[REQUEST] Lenovo X270 (R0IETxxW) Whitelist Removal

[thinkpadx270]

Hello,

I want to disable the WWAN whitelist on my X270.

I have dumped the original BIOS firmware, applied this patch: https://github.com/digmorepaka/thinkpad-...hes_v7.txt

Code:

# LenovoWmaPolicyDxe | Lenovo Thinkpad T470/T480, maybe others | remove wwan whitelist
79E0EDD7-9D1D-4F41-AE1A-F896169E5216 10 P:0BC8394B040F8437020000:0BC8394B04E93802000000
79E0EDD7-9D1D-4F41-AE1A-F896169E5216 10 P:C8390B7516:C8390B7500
79E0EDD7-9D1D-4F41-AE1A-F896169E5216 10 P:ECA8047404:ECA804EB04

# LenovoWmaPolicyDxe | Lenovo ThinkPad X270| USB wwan whitelist | digmorepka
79E0EDD7-9D1D-4F41-AE1A-F896169E5216 10 P:8BF0418D7F01418BDF85D20F84D10000:8BF0418D7F01418BDF85D2E9D2000000

(full copy in attachments)

replaced

Code:

4C 4E 56 42 42 53 45 43 FB

with

Code:

4C 4E 56 42 42 53 45 43 FF

flashed the patched firmware, got the Advanced Menu with overclocking and all other stuff, but the WWAN whitelist is still in force - the laptop does not boot and shows error "1802: unauthorized network card" with a 3rd party card. If I put the original WWAN card the laptop boots normally.

If you know how to correctly disable the WWAN whitelist on X270 then please share.

Also there is another small issue - the laptop complains about incorrect time/date and wants me to adjust it but I could not find where to change the time/date in the patched BIOS. It is not on the 2nd tab as it was in the original BIOS (as far as I remember) and I wasn't able to find it anywhere else, could you advise how do I change the time/date?

The full model name is: 20HN0012UK SDK0J40697

[thinkpadx270]

Also there is another small issue - the laptop complains about incorrect time/date and wants me to adjust it but I could not find where to change the time/date in the patched BIOS. It is not on the 2nd tab as it was in the original BIOS (as far as I remember) and I wasn't able to find it anywhere else, could you advise how do I change the time/date?

this issue is resolved, see FAQ here: https://github.com/n4ru/1vyrain

Missing Date & Time in BIOS
This is a side effect of the Advanced Menu needing to go somewhere. You’re not blind. The Date & Time tab is gone. If you really need it, flash a fresh BIOS. You probably don’t though. Setting this in the OS propagates it to the BIOS, in both Windows and (all?) flavors of Linux.

But I am still interested in removing the WWAN whitelist as I haven't found a solution yet.

[thinkpadx270]

I've tried to replace the original modem's vendor ID and product ID with a new modem's IDs in a hex editor, but it did not help, as well as patching the updated dump with the abovementioned patches.

I've replaced about 10 occurrences of original modem's IDs with the new IDs, but laptop still reports error 1802. Then I've put back the original modem and booted the laptop with patched BIOS, and it booted normally, despite having no mentions of the original modem's vendor ID and product ID.

This means that the real whitelisted IDs are somehow hidden or encrypted.