yashsingh1/xdaforums huggingface dataset:
[Xiaomi Mi 5 Guides, News, & Discussion] karlosSLO:
I hope that band 20 will be unlocked :D
[Xiaomi Mi 5 Guides, News, & Discussion] jonas2790:
Maybe this can help: https://twitter.com/laginimaineb/status/737051964857561093
[Xiaomi Mi 5 Guides, News, & Discussion] NisseGurra:
More:

http://www.slashgear.com/android-so...cted-qualcomm-trustzone-in-question-31442245/
[Xiaomi Mi 5 Guides, News, & Discussion] SanguineDrone:
Tell me what to do I will try it (^‿^v)
[Xiaomi Mi 5 Guides, News, & Discussion] samteeee:
That'll be really good! I'm on the fence s to buy this or OP3 just because of the Bands or rather lack of it!

Thank you.
[Xiaomi Mi 5 Guides, News, & Discussion] tndb:
We might learn some from redmi note 3 with snapdragon http://xdaforums.com/redmi-note-3/help/android-6-band-20-redmi-note-3-pro-t3403378
[Xiaomi Mi 5 Guides, News, & Discussion] Pistachio20:
i suggest to anyone who actually has the phone to try an unofficial rom as it might fix the problem with unlocking the bands
[Xiaomi Mi 5 Guides, News, & Discussion] bisato:
The guys from Redmi Note 3 made it possible:

http://xdaforums.com/redmi-note-3/development/finally-4g-band-20-800-mhz-t3410437
[Xiaomi Mi 5 Guides, News, & Discussion] megthebest:
Yes, i heve seen it about Redmi Note 3, so it could be feasible also for our Mi5, or am i wrong?

Sent by Mi5 64Gb
[Xiaomi Mi 5 Guides, News, & Discussion] tndb:
I was right the whole time. Ive always suspected non-hlos.bin file and thats the key if we look at redmi note 3. While we most certainly cant flash the file from redmi note 3 due to different drivers/hardware, we might unlock it by comparing the different non-hlos.bin files. Maybe a bounty is in order?
[Xiaomi Mi 5 Guides, News, & Discussion] art000:
Sorry for the late reply! Seem to me the method I suggested is work! Please check the phone I upload with this reply. Tell me do my Mi 5 is unlocked!

Screenshot:

https://drive.google.com/file/d/0B9UdHN5CoYxOQXVtaE1CQzlweDA/view?usp=drivesdk

https://drive.google.com/file/d/0B9UdHN5CoYxOVEUxdnNNV0ZuY2c/view?usp=drivesdk
[Xiaomi Mi 5 Guides, News, & Discussion] oile:
Extract the file from G5 and op3 roms and try it! :)
[Xiaomi Mi 5 Guides, News, & Discussion] bisato:
This does not tell if you are "unlocked"

try this app:

https://play.google.com/store/apps/details?id=net.simplyadvanced.ltediscovery
[Xiaomi Mi 5 Guides, News, & Discussion] n4m3less:
Hi! someone tested this procedure (for redmi note 3 snapdragon)

http://xdaforums.com/redmi-note-3/development/finally-4g-band-20-800-mhz-t3410437

on mi5?

thanks
[Xiaomi Mi 5 Guides, News, & Discussion] NisseGurra:
There are no Mi5 pro etc with band 20 active to extract the modem from. Taking this file for other device is a almost 100% way to brick your device...
[Xiaomi Mi 5 Guides, News, & Discussion] 1br2:
Sorry for the long time before reply.

