yashsingh1/xdaforums huggingface dataset:
[Xiaomi Mi A1 Themes, Apps, and Mods] Xaviers101:
You know what? That search function is really useful. Look what i found:

https://xdaforums.com/showthread.php?p=78380969

You might wana ' search' next time.
[Xiaomi Mi A1 Themes, Apps, and Mods] Arn0ldx:
I already did this bro and broke all the signal that's why I am asking
[Xiaomi Mi A1 Themes, Apps, and Mods] Yamz18:
Im on AOSP pie version with latest Patch update, if im going to flash the December update will it work ?
[Xiaomi Mi A1 Themes, Apps, and Mods] ChasingHaze:
Im currently on custom rom pie and flashed december firmware(with modem) can i flash november based rom? O i have to flash stock rom and downgrade? Anyone i like to flash custom rom oreo again.
[Xiaomi Mi A1 Themes, Apps, and Mods] XtraWater:
the version from 9.0 from December 5 recognizes the SIM card and the carrier, but no audio on calls. Are there somewhere other modem sotware available? Or can I somehow extract the files from the Stock Pie software? What I have left is a backup from TWRP.
[Xiaomi Mi A1 Themes, Apps, and Mods] Rifqy Fahrezy:
Please, Help Me.

I have a problem with the signal.

even though, I have restored it :crying:

it's say "no service"

---------- Post added at 10:54 PM ---------- Previous post was at 10:40 PM ----------

I Am From Miui Epic Rom 8.1.0

No Signal "No Service"

But Imei is there.

Which one should I choose?

To Repair Missing Signals
[Xiaomi Mi A1 Themes, Apps, and Mods] Coboooo:
Sorry I'm Newbie. Where can I check firmware version. Under Android version I can see build number which is different to November or December firmware number
[Xiaomi Mi A1 Themes, Apps, and Mods] romantissm:
Here you are.
[Xiaomi Mi A1 Themes, Apps, and Mods] Coboooo:
Mine looks like this
[Xiaomi Mi A1 Themes, Apps, and Mods] jaggub4u:
Roll back to Stock 8.1

Hi Guys,

I had updated to PixelExperience_tissot-9.0-20181211-1038-OFFICIAL.zip and flashed firmware_V10.0.2.0.PDHMIFK.zip. now i wanna go back to stock rom. Please help
[Xiaomi Mi A1 Themes, Apps, and Mods] romantissm:
https://play.google.com/store/apps/details?id=com.finalwire.aida64
[Xiaomi Mi A1 Themes, Apps, and Mods] murtaza1326:
firmware 10.0.3 (latest beta stable)

bootloader+modem

made by me :) from latest update

https://drive.google.com/file/d/1q44nUtTt3h9jRjKxW80C3I5VfWLxcfjC/view?usp=drivesdk

enjoy :)
[Xiaomi Mi A1 Themes, Apps, and Mods] Ahmed Kassem:
[MENTION=4936496]joeyhuab[/MENTION] I flashed the december firmware (which just got removed from the op). I am on los 16. it was working fine with november firmware before installing that. Now if I install november again I get into a bootloop. I checked the zips and they seem to change the same files! so what's wrong with that? Why doesn't it work anymore? May you please guide me to a solution to this?

Edit: I solved this by restoring an old backup of efs with twrp.
[Xiaomi Mi A1 Themes, Apps, and Mods] Dior DNA:
Can you (or someone else) show ro.build.fingerprint from /system/build.prop

have a nice day
[Xiaomi Mi A1 Themes, Apps, and Mods] mfauzirahman:
is all LTE band available?
[Xiaomi Mi A1 Themes, Apps, and Mods] murtaza1326:
not for me but some have clean flashed this modem and they have all bands
[Xiaomi Mi A1 Themes, Apps, and Mods] mfauzirahman:
tq bro...will stick with nov
[Xiaomi Mi A1 Themes, Apps, and Mods] olistudent:
I lost most LTE bands when dirty flashing 10.0.3.0 firmware. So take a backup in twrp to be prepared...
[Xiaomi Mi A1 Themes, Apps, and Mods] Xaviers101:
Dirty flashed over nov or pie beta?
[Xiaomi Mi A1 Themes, Apps, and Mods] dabugen:
LTE b20 dead using December modem/Firmware.

