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OnePlus 2 Unknown Baseband | Unknown IMEI number | no network | no wifi | help

So i was flashing Hydrogen Os v2.5 through twrp and since 20 mins the .zip file did not flash so i switched off the phone and when i tried re-installing h2os v2.5 it was again taking longer to flash so i turned the phone off again and this time i installed oxygen os v3.1.0 ,for sometime the phone was in bootloop but when it booted there was no wifi, no network and i found that my phone had no imei number plus unknown baseband, unknown bluetooth also i don't have an efs backup can anyone help me restore my phone to normal once again?

point here.

phorcus said:
So i was flashing Hydrogen Os v2.5 through twrp and since 20 mins the .zip file did not flash so i switched off the phone and when i tried re-installing h2os v2.5 it was again taking longer to flash so i turned the phone off again and this time i installed oxygen os v3.1.0 ,for sometime the phone was in bootloop but when it booted there was no wifi, no network and i found that my phone had no imei number plus unknown baseband, unknown bluetooth also i don't have an efs backup can anyone help me restore my phone to normal once again?
Click to expand...
Click to collapse
Same happened with me phone doesn't boot... Can't install recovery...
Nothing works tried all possible ways like hard reset

what recovery are you guys using?
---------- Post added at 03:26 AM ---------- Previous post was at 03:24 AM ----------
This version works with TWRP 302.2, make sure you are using that.. DO NOT use stock recovery..
---------- Post added at 03:32 AM ---------- Previous post was at 03:26 AM ----------
The ideal way to flash h2os is, flash the rom, flash the debloater, dont flash gapps at all.. boot into the rom, the first boot takes a lot of time so dont worry as long as the phone is not rebooting again and again.. once it boots up go through the setup, dont use oneplus account, then install the google installer apk..
https://www.techmesto.com/install-hydrogen-os-google-apps-oneplus-2/
then follow the procedure written in this link to install gapps.. and you're done.. you can use h2os 2.5 now!
Reverting back to OOS 3.1, I have not tried myself.. Maybe, get into recovery (twrp) do a factory reset first after going into wipe, then go into advanced wipe, wipe everything EXCEPT internal storage.. then flash OOS 302 instead of OOS 3.1, and see if it working with all the connectivity. THIS PROCEDURE IS NOT TESTED BY ME!!

As far as I know, the current oxygen version does not support the latest modem.. So you have two options..
1) install HOS again and like the above method use as it is
2) install HOS again to regain the networks(don't install gApps) and then using latest twrp, do a clean install of cm14.1 official.. But cm14.1 official with the latest modem is highly unstable if you use the mobile network..
My recommendation is to stick to the beta version of HOS for a few days and continue using it if you like it or flash cm14.1 once a stable build supporting the newer modem comes.. And when the updated oxygen OS comes in this or the next month, you can install it!

zipalign said:
point here.
Click to expand...
Click to collapse
thank you for your help so i was on mokee 7.1 when i flashed only this hydrogen modem v1.1 and when i booted i did not find any volte option, so i went back to latest twrp recovery and tried flashing h2os v2.5 but since 20 minutes i was seeing this ( https://2.bp.blogspot.com/-s77sPKpb...600/Screenshot_1970-01-01-06-55-47%5B1%5D.png ) so i switched off my phone midway and then i installed oxygen os v3.1.0 although it got into a boot loop but when it booted there was no wifi, no imei no, no baseband and many more and when i tried installing mokee or cm14.1 again although they got flashed but when i booted my device i saw oneplus logo and for a few seconds i also saw cm logo and the device continuously kept rebooting in a loop also i am only able to flash oxygen os v3.1.0 that too with no wifi, no imei etc. whereas cm14.1 and mokee wouldnt even boot but they do get flashed and h2os wouldnt even flash , please help :crying:

shravansp24 said:
As far as I know, the current oxygen version does not support the latest modem.. So you have two options..
1) install HOS again and like the above method use as it is
2) install HOS again to regain the networks(don't install gApps) and then using latest twrp, do a clean install of cm14.1 official.. But cm14.1 official with the latest modem is highly unstable if you use the mobile network..
My recommendation is to stick to the beta version of HOS for a few days and continue using it if you like it or flash cm14.1 once a stable build supporting the newer modem comes.. And when the updated oxygen OS comes in this or the next month, you can install it!
Click to expand...
Click to collapse
thanks for writing out, but i am unable to flash H2OS it is taking forever to install, it just says " patching system image unconditionally " i tried installing it through latest twrp and i tried hybrid recovery too