For the NVRAM values, we need :

ID Desc
01877	rf_bc_config
00441	band_pref
00946	band_pref_16_31
02954	band_pref_32_63
06828	lte_bc_config

Thanks
[Xiaomi Mi 5 Guides, News, & Discussion] terragady:
Hi, so actually you are from Norway, may I ask before ordering my Xiaomi if the lacking band 20 is a problem here? I live in Oslo but very often go countryside. Will I have no network there? There is already quite bad coverage, but with xiaomi I am afraid that it might be worse?
[Xiaomi Mi 5 Guides, News, & Discussion] mtimmy:
i have extracted the modem from lg g5 and opo 3 flashed in ., and it didnt work. flashing the original modem back in there make the phone back to life.
[Xiaomi Mi 5 Guides, News, & Discussion] 1br2:
You need to change NVRAM values, not flash the modem, each modem files is for one model of device and is incompatible with an other.

If you copy the values, it's maybe working ;)

I don't have other smartphone on snapdragon 820 so I can't certify :/
[Xiaomi Mi 5 Guides, News, & Discussion] Carach_CZ:
Nothing new then? I really want this phone, but without ability to use LTE it would be useless.
[Xiaomi Mi 5 Guides, News, & Discussion] mtimmy:
Thanks ., i know what i am doing, ... I unlock phones and repair them for a living..... sadly... the lock is within the kernel
[Xiaomi Mi 5 Guides, News, & Discussion] j2002:
If that's true, then there's a hope if Xiaomi releases the sources. Let's see.
[Xiaomi Mi 5 Guides, News, & Discussion] bisato:
That must be one reason, but there must be also another one, why it isn't working. Because I edited the NVRam values and I am running CM13. And it is also not working.

Or is this resctriction also in CM13 kernel?
[Xiaomi Mi 5 Guides, News, & Discussion] tndb:
Not sure if this is of any use but found something interesting when scrolling through the values in QXDM. There are several B20 values in there (for calibration and all sort) and if you try to read them, it will only say "NV Status Error Recieved: No such file or directory" but you can write value and then re-read it and it will stay put. I looked through them all and wrote them but still no go but maybe it will help us unless the solution still is in NON-HLOS.bin.

The B20 ID starts on 65983 followed by a bunch @ 66106 and further down the list theres more B20 ID´s
[Xiaomi Mi 5 Guides, News, & Discussion] chada77:
Someone in this thread managed to get B20 up but cant test due to no network coverage. Anyone here can try the values they used? In post 15 - http://en.miui.com/forum.php?mod=redirect&goto=findpost&ptid=311247&pid=5679302
[Xiaomi Mi 5 Guides, News, & Discussion] tndb:
Just tried changing these values

00441 2nd 0xFFFF (original - 0x0)

00946 2nd 0xBFFF (original - 0x0000)

01877 1st 562950035734915 (original - 562950035734915)

02954 2nd 805765120 (original - 0)

06828 1st 2061719111903 (original - 2061584302149)

No dice

and after that I wiped and reflashed dev rom from xiaomi.eu as it says in description but still no go.

I have two simcards which ive tried, one of them uses band 20 and the other band 8 and its also the only LTE net available out here where I am atm but unless i´ve missed something its not working.. My phone is the small Mi5 32GB model incase theres any difference on the 64/128GB internal components
[Xiaomi Mi 5 Guides, News, & Discussion] SanguineDrone:
[/COLOR]According to this

https://www.telegeography.com/produ...s-offering-4g-services-using-2-6ghz-spectrum/

It looks like Taiwan t star introduced 2600mhz band 7, which the mi5 supports natively.

So I am a little suspect of that post. Am I wrong?
[Xiaomi Mi 5 Guides, News, & Discussion] tndb:
Band 5 is supposedly working though if you look at this picture http://en.miui.com/forum.php?mod=viewthread&tid=311247&page=2#pid5678991 but the first screenshot in the thread that shows all different LTE bands doesnt tell if it works or not as I can see all those aswell available despite not getting signal from it
[Xiaomi Mi 5 Guides, News, & Discussion] SanguineDrone:
Okay I will try as soon as I can.