b3 works fine. Any ideas?
[Xiaomi Mi A1 Themes, Apps, and Mods] olistudent:
Dirty flashed over Nov firmware. Tried with Havoc and PE. No stock.
[Xiaomi Mi A1 Themes, Apps, and Mods] jadephyre:
There are instructions to get the missing bands back, but they are more for advanced users and despite having done that before on a different phone, I won't try it on this one as this is my main device and I need it working. Try searching "Get LTE back" and you'll find it.
[Xiaomi Mi A1 Themes, Apps, and Mods] dabugen:
Would be happy to try, any link possibly? And you or whoever have got that working with the 10.0.3 modem?
[Xiaomi Mi A1 Themes, Apps, and Mods] jadephyre:
I didn't update to Pie or the latest modem after reading about all the problems it causes so I can't advise you there, likewise I am not responsible if you wreck your device: https://xdaforums.com/mi-a1/how-to/lte-t3854592
[Xiaomi Mi A1 Themes, Apps, and Mods] dabugen:
Thank you very much, I have B20 and several others working again on 10.0.3 firmware + Havoc OS 2.0 custom Pie ROM. Followed the tutorial and just in the end did something else to make it work. Posted my reply here in their thread: https://xdaforums.com/showpost.php?p=78586677&postcount=54
[Xiaomi Mi A1 Themes, Apps, and Mods] paolocorpo:
Very interesting

Inviato dal mio Mi A1 utilizzando Tapatalk
[Xiaomi Mi A1 Themes, Apps, and Mods] moinkhan0137:
Flashed November bootloader+modem zip file from OP over December firmware. Now phone stuck in bootloop!! I was on Latest LOS 15.1. Can anyone help?
[Xiaomi Mi A1 Themes, Apps, and Mods] Arief Darmawan:
Just going back to December firmware, u will be fine.

And don't try to revert back.
[Xiaomi Mi A1 Themes, Apps, and Mods] saski4711:
Did you make a backup of your EFS partition before flashing december fw? If so, restore it flash november fw and you should be good :)
[Xiaomi Mi A1 Themes, Apps, and Mods] moinkhan0137:
Yeah, flashed december firmware zip file which has been mentioned by someone in this thread and I'm out of that issue. Thanks for the warning though.

---------- Post added at 09:56 PM ---------- Previous post was at 09:54 PM ----------

Tried to restore efs partition before reflashing december firmware. But it didn't help.
[Xiaomi Mi A1 Themes, Apps, and Mods] Iceman66:
Xiaomi released for stock users an incremental update to 10.0.4.0 with new modemfiles. LTE Band 3 and 20 are working again after updating. Waiting for Joeyhuab to extract firmware from this update.
[Xiaomi Mi A1 Themes, Apps, and Mods] paolocorpo:
Yes ... but at now Xiaomi released 10.0.4.0 update only for beta testers !!

Edit

Arrived to normal user too ;)

