Using your phone as a Bluetooth modem in Linux

Software Package Requirements:

• wvdial
• bluez
• bluetooth

Install packages for Ubutun/Debian systems
sudo apt-get install wvdial bluez bluetooth

Steps to get your Bluetooth modem working

1. Turn phone’s Bluetooth connection and set to discoverable mode
2. Scan for your device:
   sudo hcitool scan
   Result:
   Scanning ...
00:11:22:33:44:55 MyPhone
3. Search device to see if supports Dial-Up Networking (DUN) for use as a modem. Look out for RFCOMM channel
   sdptool search --bdaddr 00:11:22:33:44:55 DUN
   Result:
   Searching for DUN on 00:11:22:33:44:55 ...
Service Name: Dial-Up Networking
Service RecHandle: 0x1000f
Service Class ID List:
"Dialup Networking" (0x1103)
Protocol Descriptor List:
"L2CAP" (0x0100)
"RFCOMM" (0x0003)
Channel: 4
Language Base Attr List:
code_ISO639: 0x454e
encoding: 0x6a
base_offset: 0x100
Profile Descriptor List:
"Dialup Networking" (0x1103)
Version: 0x0100
4. Bind the modem on the RFCOMM Channel to a device
   sudo rfcomm bind /dev/rfcomm0 00:11:22:33:44:55 4
5. Dial and connect (ensure your wvdial configuration is correct, for sample see below)
   sudo wvdial dstbt
   Result:
   --> WvDial: Internet dialer version 1.60
--> Cannot get information for serial port.
--> Initializing modem.
--> Sending: ATZ
ATZ
OK
--> Sending: AT+CGDCONT=,,"dst.internet"
AT+CGDCONT=,,"dst.internet"
OK
--> Modem initialized.
--> Sending: ATDT*99#
--> Waiting for carrier.
ATDT*99#
CONNECT
~[7f]}#@!}!} } }2}#}$@#}!}$}%\}"}&} }*} } g}%~
--> Carrier detected. Waiting for prompt.
~[7f]}#@!}!} } }2}#}$@#}!}$}%\}"}&} }*} } g}%~
--> PPP negotiation detected.
--> Starting pppd at Wed Aug 19 23:45:04 2009
--> Pid of pppd: 17558
--> Using interface ppp0
--> local IP address 10.84.2.128
--> remote IP address 10.6.6.6
--> primary DNS address 202.152.64.27
--> secondary DNS address 202.152.64.28

6. You’re connected! Surf and enjoy the Internet!

Sample wvdial configuration file

• Stored in ~/.wvdialrc
• Change “dst.internet” to your provider’s APN

[Dialer dstbt]

Modem = /dev/rfcomm0 # modem device
Baud = 115200 # 921600 / 460800 / 115200 / 57600

Init = ATZ # far card with no PIN
# Init = ATZ+CPIN=”0000″ # for card with PIN, replace 0000 with your PIN

# If you know your ISP’s APN, specify it instead of YOUR_ISP_APN below.
# There’s also an APN table at https://wiki.ubuntu.com/NetworkManager/Hardware/3G .
# use one of the following 3 options. change to your providers APN
Init2 = AT+CGDCONT=,,”dst.internet”
#Init2 = AT+CGDCONT=1,”IP”,”YOUR_ISP_APN”
#Init2 = AT+CGDCONT=1,”IP”

# Most services/devices dial with *99# . A few seem to require *99***1#
Phone = *99#

# These often suffice, but your ISP might require different details. They’re
# often dummy details used for all users on the ISP, frequently the ISP’s
# name, but some ISP’s do require you to use a real username and password.
# any details possible
Username = internet
Password = internet

PS: bmobile customers change APN to “bmobilewap”