Just to clarify, in post 15 it says

Do we need to reinstall the rom after changing values ???
[Xiaomi Mi 5 Guides, News, & Discussion] tndb:
Not sure if needed but I reinstalled rom aswell as I mentioned earlier just to be certain
[Xiaomi Mi 5 Guides, News, & Discussion] pellemando:
hmm, here is an updated version: http://en.miui.com/thread-311977-1-1.html

Does anyone have the possiblity to try this out?

I havent got my Mi5 yet, so i cant
[Xiaomi Mi 5 Guides, News, & Discussion] mtimmy:
There is no changes to our earlier testing by changing the LTE BC file , the only difference here are some people.in Taiwan able to get band 8 because they are on the new China developer rom.

I can confirm this does not work on any other band except the maybe working band 8

I am in USA with 1 2 4 5 7 12 band to test. And non of them work
[Xiaomi Mi 5 Guides, News, & Discussion] abyssq:
Band 1 and 7 work by default and Band 5 also confirmed.
[Xiaomi Mi 5 Guides, News, & Discussion] kylemd:
There is actually...from here.

I did it this morning and it gave me an "Item Inactive" warning. I'm not yet sure if it makes any difference but I will be reporting back if it does.
[Xiaomi Mi 5 Guides, News, & Discussion] mtimmy:
those other changes are not LTE related,. they are just changes to CDMA

---------- Post added at 11:49 PM ---------- Previous post was at 11:47 PM ----------

Adding GSM / WCDMA bands:

NV 01877 - RF Band Configuration

NV 00441 - Band Class Preference

NV 00946 - Expand Band Preference 16 to 32 Bits

NV 02954 - Bits 32 to 63 of Band Preference

- Adding LTE bands:

NV 06828 - LTE BC Configuration

NV 06829 - LTE BC Configuration DIV
[Xiaomi Mi 5 Guides, News, & Discussion] tndb:
Ill be damned... Band 8 actually Works!

Band 20 needs more stuff to make work but should be possible with some work.

Band 5 and 8 is confirmed working now by changing some values with qpst and qxdm along with latest China dev rom or latest xiaomi.eu rom (which is based on the China dev rom anyways)

IM SO EXCITED! :)
[Xiaomi Mi 5 Guides, News, & Discussion] abyssq:
Good news, thanks for sharing it.

I hope we are very close to B20 now. :)
[Xiaomi Mi 5 Guides, News, & Discussion] wissou050987:
Any word lte band for USA? Like band 2?
[Xiaomi Mi 5 Guides, News, & Discussion] SanguineDrone:
I tried it, and although it says the bands are unlocked in the app, I'm not getting any LTE on T-mobile (B2, B4, B12).

Anything else I should try?
[Xiaomi Mi 5 Guides, News, & Discussion] wissou050987:
thanks man...
[Xiaomi Mi 5 Guides, News, & Discussion] yoocharn:
I am on cricket wireless, which uses AT&T network, in US. Successfully changed the nvram setting, but no LTE connection. Anyone having success?
[Xiaomi Mi 5 Guides, News, & Discussion] yoocharn:
I finally got LTE on AT&T network though the speed was very low and B05 was used somehow. Hopeful!
[Xiaomi Mi 5 Guides, News, & Discussion] Hogenhogen:
Someone tryed these items for unlocking umts/lte bands of mediatek?

Is it useless?

tp://mediatek.software.informer.com/pages/4/
[Xiaomi Mi 5 Guides, News, & Discussion] webcool123:
Yes, it is useless.The MI5 has a Qualcomm chip.
[Xiaomi Mi 5 Guides, News, & Discussion] jonny_blagwind:
Finally got 4gs

On holiday in Spain and have the 4gs lol first time I've ever seen it on this phone thought band 20 is advertised as unlocked out've the box?
[Xiaomi Mi 5 Guides, News, & Discussion] Hogenhogen:
Thxs , I mistook a thread:crying:
[Xiaomi Mi 5 Guides, News, & Discussion] thedrickster:
I think AT&T's main LTE band is 17, perhaps the Mi5 doesn't actually have hardware support for 17?