Inviato dal mio Mi A1 utilizzando Tapatalk
[Xiaomi Mi A1 Themes, Apps, and Mods] manan001:
Anyone tried january modem?
[Xiaomi Mi A1 Themes, Apps, and Mods] joeyhuab:
January firmware now available: https://drive.google.com/open?id=1AIOYOrI_pRazDxRk-b-c6BMfz627OmkH
[Xiaomi Mi A1 Themes, Apps, and Mods] ibooth2004:
What are the correct steps to dirty flash this new pixel experience build and flash January firmware with it?
[Xiaomi Mi A1 Themes, Apps, and Mods] odyss199:
i think you might have mistakenly put the 8.1 link for the 9.0 firmware in the OP
[Xiaomi Mi A1 Themes, Apps, and Mods] joeyhuab:
Fixed. Thanks. :o
[Xiaomi Mi A1 Themes, Apps, and Mods] MustaceMan1143:
Flashed January firmware hoping the fingerprint stuff would be fixed....and my phone is bricked! Official PE from December 31st.
[Xiaomi Mi A1 Themes, Apps, and Mods] Dazeon:
Official update just arrived in the UK. Non-beta and 4G (LTE) working fine so far.
[Xiaomi Mi A1 Themes, Apps, and Mods] manan001:
Has anyone flashed january patch and facing issue with custom roms?
[Xiaomi Mi A1 Themes, Apps, and Mods] datasource:
I've flashed and using it with Los 16 without issues.
[Xiaomi Mi A1 Themes, Apps, and Mods] manan001:
Does lte works without any issue?
[Xiaomi Mi A1 Themes, Apps, and Mods] iamakii:
Bootloop?
[Xiaomi Mi A1 Themes, Apps, and Mods] 5i1v3rStorm:
Me too. No issues, coming from December FW. Band 20 is still present.
[Xiaomi Mi A1 Themes, Apps, and Mods] tacocowboy:
I flashed it on LOS 16, still missing LTE bands in Europe.

Any fix for this?
[Xiaomi Mi A1 Themes, Apps, and Mods] 5i1v3rStorm:
I only got them back via Stock. Downgraded to 7.11 and upgraded from there over 8.0 to Pie. Now Band20 is present on January as well as it was on December FW

https://xdaforums.com/mi-a1/development/rom-lineage-16-0-t3831780/page187
[Xiaomi Mi A1 Themes, Apps, and Mods] saski4711:
Anyone flashed the latest January Fw coming from November fw? I'm scared that I hardbrick my device again (flashed Jan. beta over 10.0.3.0 aby my device went dead)
[Xiaomi Mi A1 Themes, Apps, and Mods] 5i1v3rStorm:
You should be fine. The device is sort of touchy when it comes to LTE bands but I haven't heared of a hard brick due to a modem flash.

I'd suggest a Low Level Backup. This way you can restore nearly everything
[Xiaomi Mi A1 Themes, Apps, and Mods] saski4711:
Thx will try later today and keep my fingers crossed ;)
[Xiaomi Mi A1 Themes, Apps, and Mods] 5i1v3rStorm:
If you're stuck and wanna return you can restore your EFS and modem from TWRP, wipe cache and dirty-flash the ROM again. Worked for us flash-aholics in december :D
[Xiaomi Mi A1 Themes, Apps, and Mods] saski4711:
Yup already did that a couple of times no problem :cyclops:
[Xiaomi Mi A1 Themes, Apps, and Mods] Vel-San:
Quick question. If i flash this [TWRP] Stock Pie [9.0][V10.0.4.0 Stable][January Security Patch] do i still need to flash this modem in the thread? Or that should do it ?
[Xiaomi Mi A1 Themes, Apps, and Mods] saski4711:
Nope the modem files are already included in the stock ROM image. No need to install this fw this would be redundant flasheroo ;).
[Xiaomi Mi A1 Themes, Apps, and Mods] MustaceMan1143:
Yeah I fixed it!
[Xiaomi Mi A1 Themes, Apps, and Mods] manan001:
Is volte working in january patch. Currently i am on November patch.???
[Xiaomi Mi A1 Themes, Apps, and Mods] Jt380p:
Hi, I have a signal problem on LTE and wifi for a long time now. It all happened after I flashed liquid remix 10 4-5 months back. Now, whether using custom or stock rom, I get really poor signal strength. My wifi speed tested on other phones get 50mbps, but I get 0.07-2mbps. Will flashing this latest modem fix my problem?

Stock 9.0 Pie Jan patch (current).

