Band 28 unlock - Xiaomi Mi 5 Questions & Answers

How do I unlock band 28 for use? I followed the miui forum tut http://en.miui.com/thread-311977-1-1.html using the 2nd alternative method. So my network signal guru app shows the band on LTE band locking. But the carrier does not register any signal/network.
So my questions are: is it possible to unlock band 28? If so, how did you unlock it for use?
Also, could flashing a new rom/firmware etc. undo any of these modifications?

Com'e on guys! Shed some light into this contentious issue

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Help: Enable LTE band 20 on SM-N9208.

Hi, i have SM-N9208 (Duos) and i need enable lte band 20.
What I know on SM-N920CD is enabled.
Its possible flash modem from 920cd?
Or another tip? Maybe with root. I dont have problem with knox 1.
Thanks
I already asked the exact same question here http://forum.xda-developers.com/note5/help/sm-n9208-how-to-enable-b20-lte-band-t3207613

Unlock Band 20 ?

Hello,
Now with bootloader unlock & Root is it possible to Unlock Band 20 for 4G ?( actually i saw it used to cdma (800mhz) )
I live in France so i don't need CDMA , only 4G and GSM Band.
Regards,
X7ss said:
Hello,
Now with bootloader unlock & Root is it possible to Unlock Band 20 for 4G ?( actually i saw it used to cdma (800mhz) )
I live in France so i don't need CDMA , only 4G and GSM Band.
Regards,
Click to expand...
Click to collapse
Probably, search for those threads that show how to install the HTC modem driver and use QXDM to change the LTE bands. This is assuming that there is hardware support.
You can use NV Calculator or LTE Band Calculator to get the needed value.
You'll have to boot into bootloader and boot to BP Tools in order to install the modem driver on your computer.
hi tell me the spc code what u using I'm qxdm .. ?? mine 000000 is not working pls help me .. how to get spc code
aneeshmbabu said:
hi tell me the spc code what u using I'm qxdm .. ?? mine 000000 is not working pls help me .. how to get spc code
Click to expand...
Click to collapse
I don't think I've ever been prompted to enter a code in QXDM. Everything is done from the PC after booting BP Tools on the phone.
OK I will try
X7ss said:
Hello,
Now with bootloader unlock & Root is it possible to Unlock Band 20 for 4G ?( actually i saw it used to cdma (800mhz) )
I live in France so i don't need CDMA , only 4G and GSM Band.
Regards,
Click to expand...
Click to collapse
Sorry to disappoint you, but can't be done. Many people have tried to enable LTE band 20 on the Moto XT1225 (and it would be seemingly be more possible with that Quark variant which was sold internationally, rather than the U.S. XT1254)
Using NV calculator, QXDM, QPST, etc, the software changes will show LTE band 20 is enabled but you still won't actually receive/send any signal.

Can I Get band 71 on an unlocked ATT note 9.

I bought a SMN960U1 phone but ended up getting an unlocked ATT phone. Is there a way to flash it with Odin to get band 71 and 12?
I have read a bunch of posts and more confused than when I started. If you have a link to the correct version of Odin and ROM to flash I would be so grateful. I will keep looking through the posts in the mean time and will post back and answer my own question if I find an answer that works.
*update
Found post with wrong model number. It is missing the 9.
https://forum.xda-developers.com/ga...-to-sm-n60u1-unlocked-firmware-t3852685/page3
Would love to hear from anyone who has done the flash and if they get band 71.
It already has band 71 and band 12. It's supported natively by the hardware.
Mr. Orange 645 said:
It already has band 71 and band 12. It's supported natively by the hardware.
Click to expand...
Click to collapse
hmmm so you are saying the AT&T version has band 71 and I don't need to flash?
HonestOtter said:
hmmm so you are saying the AT&T version has band 71 and I don't need to flash?
Click to expand...
Click to collapse
AT&T does not have Band 71:
https://www.phonearena.com/news/Che...on-T-Mobile-and-Sprint-use-in-the-USA_id77933
But,if you are roaming on the networks that have Band 71 (T-Mobile & presumably the MVNOs that use T-Mobile's network),you should be able to use it w/o doing a thing.

4G not working in A1

Hi! 4G isnt working on my Mi9 with A1 network but they use the suported frequencies. I tried reseting APN and some other changes in developer options nothing worked. Any idea?
I'm gona try and flash the ROM when I unlock it from CN to global or EEA. which one should I chose if there is any big difference?
urbyx said:
Hi! 4G isnt working on my Mi9 with A1 network but they use the suported frequencies. I tried reseting APN and some other changes in developer options nothing worked. Any idea?
I'm gona try and flash the ROM when I unlock it from CN to global or EEA. which one should I chose if there is any big difference?
Click to expand...
Click to collapse
Which variant do you have? if it's the alita / explorer / transparent edition (8/256GB or 12/256GB) then there's NO BAND 20, which is LTE for many providers. Have you checked this?
EDIT: see here, perhaps you're in an area that doesn't use band 7 and only band 20? If this is the case... No ROM you flash can alter that, it's hardware related. ONLY global devices (64/128GB) support band 20
reg66 said:
Which variant do you have? if it's the alita / explorer / transparent edition (8/256GB or 12/256GB) then there's NO BAND 20, which is LTE for many providers. Have you checked this?
EDIT: perhaps you're in an area that doesn't use band 7 and only band 20? If this is the case... No ROM you flash can alter that, it's hardware related. ONLY global devices (64/128GB) support band 20
Click to expand...
Click to collapse
I have transparet ediotion 8/256gb. Checked there is no band 20 in my area but 4g works everywhere else
Should I still flash the ROM to global or eea? Can I relock it after or is it gona brick..
urbyx said:
I have transparet ediotion 8/256gb. Checked there is no band 20 in my area but 4g works everywhere else
Should I still flash the ROM to global or eea? Can I relock it after or is it gona brick..
Click to expand...
Click to collapse
Do not relock bootloader after flashing rom, it will most likely brick your device. Flash another ROM if you like but you won't get band 20
May I ask, why do you want to relock bootloader after flashing a new ROM?

Need help unlocking 4G LTE frequency bands

Hey guys, I have a Moto e5 play Verizon-branded phone so I can't unlock bootloader to root, is there any way to unlock handicapped frequency bands without root access?
-And another question: Can I flash it a global firmware?
Thanks for reading if you have any suggestions please leave a reply

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