Can't recall, was a definitive list of hardware supported bands ever discovered?
[Xiaomi Mi 5 Guides, News, & Discussion] trad3mark:
Someone earlier posted a link to this thread:

http://xdaforums.com/mi-5/how-to/progress-trying-to-unlock-bands-t3337476/page28

Was that ever tested or verified? I've an mi5 pro, just got the unlock code today, but I won't be able to do anything with it till Monday. My plan was to go with cm13. I'm in Canada on Fido that uses bands 4, 7 and 17. Is there anything I can do to help or unlock those bands?
[Xiaomi Mi 5 Guides, News, & Discussion] flavien317:
Hi, do you have unlock Band20 of your Mi5 ?
[Xiaomi Mi 5 Guides, News, & Discussion] pack21:
I have 4g most the time, what is missing on MI5 is the 4g 800mhz.
[Xiaomi Mi 5 Guides, News, & Discussion] tlxxxsracer:
has anyone in the US gotten 2 4 and 12 unlocked? im on tmobile

just rooted my mi5 and really anxious and wanting to give this a shot
[Xiaomi Mi 5 Guides, News, & Discussion] ha tsu yu me:
I successfully wrote both 2061584892127 and 2061752272095 to lte_bc_config in my device NVRAM but in neither case was I able to connect to LTE networks in the USA. In the app LTE Discovery (not sure how to use Network Signal Guru) it just says "N/A" under LTE connection.

Has anyone else in the US had any luck using this method? I am using a brand new Mi5 Pro.
[Xiaomi Mi 5 Guides, News, & Discussion] tlxxxsracer:
do we need to do steps 14-17 in the "[TUTORIAL] How to unlock more LTE frequency bands on Mi Note Pro" guide??

or just change the value in step 13.. write and reboot?

---------- Post added at 02:05 PM ---------- Previous post was at 01:55 PM ----------

just confimed.. I unlocked band 2, 4 and 12 for Tmobile.. Still no LTE for me.

Used the value 2061718587615

11110000000001000000000010000100011011111
[Xiaomi Mi 5 Guides, News, & Discussion] AdLion:
FYI iBuyGou is selling Global version of this phone (it supports B20). Unfortunately is a "Wholesale only" thing :crying:

ibuygou.com/wholesale/
[Xiaomi Mi 5 Guides, News, & Discussion] terragady:
maybe they can send a sample :D
[Xiaomi Mi 5 Guides, News, & Discussion] carstenheuer:
Then there must be a way to get B20 to work...:cool:
[Xiaomi Mi 5 Guides, News, & Discussion] thedrickster:
I don't have a solution but am also looking to enable LTE on T-Mobile.

Did you flash the developer ROM?
[Xiaomi Mi 5 Guides, News, & Discussion] tlxxxsracer:
yes of course dev is flashed. will have to wait i guess
[Xiaomi Mi 5 Guides, News, & Discussion] thedrickster:
Apparently so. I asked because I noted some success on the MIUI forum w/o flashing developer.

I don't think the fact that bands 5 & 8 are confirmed working but not 2, 4 or 12 (despite NVRAM config) bodes well for us.
[Xiaomi Mi 5 Guides, News, & Discussion] fredda88:
I wonder what this is?

https://www.ibuygou.com/wholesale/
[Xiaomi Mi 5 Guides, News, & Discussion] carstenheuer:
maybe a fake...
[Xiaomi Mi 5 Guides, News, & Discussion] fredda88:
Don't think so, ibuygou is a reliable chinese reseller.
[Xiaomi Mi 5 Guides, News, & Discussion] caruandroid:
Which did you use to display those results. LTE discovery doesn't show much
[Xiaomi Mi 5 Guides, News, & Discussion] lapocompris:
Where did you see anything about B20 support ?
[Xiaomi Mi 5 Guides, News, & Discussion] fredda88:
Not that hard to see actually :)
[Xiaomi Mi 5 Guides, News, & Discussion] TheUltrametricSpace:
Nah they are scam. Just like all re-sellers are scam.

