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But is 4G LTE possible in the T420 with Modified Bios?

T400/T410/T420 and T500/T510/T520 Series
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A1Giorgio
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Location: Genoa, Italy

But is 4G LTE possible in the T420 with Modified Bios?

#1 Post by A1Giorgio » Tue Sep 20, 2022 9:34 am

Greetings,
I have a T420, I modified the Bios, with this "T420_bios_1.52_NWL_ADV_0xE2_AES-NI_RAM_VBIOS_SIGN" thus removing the white list. In fact I have installed an unsupported wifi card and it works great !.

Now the only thing that makes me prope towards the T440p is the fact that I can't get any 4G LTE card to work !, I don't want to use the phone or external cards. I've tried 3 but none of them work. Beeps and the system does not boot.

Yet there is no white list in the bios installed! Why?

I also leave you the link of the post where I found the BIOS.
https://www.bios-mods.com/forum/Thread- ... l?page=36

It's a mystery, I haven't found anyone that runs 4G LTE in the T420

I'm sorry for my english

flapjackfiasco
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Joined: Mon Jan 23, 2023 4:23 pm
Location: St. Augustine, FL

Re: But is 4G LTE possible in the T420 with Modified Bios?

#2 Post by flapjackfiasco » Mon Jan 23, 2023 4:28 pm

I was just asking someone about this recently. What I gathered from that conversation is that the 4G card you use has to be using the USB signal lines on PCIe slot. I haven't had the opportunity to start digging into which cards fit into this category. Hope that helps some!

RealBlackStuff
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Re: But is 4G LTE possible in the T420 with Modified Bios?

#3 Post by RealBlackStuff » Tue Jan 24, 2023 4:10 am

No idea about all this, but maybe you need an adapter such as this: https://www.ebay.com/itm/204139494103
There are many adapters, so check carefully!
Lovely day for a Guinness! (The Real Black Stuff)
Lenovo: X240, X250, T440p, M900 Tiny (all with W7/SP1 and NO updates since 2018).

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