Rohandd said:
what recovery are you guys using?
---------- Post added at 03:26 AM ---------- Previous post was at 03:24 AM ----------
This version works with TWRP 302.2, make sure you are using that.. DO NOT use stock recovery..
---------- Post added at 03:32 AM ---------- Previous post was at 03:26 AM ----------
The ideal way to flash h2os is, flash the rom, flash the debloater, dont flash gapps at all.. boot into the rom, the first boot takes a lot of time so dont worry as long as the phone is not rebooting again and again.. once it boots up go through the setup, dont use oneplus account, then install the google installer apk..
https://www.techmesto.com/install-hydrogen-os-google-apps-oneplus-2/
then follow the procedure written in this link to install gapps.. and you're done.. you can use h2os 2.5 now!
Reverting back to OOS 3.1, I have not tried myself.. Maybe, get into recovery (twrp) do a factory reset first after going into wipe, then go into advanced wipe, wipe everything EXCEPT internal storage.. then flash OOS 302 instead of OOS 3.1, and see if it working with all the connectivity. THIS PROCEDURE IS NOT TESTED BY ME!!
Click to expand...
Click to collapse
i am using twrp-3.0.2-2-oneplus2.img but h2os takes forever to install, but i did flash h2os v2.5's modem v1.1 before flashing h2os v2.5.

i am also seeing this message in twrp " Failed to mount /system (invalid argument) " please help guys

Flashing h2os does take more time than usually flashing other roms.. maybe 10 mins or so.. but not 20-25 mins.. and ideally 302.2 should work with h2os without any issues.. I am using that right now.. i can boot into recovery and everything.. I'm not really sure what is the problem here now..
---------- Post added at 05:01 AM ---------- Previous post was at 05:00 AM ----------
shravansp24 said:
As far as I know, the current oxygen version does not support the latest modem.. So you have two options..
1) install HOS again and like the above method use as it is
2) install HOS again to regain the networks(don't install gApps) and then using latest twrp, do a clean install of cm14.1 official.. But cm14.1 official with the latest modem is highly unstable if you use the mobile network..
My recommendation is to stick to the beta version of HOS for a few days and continue using it if you like it or flash cm14.1 once a stable build supporting the newer modem comes.. And when the updated oxygen OS comes in this or the next month, you can install it!
Click to expand...
Click to collapse
I did return to cm14.1 by seraph after flashing h2os.. and i did not experience any random reboots with mobile data on 4g.. im using vodafone and idea..

Rohandd said:
Flashing h2os does take more time than usually flashing other roms.. maybe 10 mins or so.. but not 20-25 mins.. and ideally 302.2 should work with h2os without any issues.. I am using that right now.. i can boot into recovery and everything.. I'm not really sure what is the problem here now..
---------- Post added at 05:01 AM ---------- Previous post was at 05:00 AM ----------
I did return to cm14.1 by seraph after flashing h2os.. and i did not experience any random reboots with mobile data on 4g.. im using vodafone and idea..
Click to expand...
Click to collapse
I didnt try the seraph build.. Will try it! Thank you
phorcus said:
thanks for writing out, but i am unable to flash H2OS it is taking forever to install, it just says " patching system image unconditionally " i tried installing it through latest twrp and i tried hybrid recovery too
Click to expand...
Click to collapse
Yeah itll show that message and will last for 5-10mins.. Hydrogen is very slow to install.. If it lasts longer, try flashing the recovery again and trying it..! Or directly flash cm14.1 to see if its booting

Rohandd said:
Flashing h2os does take more time than usually flashing other roms.. maybe 10 mins or so.. but not 20-25 mins.. and ideally 302.2 should work with h2os without any issues.. I am using that right now.. i can boot into recovery and everything.. I'm not really sure what is the problem here now..
---------- Post added at 05:01 AM ---------- Previous post was at 05:00 AM ----------
I did return to cm14.1 by seraph after flashing h2os.. and i did not experience any random reboots with mobile data on 4g.. im using vodafone and idea..
Click to expand...
Click to collapse
can you please check this screenshot ( https://2.bp.blogspot.com/-s77sPKpb...600/Screenshot_1970-01-01-06-55-47%5B1%5D.png )

shravansp24 said:
I didnt try the seraph build.. Will try it! Thank you
Yeah itll show that message and will last for 5-10mins.. Hydrogen is very slow to install.. If it lasts longer, try flashing the recovery again and trying it..! Or directly flash cm14.1 to see if its booting
Click to expand...
Click to collapse
i reflashed the recovery and installed cm14.1 but then the device gets into boot loop,what's the problem here?