P.s. I've already tried flashing with mi flash and resetting my phone.
[Xiaomi Mi A1 Themes, Apps, and Mods] manan001:
first try to use november firmware update. flash and reset the network from phone setting and than check it.

currently which rom r u using?
[Xiaomi Mi A1 Themes, Apps, and Mods] Jt380p:
Look above mate. -_-
[Xiaomi Mi A1 Themes, Apps, and Mods] Kousei Arima:
Can i flash the January modem over havoc os 13 Jan build already installed?Or is it not required in that build?
[Xiaomi Mi A1 Themes, Apps, and Mods] Keller0088:
Hello I just flashed this with latest havos os 2.1 and now touchscreen is inverted, it works very bad how can I fix it? it happens on twrp too so it is not a rom issue.
[Xiaomi Mi A1 Themes, Apps, and Mods] daviduzzo89:
Hi, I've just flashed january patch, but fingerprint is no longer available...how can I do?

---------- Post added at 02:38 PM ---------- Previous post was at 01:53 PM ----------

January patch disables fingerprint at all...And I cannot go back unless with flashing the stock rom...
[Xiaomi Mi A1 Themes, Apps, and Mods] daviduzzo89:
Other issue: no audio in phone calls with latest firmware...
[Xiaomi Mi A1 Themes, Apps, and Mods] troyinjapan:
Exactly what I'm experiencing. Doesn't make sense.
[Xiaomi Mi A1 Themes, Apps, and Mods] Dazeon:
I held off flashing any of the December updates (didn't want to lose B20) and went from stock Oreo (via MiFlash) to stock Pie, via the official OTA update for the UK. I then flashed the January firmware from here and the latest Havoc ROM. Absolutely no problems at all, albeit slightly slower charging. Fingerprint reader works perfectly.

I didn't install TWRP either, I just hot booted it from Fastboot for the installation process.
[Xiaomi Mi A1 Themes, Apps, and Mods] troyinjapan:
I don't want to go through the process of finding the stock ROM, playing with MiFlash and holding my breath etc. I tried a different ROM, and as suggested, flashed the January firmware, then the ROM. Still, had the same problems: no fingerprint and no SD Card recognition.

I can't recommend anyone flashing the January firmware. Total sh*tshow for me. I can live without my SD card for a while and the lack of a fingerprint reader is annoying, but I need my phone to work and don't want to invest any more time into flash and waiting for a while. Originally, I thought it was the ROM. My problems are definitely from the firmware update.
[Xiaomi Mi A1 Themes, Apps, and Mods] Rakesh rawap:
I was on Nov firmware and after flashing Jan firware my volte is broken now . Can anyone help me with his . Even I have my efs backup of Nov
[Xiaomi Mi A1 Themes, Apps, and Mods] jadephyre:
It is broken for everyone and currently there is no known fix for it. Stop messing around with it.
[Xiaomi Mi A1 Themes, Apps, and Mods] gusmao100:
Where was the January firmware link?
[Xiaomi Mi A1 Themes, Apps, and Mods] olistudent:
In the OP.
[Xiaomi Mi A1 Themes, Apps, and Mods] Raku@7:
Bro ,i accidentally flashed January modem on lineage 15.1 oreo, now it not booting, bro what to do now, i want to stay on lineage oreo, do u have January modem for oreo ?
[Xiaomi Mi A1 Themes, Apps, and Mods] paolocorpo:
Starting from December Mi A1 switched to Pie

You need to flash modem and firmware of november

Let see Op

Inviato dal mio Mi A1 utilizzando Tapatalk
[Xiaomi Mi A1 Themes, Apps, and Mods] infuerano:
Can anyone help me to find Joey's efs backup? I think I have broken my VOLTE.. :(
[Xiaomi Mi A1 Themes, Apps, and Mods] 5i1v3rStorm:
There definitely where links in the telegram group. Try there, sorry I can't help you any more, I went over to LOS.
[Xiaomi Mi A1 Themes, Apps, and Mods] paolocorpo:
I can't help you ... but I have my personal EFS+BOOT TWRP backup done with my Mi A1 when I was running OREO 8.1.0 + November 2018 patch + Magisk + Moun kernel 6.2

If you are interested into it ... please PM me

Ciao
[Xiaomi Mi A1 Themes, Apps, and Mods] infuerano:
Thanks, mate. But I successfully restored VOLTE
[Xiaomi Mi A1 Themes, Apps, and Mods] Tommes24:
Hi there,

I'm on Lineage 15.1 and I have had some network problems.