Ask if you need more details and an explanation why such.
[Xiaomi Mi 5 Guides, News, & Discussion] fredda88:
Well if you want to call their business model a scam it's up to you but for me it's a reliable source for Xiaomi products.

On their forum they answered that it's a software modification and i have since that asked if it's Xiaomi's official modification or not. Anyway, if it's true we will hopefully be able to implement the modification on our phones to.
[Xiaomi Mi 5 Guides, News, & Discussion] TheUltrametricSpace:
Yeah, Chinese reseller do scam; each and every of em do it.

I have bought enough and had enough trouble, and yet won't stop buying Xiaomi devices and other Chinese phones by em.

But this doesn't stop re-seller from scamming and spreading misleading information or lies.

It would be cool to have it; I hope it's true. But hardly doubt that it's more than misleading information spread by a business model built on scamming people.
[Xiaomi Mi 5 Guides, News, & Discussion] olvrick:
is it possible somehow to unlock CDMA rev.B on mi5? Rev.a works, but cant get rev.b to work=(
[Xiaomi Mi 5 Guides, News, & Discussion] mateosimon2014:
Somebody can unlock band 4 or 28?

Enviado desde mi A0001 mediante Tapatalk
[Xiaomi Mi 5 Guides, News, & Discussion] lapocompris:
http://xdaforums.com/mi-5/how-to/mi5-mi-max-unlocked-bands-successfully-t3420808
[Xiaomi Mi 5 Guides, News, & Discussion] jonny_blagwind:
Bizarrely today in west London I had a brief glimpse of 4g!
[Xiaomi Mi 5 Guides, News, & Discussion] juanchopl87:
something news of Unlock band 20?
[Xiaomi Mi 5 Guides, News, & Discussion] lapocompris:
Did you read the fine print started with : Please note... ?
[Xiaomi Mi 5 Guides, News, & Discussion] fredda88:
They have added that now :mad:
[Xiaomi Mi 5 Guides, News, & Discussion] whitecube:
i hope there will be a radio/modem image that unlock the band 20.
[Xiaomi Mi 5 Guides, News, & Discussion] greasymonkey1960:
Digging around for LTE Band 20

Using QPST and QXDM, the "Preferred Bands" set that is available in the Mi5 does not include the Band 20 (EU Digital Dividend) band, which uses 791 - 821 MHz on UE downlink (Rx) and 832-862MHz on UE uplink (Tx).

The Preferred Bands list which is implemented appears to be a typical Qualcomm invention, where "CDMA rules" and they enable a few other UTRA/EUTRA bands for convenience, but not all of them.

If somebody finds a method to add more Preferred Bands to the device, it would be great to hear, but at this stage I am guessing that Mi5 users will remain "disconnected" on LTE800 for the foreseeable future.

Just for interest, here is the Preferred band list currently enabled in the Mi5:

CDMA Band Class 0, A-System US Cellular 800Mhz

CDMA Band Class 0, B-System

CDMA Band Class 1, all blocks US PCS 1800 to 2000Mhz

CDMA Band Class 3, A-System Japan Cellular JTACS band 832 to 925 Mhz

CDMA Band Class 4, all blocks Korean PCS band 1750 to 1870 Mhz

CDMA Band Class 5, all blocks NMT-450Mhz band

GSM DCS 1800 band Europe GSM-1800

GSM Extended GSM (E-GSM) band includes RF band 9 GSM

GSM Primary GSM (P-GSM) band Europe GSM-900

CDMA Band Class 6 IMT-2000 2Ghz band

CDMA Band Class 7 uper 700Mhz band

CDMA Band Class 8 1800Mhz band

CDMA Band Class 9 900Mhz band

CDMA Band Class 10 Secondary 800 MHz band

CDMA Band Class 11 400Mhz European PAMR band

GSM 450 rural parts ( not in use )