phorcus said:
i reflashed the recovery and installed cm14.1 but then the device gets into boot loop,what's the problem here?
Click to expand...
Click to collapse
Even i got into a bootloop after flashing RR or cm14.1.. Dont know the exact issue..
But installing the new h2os, booting it and then clean flashing cm14.1 solved the bootloop issue..!

shravansp24 said:
Even i got into a bootloop after flashing RR or cm14.1.. Dont know the exact issue..
But installing the new h2os, booting it and then clean flashing cm14.1 solved the bootloop issue..!
Click to expand...
Click to collapse
can you tell me the steps you followed to install h2os? cause when i am installing it, it takes forever to install like i waited for almost 20 mins before giving up, or should i wait more?
and did you get the same message as i got like " failed to mount /dev/block/bootdevice........and so on..... device or resource busy "
check the screenshot here ( https://2.bp.blogspot.com/-s77sPKpb...600/Screenshot_1970-01-01-06-55-47%5B1%5D.png )

phorcus said:
can you tell me the steps you followed to install h2os? cause when i am installing it, it takes forever to install like i waited for almost 20 mins before giving up, or should i wait more?
and did you get the same message as i got like " failed to mount /dev/block/bootdevice........and so on..... device or resource busy "
check the screenshot here ( https://2.bp.blogspot.com/-s77sPKpb...600/Screenshot_1970-01-01-06-55-47%5B1%5D.png )
Click to expand...
Click to collapse
1) Got into recovery
2) wipe-advanced wipe-everything except internal storage
3) install-HOS rom
(took around 5 minutes)
4) boot rom and finish initial setup
5) Got into recovery
6) wipe-advanced wipe-everything except internal storage
7) install-cm14.1 rom + gapps
8) boot
Maybe your rom is corrupt, try redownloading and im using latest twrp

shravansp24 said:
1) Got into recovery
2) wipe-advanced wipe-everything except internal storage
3) install-HOS rom
(took around 5 minutes)
4) boot rom and finish initial setup
5) Got into recovery
6) wipe-advanced wipe-everything except internal storage
7) install-cm14.1 rom + gapps
8) boot
Maybe your rom is corrupt, try redownloading and im using latest twrp
Click to expand...
Click to collapse
Thank a lot Bro that worked like a charm the downloaded file was corrupt but i got only one network and i am still on h2os, did you get both networks on cm 14.1?

phorcus said:
Thank a lot Bro that worked like a charm the downloaded file was corrupt but i got only one network and i am still on h2os, did you get both networks on cm 14.1?
Click to expand...
Click to collapse
I got both networks to work in cm14.1 but theyre extremely unstable.. I have my phone in flight mode most of the time to avoid reboots.. Wifi works fine.. The moment you activate the sim, it depends on your luck then.. Mine worked 10mins, sometimes 15, then reboots, again 5-10mins and again reboot(tried official as well as seraph's)

shravansp24 said:
I got both networks to work in cm14.1 but theyre extremely unstable.. I have my phone in flight mode most of the time to avoid reboots.. Wifi works fine.. The moment you activate the sim, it depends on your luck then.. Mine worked 10mins, sometimes 15, then reboots, again 5-10mins and again reboot(tried official as well as seraph's)
Click to expand...
Click to collapse
everything is back to normal on my phone, actually i visited the service center today and they told me that my phone is dead and that i would need to pay 17k to change the motherboard :laugh:

