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Paper Tape
Posts: 3
Registered: ‎05-14-2011
Location: Sweden
Message 1 of 15 (47,061 Views)

T420 3G Mobile Broadband

[ Edited ]


I'm trying to use my built in 3G modem in my T420.

I'm running the "Launch Lenovo Broadband COnnect" from "Lenovo ThinkVantage Toolbox".

I'm located in Sweden but in the dropdown box for "Provider" there are none listed.

I'm trying "Other" but it fails with a message that I need a proper SIM card.

My provider is Telia and my SIM is inserted.

What gives? Please advice.


Best regards,


Posts: 906
Registered: ‎11-26-2008
Location: NO
Message 2 of 15 (47,037 Views)

Re: T420 3G Mobile Broadband

Are you sure that your model got 3G? Some models are WWAN upgradable which means you have to buy and insert the 3G adapter. What is the model/type of your T420 (XXXX-YYY)?


Do you see the 3G adapter in device manager and no missing drivers?



What's DOS?
Posts: 1
Registered: ‎07-01-2011
Location: Poland
Message 3 of 15 (46,696 Views)

Re: T420 3G Mobile Broadband



I have T420, part number 4180RN4. On back side, close to battery there is a simcard port (just like on this image

I do not have any 3g device in 'device manager'. Im using Windows 7 Professional 64bit.


How can i check if my T420 do have 3g device? Is it possible that even I've got SimCard slot there isnt any device which support it ?

Paper Tape
Posts: 2
Registered: ‎07-02-2011
Location: Singapore
Message 4 of 15 (46,679 Views)

Re: T420 3G Mobile Broadband

My unit 417858Y also come with SIM slot but unusable...


You need hardware below in order to have 3G network

  • Intel Centrino Advanced-N + WiMAX 6250
  • Integrated Mobile Broadband (Sierra Wireless MC8355 - Gobi 3000)

Normal T420 come with device below cant access 3G network

  • Intel Centrino Advanced-N 6205 (2X2 AGN)
My TPs: T420 41785YA: i7-2620M, 1600x900 HD+, 8GB DDR3 RAM, 500GB HDD, 1600x900 HD+, NVS 4200M 1GB, Intel N6205 WiFi, BT 3.0, Win 7 Pro x64
What's DOS?
Posts: 1
Registered: ‎09-07-2011
Location: Sweden
Message 5 of 15 (45,724 Views)

Re: T420 3G Mobile Broadband

Initially I thought it didn't work, but after some research in the device list in windows I found Ericsson f5521gw. This is a quite capable mobilde device with 3G and GPS. It works fine with my Telia SIM.

Windows Control Panel > Network and Internet
Under "Lenovo Internetaccess"
Choose "Find Wireless network"
(Don't use "Active mobile broadband")
Change "Places" to "Mobile broadband" and click "Connect".
If your SIM is inserted and everything is working, it will ask for your PIN.
My connection failed the first time, due to some first time connect updates, but worked perfect the second time!

/ Lasse
Posts: 305
Registered: ‎12-01-2009
Location: Czech Republic
Message 6 of 15 (45,713 Views)

Re: T420 3G Mobile Broadband

I have T400s with 3G and it workes correctly. But take care, SIM slot hase each this device, but it doesnt mean it has really 3G modem inside. Its optional.
Lenovo T440s, 20AQ0067MC, Windows 8.1 Pro x64 UEFI, Samsung 840 EVO SSD 250 GB, 8 GB RAM
Lenovo T430s, 2356LQG, Windows 8.1 Pro x64 UEFI, Intel 520 SSD 180 GB, 8 GB RAM
Lenovo T420s, 4171-6SG, Windows 8 Pro x64 UEFI, Intel 320 SSD 120 GB, 8 GB RAM
Lenovo T400s, 2808-CYG, Windows 7 Ultimate x64
What's DOS?
Posts: 1
Registered: ‎07-23-2012
Location: Cape Town, South Africa
Message 7 of 15 (37,642 Views)

Re: T420 3G Mobile Broadband

Hi there,


I've got a T420, TYPE: 4178-C7G....


I've inserted the sim card into the slot behind the battery, buy not getting anything?  I really thought this laptop had built-in 3G, how do I find out if I need to buy the additional hardware to get it set up?


Thank you!


Token Ring
Posts: 130
Registered: ‎07-03-2012
Location: Bucharest, Romania
Message 8 of 15 (37,634 Views)

Re: T420 3G Mobile Broadband

You need one of these WWAN cards for T420:


0A36185 - Gobi™ 3000 Sierra Wireless EV-DO/HSPA WWAN Minicard -

0A36186 - Ericsson HSPA+ WWAN Minicard (F5521gw) -


Check your Device manager > network adapters.

Anyway, I have looked on page:


ThinkPad T420 (4178-C7G)

i5-2540M(2.60GHz),4GB RAM,500GB 7200rpm HD,14in 1600x900 LCD,1GB NVIDIA N12P-NS1,CDRW/DVDRW,Intel 802.11agn wireless,Bluetooth,1Gb Ethernet,UltraNav,Secure Chip,Fingerprint reader,Camera,6c Li-Ion,Win7 Pro 64


I wonder if your unit has WWAN antenna or not, there is no "WWAN option" or "WWAN ready" mentioned in the list.

T420s i5-2520M HD3000 480GB Crucial M500 SSD 8GB RAM Ericsson F5521gw
T430 i5-3210M HD4000/NVIDIA 5400M 512GB Crucial MX100 SSD 12GB RAM Ericsson H5321gw
Token Ring
Posts: 132
Registered: ‎04-24-2012
Location: Birmingham, UK
Message 9 of 15 (37,620 Views)

Re: T420 3G Mobile Broadband


You need a WWAN card as your system specs say there is an 'option'.
ThinkPad T420s (4174-HG6) i5-2540M 8GB RAM, 320GB HDD
ThinkPad T430s (2356-GDG) i5-3320M, 8GB RAM, 500GB HDD x 2
Posts: 38
Registered: ‎04-18-2012
Location: US
Message 10 of 15 (33,392 Views)

Re: T420 3G Mobile Broadband

I installed mSATA SSD on miniPCI slot where should be place Modem. Now where have to install Sierra Wireless MC8355 - Gobi 3000 or Ericsson 3G modem. my miniPCI slot is acupied with mSATA SSD... 

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