Today I've flashed the 8.1 November Patch and now I'm in Bootloop

Has anyone an idea to get back without wiping /data & int. storage ?

Wipe Sytem & flashing Lineage again I've already tried, but bootloop again :(
[Xiaomi Mi A1 Themes, Apps, and Mods] riccetto80:
worked? im on november too and was thinking maybe can be good to flash the last modem partition!
[Xiaomi Mi A1 Themes, Apps, and Mods] PipeSick:
How do u restore ur volte?
[Xiaomi Mi A1 Themes, Apps, and Mods] infuerano:
https://xdaforums.com/mi-a1/development/twrp-stock-8-1-0-t3856328/post78642510

After flashing i restore EFS backup and everything worked.. finally
[Xiaomi Mi A1 Themes, Apps, and Mods] joeyhuab:
I have updated the January firmware zip and have taken files from the January fastboot zip directly.

Please backup your EFS/Modem partitions through TWRP then update your firmwares to this zip. Link also added to the OP.
[Xiaomi Mi A1 Themes, Apps, and Mods] MeHR@N:
My phone imei and baseband was unknown and after I flashed 8.1.10 image over android 7. with flash_factory.bat script. now they are ok. but in *#*#4636#*#* menu Mobile radio power for sim1 is turning on and off continuously every 1 second and "no service" message appears every 1 second and sim2 is no service constantly. Does anyone knows that it is related to modem or modemst or something else?
[Xiaomi Mi A1 Themes, Apps, and Mods] thezinq:
What you have updated or fixed on this version? Is Volte icon present? Also what about LTE bands?
[Xiaomi Mi A1 Themes, Apps, and Mods] prorooter007:
Provide Changelog please
[Xiaomi Mi A1 Themes, Apps, and Mods] murtaza1326:
irony asking changelog for an firmware update as of same version ?
[Xiaomi Mi A1 Themes, Apps, and Mods] prorooter007:
Is it having volte icon?
[Xiaomi Mi A1 Themes, Apps, and Mods] murtaza1326:
for custom roms nope....
[Xiaomi Mi A1 Themes, Apps, and Mods] riccetto80:
the modem partition have inside the driver for the wifi too?
[Xiaomi Mi A1 Themes, Apps, and Mods] manan001:
I flashed latest jan modem firmware

All working well

Volte icone not show but lte working perfectly.

I use crdroid custom rom build 21 jan.steps followed was on nov modem

Took backup as described

Flashed dec rebooted to system

Again flashed jan through twrp
[Xiaomi Mi A1 Themes, Apps, and Mods] oasisfleeting:
Can you re-upload this? This is a catastrophic issue for me.
[Xiaomi Mi A1 Themes, Apps, and Mods] thezinq:
How many LTE bands are there? Please check it from Network Signal Guru and report me...
[Xiaomi Mi A1 Themes, Apps, and Mods] joeyhuab:
https://drive.google.com/file/d/1j8k1Td80igg1xd5aKdYDcy3YOfWReY69/view?usp=drivesdk
[Xiaomi Mi A1 Themes, Apps, and Mods] oasisfleeting:
Thank you. With this I was able to restore my efs setting my IMEI's to null and that allowed me to use qpst/qfil to reinstall my default imei's using an edited qcn file.

I am getting lte service once again.
[Xiaomi Mi A1 Themes, Apps, and Mods] yonas brown:
Can i use June, for my P latest update? Please...

My flutuation very extream....
[Xiaomi Mi A1 Themes, Apps, and Mods] Jt380p:
I have signal fluctuation, will this fix it? Though, I'm not sure if I have network fluctuation.
[Xiaomi Mi A1 Themes, Apps, and Mods] MKKLR21:
By mistake I flashed January modem to my A1 running LOS 15.1. Now I can't make phone calls (mic and speaker are dead in dialer). In other apps both mic and speaker work without issues. When I flash November modem, my device doesn't boot. Unfortunately I didn't take EFS backup. How can I go back to November modem?
[Xiaomi Mi A1 Themes, Apps, and Mods] Lord CESAR:
Version that can be flashed with Magisk?
[Xiaomi Mi A1 Themes, Apps, and Mods] dmbardal:
This has nothing to do with WiFi. This thread is just for flashing/fixing fluctuations in 3G/4G-signal.