problem here is that H2OS 2.5 messed up all our modems, and who has not made OOS EFS backup via terminal is in trouble now.
when problem popped up in all forums [XDA, and OnePlus one mainly] there have been proposed several solutions, like flashing H2OS modem .zip via recovery, after installing OOS.
so now many users have different scenarios to approach, and a working allwide solution seems not to be found 'til now.
personally I have official TWRP 3.0.2-2 and all my flashings have been made with it.
started from OOS 3.1.0 I had on my phone in the last week, 100% working, then flashed H2OS 2.5. seen the new ROM, decided to get back to something more familiar, so I wiped all and flashed latest nightly of CM13. it was working like a charm, but I had bluetooth issues with my xiaomi mi band [like I always had with OP2 and CM13], so I decided to flash back OOS 3.1.0 wiping data.
OOS 3.1.0 booted up, but without connectivity.
then I realized my modems have been messed up, and started looking for a solution.
the only one I'd try is to fastboot flash OOS 3.0.2 .zip [kindly uploaded by Spannaa], and see if my phone starts working again like it should.
'til now, I will stay with H2OS 2.5 which works perfectly. but when I have time, I'll empty my phone backupping all my stuff [fastboot flashing the .zip mentioned above will wipe userdata too, so I'd lose all my stuff] and try the fastboot thing [I already did it a few months ago, no issues at all].
for those who are in big trouble, that cannot flash anything from recovery, I'd suggest to try to fastoboot flash OOS 3.0.2 with the .zip linked above.
if this solution still doesn't come to an happy ending, then you have to try with the unbrick tool from Qualcomm and see what will happen.
the most important thing is and always will be: don't do anything until you are not aware of what you're actually doing to your phone.

Still No VoLTE for Redmi2 8gb variant

Hello, I currently am using a jio sim as my primary sim. However, i tried all the methods suggested on xda but still no volte.
List of things that i have tried:-
1. Tried flashing the modem(doesn't work at all)
2. Flashing MIUI 7.5 version as suggested( V7.5.2.0.LHJMIDE_20160629.0000.25_5.1_global ) to be precise
3. Tried flashing another one of Redmi2 Prime's firmware(global developer rom)
4. And tried flashing several other ROMs(Orion OS, RR, Tesla, AOSP and DU) after doing step2 and still no volte support found
Can anybody help me?

@cypherx1998 Flash kitkat dev rom 7.1.5 or newer from fastboot, after it starts booting turn of your device and boot into fastboot, then flash the latest lollipop dev rom and boot into it, setup your device, then go to settings, mobile data (I think, it's where you have the option to change to 3g and 4g data) and enable VoLTE voice calls, after that, reboot into fastboot and flash TWRP 3.0.2-0, then go to wipe, advanced wipe, select:
cache/dalvik-cache
system
data
internal storage
and then wipe, after that go to wipe again, select cache, then "change partition format" select F2FS, and swipe to apply, do the same thing for data, don't do on dalvik-cache and system, or else this may brick your device.
Then flash the wt88047 firmware avaliable on LineageOS second or third post, do a full wipe again, install VoLTE universal Patch Here do a full wipe again, then flash the latest LineageOS build, after wipe only cache and data, flash OpenGapps pico arm android 7.1.1 and reboot.
You will have VoLTE

Try to flash RR 5.8.0 nought ROM. U will have voLTe working on ur device. I am currently using that ROM. Go for it

Shashank Varma said:
Try to flash RR 5.8.0 nought ROM. U will have voLTe working on ur device. I am currently using that ROM. Go for it
Click to expand...
Click to collapse
No... I didn't get VoLTE...
I am using the same ROM.
---------- Post added at 09:27 AM ---------- Previous post was at 09:24 AM ----------
If u want VoLTE u will have to flash the redmi 2 prime rom either fastboot or recovery...
However ur device will start lagging and ur free ram won't go higher than 300 MB.
http://bigota.d.miui.com/6.7.5/wt88....5_20160523.0000.23_5.1_global_53ff97d6ba.tgz
And the recovery one is::
http://bigota.d.miui.com/6.7.5/miui_HM2XWCProGlobal_6.7.5_8673db6ce3_5.1.zip

voLte is working for sim1. See the screenshot below

Volte works just flash latest wxcpro ROM by editing its script so that it won't say 'this ROM is for so and so ****'

Shashank Varma said:
voLte is working for sim1. See the screenshot below
Click to expand...
Click to collapse
How can that screenshot say that VoLTE is working??? I can't see any HD or VoLTE sign..

U can see there enhanced 4g LTE mode which means volte.

Shashank Varma said:
U can see there enhanced 4g LTE mode which means volte.
Click to expand...
Click to collapse
Nope bro!!! I don't think that's VoLTE! Coz I have got that enabled and I can't call using a Jio SIM!!

