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
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