Go here to fix your WiFi:

https://xdaforums.com/mi-a1/help/mi-a1-wifi-issue-flashing-stock-rom-t3781390

Do what OP did. It works.
[Xiaomi Mi A1 Themes, Apps, and Mods] manan001:
Can you please provide flashable twrp zip plz.
[Xiaomi Mi A1 Themes, Apps, and Mods] joeyhuab:
This is flashable through TWRP.
[Xiaomi Mi A1 Themes, Apps, and Mods] manan001:
Yes thank u.
[Xiaomi Mi A1 Themes, Apps, and Mods] joeyhuab:
Uploaded 8.1 leak modem to the OP. :)
[Xiaomi Mi A1 Themes, Apps, and Mods] binopech:
Im gonna try the leak version. Thank you for your work:svetius:
[Xiaomi Mi A1 Themes, Apps, and Mods] AkashAlien:
did u try modem. from leaked version? is it stable as rom is alpha
[Xiaomi Mi A1 Themes, Apps, and Mods] joeyhuab:
As far as I can see, the baseband version is the same with the original released with the device. So it's pretty stable too.
[Xiaomi Mi A1 Themes, Apps, and Mods] android.flasher0517:
Good day!

I'm currently on crDroid 4.2 and planning to flash the lealed modem. I have a very week network signal when inside our house and hoping that this will somehow improve it.

If ever I wanted to go back to the modem used by crDroid, do I just have to restore my full nandroid backup?
[Xiaomi Mi A1 Themes, Apps, and Mods] joeyhuab:
Hi. Modem file is separated from the ROM. So even if you want to revert to old modem, it's useless because it's not part of crDroid.
[Xiaomi Mi A1 Themes, Apps, and Mods] android.flasher0517:
How will I revert to my current modem?
[Xiaomi Mi A1 Themes, Apps, and Mods] joeyhuab:
If may I ask, what's the point in reverting? You said it yourself, network is already unstable with your current modem. I suggest you iust stick to the one you are flashing. Reverting is not an option here. :)
[Xiaomi Mi A1 Themes, Apps, and Mods] android.flasher0517:
Well I'm just asking in case this modem worsen my current condition.
[Xiaomi Mi A1 Themes, Apps, and Mods] joeyhuab:
Try it out, when it worsens, flash the one from 8.1 Beta. :)
[Xiaomi Mi A1 Themes, Apps, and Mods] manan001:
Can u update the may modem from new release plz
[Xiaomi Mi A1 Themes, Apps, and Mods] joeyhuab:
Will do when I get the file. :)
[Xiaomi Mi A1 Themes, Apps, and Mods] Vel-San:
Is may 5th the latest one? Nothing newer?
[Xiaomi Mi A1 Themes, Apps, and Mods] cahyo_diegol:
Work on custom rom???
[Xiaomi Mi A1 Themes, Apps, and Mods] kemdroid:
Yep
[Xiaomi Mi A1 Themes, Apps, and Mods] joeyhuab:
https://drive.google.com/file/d/1j8k1Td80igg1xd5aKdYDcy3YOfWReY69/view?usp=drivesdk

Extract the 7z and restore the files in TWRP
[Xiaomi Mi A1 Themes, Apps, and Mods] MKKLR21:
Thanks. I'm up and running again. You're my hero.
[Xiaomi Mi A1 Themes, Apps, and Mods] joeyhuab:
No problem!
[Xiaomi Mi A1 Themes, Apps, and Mods] XtraWater:
I'm on rr 6.2 final. I didn't update the modem. I wonder if the following issue is somehow related to that:

OK Google works perfect with a headset. But not when the headset is disconnected. Then it should use the inbuilt mic.