Didnt work
TecnoTailsPlays said:
@cypherx1998 Flash kitkat dev rom 7.1.5 or newer from fastboot, after it starts booting turn of your device and boot into fastboot, then flash the latest lollipop dev rom and boot into it, setup your device, then go to settings, mobile data (I think, it's where you have the option to change to 3g and 4g data) and enable VoLTE voice calls, after that, reboot into fastboot and flash TWRP 3.0.2-0, then go to wipe, advanced wipe, select:
cache/dalvik-cache
system
data
internal storage
and then wipe, after that go to wipe again, select cache, then "change partition format" select F2FS, and swipe to apply, do the same thing for data, don't do on dalvik-cache and system, or else this may brick your device.
Then flash the wt88047 firmware avaliable on LineageOS second or third post, do a full wipe again, install VoLTE universal Patch Here do a full wipe again, then flash the latest LineageOS build, after wipe only cache and data, flash OpenGapps pico arm android 7.1.1 and reboot.
You will have VoLTE
Click to expand...
Click to collapse
Took me time to try this...but didnt work.....you might think that i didnt follow the steps properly..but i did and i verified on each step that i was doing it the right way....but sadly it didnt work

You may try Redmi 2 Prime ROM (stable or dev) for some days..Check whether you get VoLTE on that ROM or not.. If yes then use that for some days maybe 2 or 3 days..It will be slow at first then after 2 to 3 hours of use u will feel no lag..I was using Developer version for 2-3 months which was fine for daily driver..I just faced storage issue..Then I tried stable version, and the same issue was there.. So I decided to use some custom ROMs and I Flashed AOSP Extended (Nougat)..VoLTE works fine and the ROM is so much smooth with good battery backup..But due to slow internet speed I am using Mokee 7.1 right now.. You can try using R2P ROM for some days...If VoLTE works there then it will work on other ROMs too( as per my experience).
Ignore my english...

Ofnigamer said:
You may try Redmi 2 Prime ROM (stable or dev) for some days..Check whether you get VoLTE on that ROM or not.. If yes then use that for some days maybe 2 or 3 days..It will be slow at first then after 2 to 3 hours of use u will feel no lag..I was using Developer version for 2-3 months which was fine for daily driver..I just faced storage issue..Then I tried stable version, and the same issue was there.. So I decided to use some custom ROMs and I Flashed AOSP Extended (Nougat)..VoLTE works fine and the ROM is so much smooth with good battery backup..But due to slow internet speed I am using Mokee 7.1 right now.. You can try using R2P ROM for some days...If VoLTE works there then it will work on other ROMs too( as per my experience).
Ignore my english...
Click to expand...
Click to collapse
Yes just flash either the dev or stable Redmi 2 Prime ROM. I can say that this works because I have flashed it on as many as three devices. Just go to this link and find out Redmi 2 Prime Global Developer ROM or Global Stable ROM.
http://en.miui.com/a-234.html
Remember these are to be flashed in fastboot. After flashing this, you can flash any Nougat based ROM like LOS, RR, AEX, cRDroid, etc to enjoy VoLTE on those ROMs too.

cypherx1998 said:
Hello, I currently am using a jio sim as my primary sim. However, i tried all the methods suggested on xda but still no volte.
List of things that i have tried:-
1. Tried flashing the modem(doesn't work at all)
2. Flashing MIUI 7.5 version as suggested( V7.5.2.0.LHJMIDE_20160629.0000.25_5.1_global ) to be precise
3. Tried flashing another one of Redmi2 Prime's firmware(global developer rom)
4. And tried flashing several other ROMs(Orion OS, RR, Tesla, AOSP and DU) after doing step2 and still no volte support found
Can anybody help me?
Click to expand...
Click to collapse
1)download Mi flash tool
http://en.miui.com/forum.php?mod=attachment&aid=NzYzMjQzfGFlZDEyMDMzfDE0NzI1NDg5MDJ8ODE5MTF8MzM2MTg0
2)
download fastboot rom redmi 2 prime global stable or china
http://bigota.d.miui.com/V8.1.3.0.L...DI_20161230.0000.00_5.1_global_23ac47dab8.tgz
above is global stable link.
3) put your phone in fastboot mode, unzip the downloaded rom. (avoid spaces in between folder path/name eg "C:\New Folder\Extracted rom\...." is not allowed instead it should be like C:\New_Folder\Extracted_rom\.......)
4) open mi flashing tool see if your device is listed. refresh to see. select clean all (flash_all.bat) option from bottom of mi flashing tool.
5) click on flash, and let it boot.
you would be able to use VoLTE now in miui rom. if you want to change to any N based roms just flash twrp and clean install any rom.