GSM 480 ( not in use )

GSM 750 ( not in use )

GSM 850 band US GSM-850

RGSM 900 includes RF bands 8,9 GSM Railways

GSM PCS 1900 band US GSM-1900

WCDMA Band I -3G 2100 EUROPE Japan & Asia New-Zeland

WCDMA Band II - PCS 1900 North America

WCDMA Band III - 1800 DCS 3G 1800 EUROPE Asia

WCDMA Band IV - US 1700 (AWS) band US TMobile, Canada Wind 3G AWS

WCDMA Band V - 3G 850 North America, Australia, New Zealand, Philippines

WCDMA Band VI - 800 band 3G Japan

CDMA Band Class 12 800Mhz PAMR band

CDMA Band Class 14 US PCS 1.9 GHz

WCDMA Band VII - 2600 3G EUROPE

WCDMA Band VIII -3G 900 Europe, Asia, Australia, New Zealand

WDCMA Band IX -1700 Japan EMobile, FOMA 3G

CDMA Band Class 16 US 2.5Ghz
[Xiaomi Mi 5 Guides, News, & Discussion] thedrickster:
Interesting.

I've enabled WCDMA Band IV (AWS) and LTE Band 4, yet unable to connect to T-Mobile LTE service in my area which is now on band 4. I'm connecting to HSPA+ on PCS (1900mhz) without issue, but there is absolutely no sign of LTE (my network or others).

In theory LTE band 4 should work as WDCMA Band 4 (AWS 1700 up/ 2100 down) is enabled, as is the LTE band and per an earlier post the the Skyworks PAM supports Band 4. Though based on the above, might be SOL on LTE band 12, as I don't see 700mhz Lower band on that list.

I wonder if my inability to connect to Band 4 is just a manifestation of the MIUI SIM1/SIM2 LTE software problem noted in other posts or an issue with the QCN as my phone came with the Global ROM installed.
[Xiaomi Mi 5 Guides, News, & Discussion] Zhaman:
After performing these actions, I got enable B1, 2, 3, 4, 5, 7, 8, 12, 17, 20, 28, 38, 39, 40, 41 in Network Signal Guru application. Could this be a reality? Sorry for my English.
[Xiaomi Mi 5 Guides, News, & Discussion] laueugen:
Hi,could you send me the links with everything you've done to enable all these bands?I know that B20(800)will not work but at least will have the others enabled.A and how see the enabled bands in Network Signal Guru app?because mine not showing anything of these.

Trimis de pe al meu MI 5 folosind Tapatalk
[Xiaomi Mi 5 Guides, News, & Discussion] fredda88:
Enabled bands is under the "wand", band locking / LTE
[Xiaomi Mi 5 Guides, News, & Discussion] Zhaman:
the link -

http://xdaforums.com/showpost.php?p=64675180&postcount=11

I have rooted phone and localized by miui.su firmware, may be this was the reason of showing the bands in Network Signal Guru. How can I stick my screenshots of Network Signal Guru?
[Xiaomi Mi 5 Guides, News, & Discussion] fredda88:
Just attach your screenshot by pressing the "paperclip" in the menu.
[Xiaomi Mi 5 Guides, News, & Discussion] laueugen:
Thx guys i will Root my phone and try again

Trimis de pe al meu MI 5 folosind Tapatalk
[Xiaomi Mi 5 Guides, News, & Discussion] greasymonkey1960:
I am sorry to pop your bubble of hope on this, but having the bands showing enabled in Network Signal Guru does not mean that the bands have been turned on in the modem.

Yes, you can turn off LTE bands by re-calculating the value for NVRAM 6828 value, and entering this new value into the device, however to enable the additional LTE bands, the values are not used until the modem and associated RF devices have the relevant frequency bands enabled through some other mechanism.

