1525
sleep 5; /etc/init.d/firewall disable; /etc/init.d/firewall stop
logger "3G: firewall stopped"
iptables -t nat -A POSTROUTING -s 172.16.42.0/24 -o 3g-wan2 -j MASQUERADE
iptables -A FORWARD -s 172.16.42.0/24 -o 3g-wan2 -j ACCEPT
iptables -A FORWARD -d 172.16.42.0/24 -m state --state ESTABLISHED,RELATED -i 3g-wan2 -j ACCEPT
;;
*1410:5031*) echo "Novatel MC760 (Virgin Mobile) detected. Attempting mode switch"
uci delete network.wan2
uci set network.wan2=interface
uci set network.wan2.ifname=ppp0
uci set network.wan2.proto=3g
uci set network.wan2.service=cdma
uci set network.wan2.device=/dev/ttyUSB0
uci set network.wan2.username=internet
uci set network.wan2.password=internet
uci set network.wan2.defaultroute=1
uci set network.wan2.ppp_redial=persist
uci set network.wan2.peerdns=0
uci set network.wan2.dns=8.8.8.8
uci set network.wan2.keepalive=1
uci set network.wan2.pppd_options=debug
uci set network.wan2.pppd_options=noauth
uci commit network
usb_modeswitch -v 1410 -p 5031 -V 1410 -P 6002 -M
5553424312345678000000000000061b000000020000000000000000000000 -n 1 -s 20
sleep 10; rmmod usbserial
sleep 3; insmod usbserial vendor=-x1410 product=0x6002
sleep 5; /etc/init.d/firewall disable; /etc/init.d/firewall stop
logger "3G: firewall stopped"
iptables -t nat -A POSTROUTING -s 172.16.42.0/24 -o 3g-wan2 -j MASQUERADE
iptables -A FORWARD -s 172.16.42.0/24 -o 3g-wan2 -j ACCEPT
iptables -A FORWARD -d 172.16.42.0/24 -m state --state ESTABLISHED,RELATED -i 3g-wan2 -j ACCEPT
;;
*1410:5030*) echo "Novatel MC760 (Ting) detected. Attempting mode switch"
uci delete network.wan2
uci set network.wan2=interface
uci set network.wan2.ifname=ppp0
uci set network.wan2.proto=3g
uci set network.wan2.service=cdma
uci set network.wan2.device=/dev/ttyUSB0
uci set network.wan2.username=internet
uci set network.wan2.password=internet
uci set network.wan2.defaultroute=1
uci set network.wan2.ppp_redial=persist
uci set network.wan2.peerdns=0
uci set network.wan2.dns=8.8.8.8
uci set network.wan2.keepalive=1
uci set network.wan2.pppd_options=debug
uci set network.wan2.pppd_options=noauth
uci commit network
usb_modeswitch -v 1410 -p 5030 -V 1410 -P 6000 -M
5553424312345678000000000000061b000000020000000000000000000000 -n 1 -s 20
sleep 10; rmmod usbserial
sleep 3; insmod usbserial vendor=0x1410 product=0x6000
sleep 5; /etc/init.d/firewall disable; /etc/init.d/firewall stop
logger "3G: firewall stopped"
iptables -t nat -A POSTROUTING -s 172.16.42.0/24 -o 3g-wan2 -j MASQUERADE
iptables -A FORWARD -s 172.16.42.0/24 -o 3g-wan2 -j ACCEPT
iptables -A FORWARD -d 172.16.42.0/24 -m state --state ESTABLISHED,RELATED -i 3g-wan2 -j ACCEPT
;;
esac