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Scott Mueller's Upgrading and Repairing PCs Forum • View topic - why is there sim card slot on my T420
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 Post subject: why is there sim card slot on my T420
 Post Posted: Fri Dec 29, 2017 6:13 pm 
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Joined: Wed Jun 01, 2011 11:59 am
Posts: 529
Is that sim card slot in the T420 is that for cell internet. like 3G or 4G.

I just think this is just really weird.
I just found out about this by watch a you-tube video installing windows 10
If there is a sim card in it do you need to remove it before any upgrades or repair if so why?


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 Post subject: Re: why is there sim card slot on my T420
 Post Posted: Fri Dec 29, 2017 9:20 pm 
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Posts: 6180
The ThinkPad T420/T520 included a spare PCI Express Mini Card (mPCIe)/mSATA socket, which Lenovo used to install several different mPCIe cellular modem cards (like ). When activated they would provide a cellular based internet connection, allowing the system to be online in areas without WiFi hotspots. Today instead of using such a card I recommend tethering to a cellphone as that would provide the fastest possible connection without having to pay for an additional cellular contract. Since the socket also supports mSATA SSDs, I used it to install a in my T520. Scott.


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 Post subject: Re: why is there sim card slot on my T420
 Post Posted: Sat Dec 30, 2017 8:55 am 
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 Post subject: Re: why is there sim card slot on my T420
 Post Posted: Sat Dec 30, 2017 12:57 pm 
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A SIM card won't be installed (or if it is it won't function) unless you have a WWAN (cellular modem) card in the mPCIe/mSATA slot. Scott.


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 Post subject: Re: why is there sim card slot on my T420
 Post Posted: Sat Dec 30, 2017 5:22 pm 
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 Post subject: Re: why is there sim card slot on my T420
 Post Posted: Sun Dec 31, 2017 12:24 am 
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