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21 Posts

06-22-2018

United States of America

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Thinkpad X270 WWAN Compatibility

2018-11-16, 17:47 PM

Hello,

 

My x270 (20K6) has a broken motherboard.  I have found one on ebay (20HM).

 

My 20K6 has the Sierra EM7455 Card which works great. 

 

Does anyone know if the 20HM is also compatible (whitelist, etc) with this card?

 

Having a very difficult time answering this question using the lenovo websites.  It looks like they are recommending the Fibocom L831-EAU. 

 

Thanks for any light anyone can shed - appreciated.

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12964 Posts

06-06-2011

Russian Federation

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Re: Thinkpad X270 WWAN Compatibility

2018-11-16, 21:03 PM
Hi

MT 20K6 is a x270' platform based on Intel CPU 6th Generation, while 20HM is based on 7th Generation.

Despite both platforms use the same UEFI, their wireless devices whitelists differ a bit. But em7455 persists in both wl.

Fibocom L831-EAU will work on 20HM only.

Regarding the choosing between em7455 and L831 the 1st one is more feature rich, more preferable for the USA cellular networks as it supports all LTE networks in almost all frequency bands USA operators work in with minor exceptions. Of course, both modems support 3G networks.
EM7455 supports faster speed, 300 mbps vs 150 mbps L831 has.

Note, you'll need to apply some data in new systemboard. Read the laptop User Guide, the section about UUID.



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21 Posts

06-22-2018

United States of America

42 Signins

365 Page Views

  • Posts: 21
  • Registered: ‎06-22-2018
  • Location: United States of America
  • Views: 365
  • Message 3 of 4

Re: Thinkpad X270 WWAN Compatibility

2018-11-16, 23:19 PM

Thank you for the great reply.

 

Regarding the UUID data - I did some research on this, and am curious if this is needed if the replacement motherboad is from a used computer vs an OEM replacement.

 

Am I correct in thinking if this is coming out of another used thinkpad (that had a damaged screen, so owner is selling) that I do not need to perform this step?

 

Thank you in advance

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12964 Posts

06-06-2011

Russian Federation

17918 Signins

178365 Page Views

  • Posts: 12964
  • Registered: ‎06-06-2011
  • Location: Russian Federation
  • Views: 178365
  • Message 4 of 4

Re: Thinkpad X270 WWAN Compatibility

2018-11-17, 7:46 AM
You're right.

If the OS on your laptop is win7 you'll face a difficulties as, officially, Intel 7th Generations doesn't support it.



x220 • Gobi 2000 3g | hdd, msata ssd, wwan, wifi, gps -- unique config
ThinkPad 25 Special Anniversary Edition. #Retro. Signed by D.Hill
T470p | X1 Carbon Gen3 | Miix 2 10" | Yoga Tablet 2-1050F (Android) + BT Keyboard
ThinkPad Stack • 2.4/5 Wireless Router, HDD 1 TB, BT Speaker, Power Bank, Mobile Projector

Do it well, worse becomes itself

Communities:   English    Deutsche    Español    Portugues    Русскоязычное    Česká    Slovenská    Українська   Moto English

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