The mic is fine since calls and recording audio is OK. Some suggestions?
[Xiaomi Mi A1 Themes, Apps, and Mods] Jt380p:
Thank you so much mate! This fixed my problem (somewhat). At first, it made no difference, but then a day later, I forgot to set to LTE/WDCMA. It's all fixed, except for 3G, it still slow, but 4G is fully working.
[Xiaomi Mi A1 Themes, Apps, and Mods] vargab.vk:
Loosing my calling functionality after flashing January firmware on PE latest build. How can i fix this issue?
[Xiaomi Mi A1 Themes, Apps, and Mods] thezinq:
Have you flashed it directly over Nov firmware?
[Xiaomi Mi A1 Themes, Apps, and Mods] vargab.vk:
Yes, want should I had to do?
[Xiaomi Mi A1 Themes, Apps, and Mods] Arief Darmawan:
Doing it step by step. Do not jump from Nov to January.
[Xiaomi Mi A1 Themes, Apps, and Mods] thezinq:
Have you backed up your efs?
[Xiaomi Mi A1 Themes, Apps, and Mods] vargab.vk:
What are the steps? Can you please explain.

---------- Post added at 06:13 AM ---------- Previous post was at 06:13 AM ----------

Yes bro

---------- Post added at 06:17 AM ---------- Previous post was at 06:13 AM ----------

Can anyone provide me the December firmware.
[Xiaomi Mi A1 Themes, Apps, and Mods] thezinq:
Follow this steps...

Step 1... Boot to TWRP

Step 2... Flash November firmware

Step 3... Restore only efs from TWRP

Step 4... Reboot system

Step 5... Boot TWRP and flash December firmware

Step 6... Reboot system

Step 7... Boot TWRP and flash January firmware
[Xiaomi Mi A1 Themes, Apps, and Mods] vargab.vk:
Thanks mate it worked.
[Xiaomi Mi A1 Themes, Apps, and Mods] beevk:
Microphone not working

I installed Lineage OS 15.1-20190215-nightly but there was no network (IMEI was fine though). So I flashed January patch through TWRP and then reinstalled Lineage OS. My microphone isn't working at all now. Lineage OS 15.1-20190215 has Feb security update, So I'm a little confused now. Did I install something wrong? How can I fix this?

Device: MI A1 (Tissot)
[Xiaomi Mi A1 Themes, Apps, and Mods] KaaMyA:
Try to go back to previous rom version, then flash January patch, after that reboot system and go Twrp again to do clean flash.

Remember, dalvik, system and Data have to be wiped.

In my case, I have treble on my device, so I wiped both slots.
[Xiaomi Mi A1 Themes, Apps, and Mods] Fractals:
[MENTION=4936496]joeyhuab[/MENTION] please update to feb patch
[Xiaomi Mi A1 Themes, Apps, and Mods] joeyhuab:
You have the link?
[Xiaomi Mi A1 Themes, Apps, and Mods] KaaMyA:
I suppose he meant february LOS build, not the Firmware patch itself.
[Xiaomi Mi A1 Themes, Apps, and Mods] Arief Darmawan:
Do u know what are u talking about?
[Xiaomi Mi A1 Themes, Apps, and Mods] joeyhuab:
LOS? Wrong thread, I guess. This is for the firmware files flashable for all custom ROMs. Not just LOS.
[Xiaomi Mi A1 Themes, Apps, and Mods] NicoNewbie:
Feb 2019 OTA link: https://android.googleapis.com/pack.../b8f98a6ad3ddb0773a65a583df680e77b8ce6085.zip
[Xiaomi Mi A1 Themes, Apps, and Mods] joeyhuab:
DOWNLOAD

February firmware: Based on stock V10.0.5.0.PDHMIXM update
[Xiaomi Mi A1 Themes, Apps, and Mods] saski4711:
Thank you! Still no VoLTE after flashing this using LOS16 though :rolleyes:.
[Xiaomi Mi A1 Themes, Apps, and Mods] MKKLR21:
Did you try dialing *#*#86583#"#* ? Have you added ims to default apn?
[Xiaomi Mi A1 Themes, Apps, and Mods] iSEKAI:
Guys can someone explained what the difference between ROM and FIRMWARE ?