Flashing the MIUI 7.5.2 global ROM should work. Wipe everything and do a clean install. Once you see an indication of VOLTE on the MIUI then you should be able to get the same in other ROMS. I just did it recently.

Flash the redmi 2 prime rom using any of the methods fast boot or normal. If VoLte is what u r looking for

cypherx1998 said:
Hello, I currently am using a jio sim as my primary sim. However, i tried all the methods suggested on xda but still no volte.
List of things that i have tried:-
1. Tried flashing the modem(doesn't work at all)
2. Flashing MIUI 7.5 version as suggested( V7.5.2.0.LHJMIDE_20160629.0000.25_5.1_global ) to be precise
3. Tried flashing another one of Redmi2 Prime's firmware(global developer rom)
4. And tried flashing several other ROMs(Orion OS, RR, Tesla, AOSP and DU) after doing step2 and still no volte support found
Can anybody help me?
Click to expand...
Click to collapse
I think i can help you dude. Flash this fastboot rom you have. Boot it with YOUR Jio sim in the first sim slot inside. Setup everything normally in the phone. After it booted, you WILL see the Volte symbol in the statusbar.
Now root it and install TWRP. Now install a Volte rom of your choice. It has to work.
I will say you why this has to work. I own this device. The 8GB variant. My friend owns the same device. While my device had Volte working, his' didn't work. I checked it. He had kitkat bootloader. Then i flashed the lollipop stock rom in his device in fastboot mode. i directly rooted the device and installed cm14.1 in his device. Still no Volte. I wondered what the fcuk was just happening. My friend was like i'll cope up with this dude. I'll use jio 4g voice. But couldn't leave it like that. I tried it the second time just like i have told you and then VOLTE STARTED ****ING WORKING MAN !!! I was on cloudnine !!! Just helping you out !!
I think the reason Volte was not working is because the jio sim needed the stock rom to trigger it to start Volte sevices. Before it, the jio must have thought "yeah, this is a non volte device ". Just saying !!
Have a nice day !!!

Sankar Bharani said:
I think i can help you dude. Flash this fastboot rom you have. Boot it with YOUR Jio sim in the first sim slot inside. Setup everything normally in the phone. After it booted, you WILL see the Volte symbol in the statusbar.
Now root it and install TWRP. Now install a Volte rom of your choice. It has to work.
I will say you why this has to work. I own this device. The 8GB variant. My friend owns the same device. While my device had Volte working, his' didn't work. I checked it. He had kitkat bootloader. Then i flashed the lollipop stock rom in his device in fastboot mode. i directly rooted the device and installed cm14.1 in his device. Still no Volte. I wondered what the fcuk was just happening. My friend was like i'll cope up with this dude. I'll use jio 4g voice. But couldn't leave it like that. I tried it the second time just like i have told you and then VOLTE STARTED ****ING WORKING MAN !!! I was on cloudnine !!! Just helping you out !!
I think the reason Volte was not working is because the jio sim needed the stock rom to trigger it to start Volte sevices. Before it, the jio must have thought "yeah, this is a non volte device ". Just saying !!
Have a nice day !!!
Click to expand...
Click to collapse
How do you check what bootloader you're on currently?

cypherx1998 said:
How do you check what bootloader you're on currently?
Click to expand...
Click to collapse
I think their is no(simple) way to know that.But you can try a app named "phone info". But it didn't work out for me.It is showing unknown bootloader.
The best way to know your bootloader version is " try to remember which miui ROM u flashed last".
Or there is lolypop firmware in lineage is thread for u.

cypherx1998 said:
How do you check what bootloader you're on currently?
Click to expand...
Click to collapse
Simple. Press vol down and power. will boot into fastboot mode.
If the letters saying FASTBOOT are in green color and small, it is in KitKat bootloader. If the letters saying FASTBOOT are in Blue color and little big, it is Lollipop. I know it sounds a little lame, but trust me, this is a reliable method. If you flashed the lollipop rom via the mi Flash application through system, and youve got the blue colored bootloader, then you are on lollipop bootloader

