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Blue Screen Again
Posts: 30
Registered: ‎10-07-2012
Location: IN
Views: 120
Message 1 of 2

How to use 4G SIM card in L440

I see there is a sim card slot under battery bay in my ThinkPad L440. Do I need to install a WWAN card? What are the compatible models or specification I need to buy? Can I use 4G VoLTE sim?

Community SeniorMod
Community SeniorMod
Posts: 9,476
Registered: ‎01-01-2010
Location: US
Views: 87
Message 2 of 2

Re: How to use 4G SIM card in L440

Yes, you need a WWAN card.  Here is the parts list which shows options:


I don't think all the L440 machines have the WWAN antennas.  If you don't have the antennas, it is a much bigger problem.  You need to remove the battery and the big door on the back to check.  If you have the antennas, you will see two wires going to the WWAN slot between the CPU and the fan blades.  Probably, one wire is red and one blue.


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