The enabling of 2G and 3G bands is fairly straight-forward, but the LTE Modem and RF devices associated with the modem is activated in some other way, something FFS (For Further Study).
[Xiaomi Mi 5 Guides, News, & Discussion] Zhaman:
Thanks a lot for information.
[Xiaomi Mi 5 Guides, News, & Discussion] n4m3less:
Now that they have released the kernel source there are more chances to unlock the band 20?
[Xiaomi Mi 5 Guides, News, & Discussion] vzeu3:
Nice, I've been waiting for this since they launched it.
[Xiaomi Mi 5 Guides, News, & Discussion] megthebest:
Yes, probably the developers have more chances to do it... We will pray for a big success on bands unlocking and custom rom for the near future! [emoji106]

Sent by Mi5 64Gb
[Xiaomi Mi 5 Guides, News, & Discussion] Top4man:
Band 4 is not possible to unlock for Mi5 pro 128 gb?
[Xiaomi Mi 5 Guides, News, & Discussion] Skull_Devil:
Hi Guys I'm from Italy and I also need the b20 but apart from that I'm facing another problem.. I can't get carrier aggregation (1800 & 2600). Do you know the reason of this issue? Maybe you found it studying all the bands.

Thanks a lot
[Xiaomi Mi 5 Guides, News, & Discussion] greasymonkey1960:
It would appear that the Power Amplifier does not support CA on bands 3 & 7.

From Skyworks 77646 Product Description:

4G FEATURES:

Optimized for Envelope Tracking system

LTE supports output power bandwidth bands

1, 25, 3, 4, 39, 26 ,8, 20 , 12, 17 (and sub-bands 9, 10, 18, 19)

B4/12 and B3/8 carrier aggregation

Flexible LB input configuration: any LB input for any band
[Xiaomi Mi 5 Guides, News, & Discussion] Skull_Devil:
So is there no chance to have that kind of Carrier aggregation (b3 and b7)?
[Xiaomi Mi 5 Guides, News, & Discussion] greasymonkey1960:
It would appear that way, based on the hardware listings that have been identified at this time.

I feel your pain on this. I work in LTE Network Performance and Optimisation in different places around the world, and fervently wish that the UE vendors would make all things possible from the hardware perspective, but alas, commercial greed gets in their way (or rather, is their ONLY way)......
[Xiaomi Mi 5 Guides, News, & Discussion] palexr:
Hi, just wondering if there was nay progress here? I thought the kernel availability (or non-availability) was the main thing holding back the wizards from making B20 functional?
[Xiaomi Mi 5 Guides, News, & Discussion] pakidermo5000:
Any chance to use the

Redmi Note 3 Pro and Redmi Note 3 Pro International to check what is different besides nvram values in order to have band 20 unlocked in the latter?

I guess it has to be the modem. I have a Redmi 2, and there are like 4 types of Redmi 2 (2014811, 2014813, 2014817, etc.) They are all pretty much the same phone but support different bands.

You can install ROMs of the 11 into the 13 but will get no signal at all. Then, by only flashing the modem of the 13 you get the signal working. The 2014813 is LTE.
[Xiaomi Mi 5 Guides, News, & Discussion] witek_77:
Poland have first international model of mi5 (but for now only 32gb), redmi note 3 pro and redmi 3s with unlocked band 20 ! We need to check on this phones nvram but in official distribution its very expensive. We are first country with official distribution xiaomi. EU charger and PL letters on box. If I now something more i will write here. Sorry for my eng.
[Xiaomi Mi 5 Guides, News, & Discussion] greasymonkey1960:
I would be very interested in getting hold of one the Mi5's if indeed they have the B20 functional. From that should be able to get things worked out as to what is needed to be changed on the current bunch of Mi5's to turn on B20, and possibly other bands.