SankarWayne said:
Simple. Press vol down and power. will boot into fastboot mode.
If the letters saying FASTBOOT are in green color and small, it is in KitKat bootloader. If the letters saying FASTBOOT are in Blue color and little big, it is Lollipop. I know it sounds a little lame, but trust me, this is a reliable method. If you flashed the lollipop rom via the mi Flash application through system, and youve got the blue colored bootloader, then you are on lollipop bootloader
Click to expand...
Click to collapse
well atleast now i know i'm on lollipop bootloader.....but still no volte man

Help..Lost volte support

I lost volte support after flashing rr. N rom please help me I don't have PC to flash fastboot rom .

ankit sandel said:
I lost volte support after flashing rr. N rom please help me I don't have PC to flash fastboot rom .
Click to expand...
Click to collapse
Someone recently told you have to flash stock ROM to get VOLTE again, that's not true (completely).
Truth is, you just need to boot stock ROM (only if you lost volte support while flashing custom ROMs, it will not work if your modem is defected.)
For, without PC,
Restore stock backup if you have,
Otherwise flash jerome's modified ROM.
Boot it, you will have VOLTE back. (Sometimes volte comes back on first boot or reboot will make it.)
I have lost VOLTE many times while testing OreO ROMs, and got back by restoring STOCK TWRP backup...

I am unable to get volte even after restoring and flashing jeromies rom .. Can you please tell me any other way to get it back.

VOLTE Missing After Re-Flashing Stock ROM

!Need Help!
i flashed Custom ROM RR Havoc OS etc faced some problem with that rom's so switched back to Stock ROM Android Pie but MY Volte Was not working on Both sim Jio And Airtel 4G is Working Fine(Earlier VoLTE was Working)
so i first flashed Stock pie Downloaded from MI website (tissot_images_V10.0.4.0.PDHMIXM_20190104.0000.00_9.0_2cee840c96)
Volte was not working so i again flashed it with Stock Oreo(tissot_images_8.1.10_20180110.0000.00_8.0_8ea503201b)
but this time both sim was not showing network(sim card not detecting )
currently on Pie Stock Boot loader Locked no system update is available
after updating when setup start it show English US And estados unidos in language selection earlier the setup auto detect the country (English India)
while using TWRP i cleared vendor image too is there any problem (i read on XDA that if i flash stock or RR it will replace any Vendor image)
or the problem is the ROM i flashed was not for india ?

Rnayar18 said:
!Need Help!
i flashed Custom ROM RR Havoc OS etc faced some problem with that rom's so switched back to Stock ROM Android Pie but MY Volte Was not working on Both sim Jio And Airtel 4G is Working Fine(Earlier VoLTE was Working)
so i first flashed Stock pie Downloaded from MI website (tissot_images_V10.0.4.0.PDHMIXM_20190104.0000.00_9.0_2cee840c96)
Volte was not working so i again flashed it with Stock Oreo(tissot_images_8.1.10_20180110.0000.00_8.0_8ea503201b)
but this time both sim was not showing network(sim card not detecting )
currently on Pie Stock Boot loader Locked no system update is available
after updating when setup start it show English US And estados unidos in language selection earlier the setup auto detect the country (English India)
while using TWRP i cleared vendor image too is there any problem (i read on XDA that if i flash stock or RR it will replace any Vendor image)
or the problem is the ROM i flashed was not for india ?
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you can install the February update then reboot your cellphone if it works, congratulations on your efforts. if that case still continues you can reset your network card from setting the signal reset, bluetooth and wifi, and then reboot ... and enjoy your repair effort If it's not sweet enough, you can reset your phone's factory and reboot. enjoy it

Making volte work on Andorid Q Roms.

As I have seen many people are facing issues regarding volte not working on android q roms. This can be solved by following the below procedure.
1) Flash stock Zui 3.5 through qfil
https://drive.google.com/file/d/1xWGFtcMZhMeOAsmASj4fwJzzbHOZZwdj/view
2) Boot into the rom and make sure that volte is working
3) Now unlock the bootloader and without booting back into system go to fastboot and flash recovery.
4) Flash the latest twrp and then wipe data/system/dalvic/cache.
5) Now flash any Andorid Q rom and reboot to system
6) You will be able to use volte now.
Note:- Make sure your sim is inserted into slot 1 or else volte might not work.
For any queries PM