Hi
Bricked my old 16gb HTC One M8 - sending to HTC for repair tomorrow.
Ordered a replacement 32gb HTC One M8 from Hong Kong. It was billed as 'new' but on arrival it appears to be S-OFF but locked. Full bootloader details below:
*** LOCKED ***
M8_UL_CA PVT SHIP S-OFF
CID-11111111
HBOOT-3.16.0.0000
RADIO-1.15.2133156.UA13G
OpenDSP-v38.2.2-00542-M8974.0311
OS-1.54.401.5
eMMC-boot 2048MB
Mar 22 2014,00:53:32.16037
Whenever I try to update OTA, it tells me my phone is not stock and the update doesn't install. I just want to get the phone back to stock with the latest OTA firmware, nothing more. What would my best course of action be here?
I'm no expert but I did purchase a used M8 last week with similar status, which was able to return to (almost) stock.
First, I think your super cid (11111111) is stopping you from any OTA update. Change that to reflect your carrier.
If you are still not able to check for OTA update after that, you need to unlock the bootloader, install TWRP or CWM boot loader, and flash a backup of stock Rom from your carrier.
billyboy77 said:
Hi
Bricked my old 16gb HTC One M8 - sending to HTC for repair tomorrow.
Ordered a replacement 32gb HTC One M8 from Hong Kong. It was billed as 'new' but on arrival it appears to be S-OFF but locked. Full bootloader details below:
*** LOCKED ***
M8_UL_CA PVT SHIP S-OFF
CID-11111111
HBOOT-3.16.0.0000
RADIO-1.15.2133156.UA13G
OpenDSP-v38.2.2-00542-M8974.0311
OS-1.54.401.5
eMMC-boot 2048MB
Mar 22 2014,00:53:32.16037
Whenever I try to update OTA, it tells me my phone is not stock and the update doesn't install. I just want to get the phone back to stock with the latest OTA firmware, nothing more. What would my best course of action be here?
Click to expand...
Click to collapse
M8_UL_CA. You are on AT&T, correct?
You can download the latest AT&T RUU here.
Download it onto your PC. Hook up your phone and open command prompt. Direct it to your ADB folder, then enter these commands.
adb reboot bootloader
fastboot reboot-bootloader
fastboot rebootRUU waiting for it to boot after each command.
Then run the RUU download by double clicking on the download, and follow the prompts given.
You will have to run it twice. The first time will not install the whole package, the second time finishes the process. This is normal.
xunholyx said:
M8_UL_CA. You are on AT&T, correct?
Click to expand...
Click to collapse
I'm not with AT&T. I bought the phone carrier unlocked - I use a Three mobile SIM. If the phone has been made S-OFF and carrier unlocked then I'd like to return it to a stock unlocked model if possible...
ikeny said:
I'm no expert but I did purchase a used M8 last week with similar status, which was able to return to (almost) stock.
First, I think your super cid (11111111) is stopping you from any OTA update. Change that to reflect your carrier.
If you are still not able to check for OTA update after that, you need to unlock the bootloader, install TWRP or CWM boot loader, and flash a backup of stock Rom from your carrier.
Click to expand...
Click to collapse
Hi - I don't have a carrier - I bought the phone on its own, supposedly carrier unlocked, using an existing Three mobile SIM that I have.
Does anyone have any suggestions for a suitable SuperCID I could try?
Super cid (11111111) means you can flash any rom manually, but no OTA update.
If you want OTA updates, you either pick a carrier and use its cid, or use the GPE (Google play edition) cid. GPE means no HTC added stuffs, like sense 6.
Either way, Google for the cid numbers.
ikeny said:
Super cid (11111111) means you can flash any rom manually, but no OTA update.
If you want OTA updates, you either pick a carrier and use its cid, or use the GPE (Google play edition) cid. GPE means no HTC added stuffs, like sense 6.
Either way, Google for the cid numbers.
Click to expand...
Click to collapse
My last phone was a stock HTC which I converted to GPE. I got fed up with the phone and tried to revert to stock, but messed up. While HTC fix that one I'm trying to update this replacement... getting a bit fed up with non stock HTC phones now to say the least!
Will changing my CID to something like HTC__001 and rebooting risk bricking the phone?
My HTC M8 also has S-off, and I have no problem changing the cid to whatever I want with the toolkit on xda.
Running OTA updates, on the other hand, is more risky to me since I didn't know the history of my device. I chose to flash a nandroid backup via TWRP. (No RUU published from my carrier). Then I re-rooted the stock rom, retuned back to stock recovery, removed the "modified/tampered" status, and locked the boot loader. I left the S-off status, which is the only non-stock.
billyboy77 said:
My last phone was a stock HTC which I converted to GPE. I got fed up with the phone and tried to revert to stock, but messed up. While HTC fix that one I'm trying to update this replacement... getting a bit fed up with non stock HTC phones now to say the least!
Will changing my CID to something like HTC__001 and rebooting risk bricking the phone?
Click to expand...
Click to collapse
The guy that sold me the phone suggested I flash this RUU to the phone. It appears to be a Brighstar US RUU... which just confuses me even more.
"i have find a way to fix your problem, its very simple, but requires your attention to the following details
follow what this link tells you
http://www.htc.com/us/support/htc-one-m8/news/"
What did you ask from the seller? Was it just something "stock and unlocked"? The US rom quote was definitely stock. (Sim) unlocked or not is independent of the rom. Your phone could be locked/unlocked regardless of the rom you use.
All unmodified version from HTC are stock, including GPE. You need to first decide which carrier you want your phone to be "stock" for.
billyboy77 said:
The guy that sold me the phone suggested I flash this RUU to the phone. It appears to be a Brighstar US RUU... which just confuses me even more.
"i have find a way to fix your problem, its very simple, but requires your attention to the following details
follow what this link tells you
http://www.htc.com/us/support/htc-one-m8/news/"
Click to expand...
Click to collapse
I've just spoken to someone in HTC USA Customer services - the phone is formerly an AT&T contract phone. She told me that I'm better off returning the phone to the seller if I want regular OTA updates.
So either send it back and be without phone for a week or so, or try and return it to factory stock myself. Tricky one.
ikeny said:
What did you ask from the seller? Was it just something "stock and unlocked"? The US rom quote was definitely stock. (Sim) unlocked or not is independent of the rom. Your phone could be locked/unlocked regardless of the rom you use.
All unmodified version from HTC are stock, including GPE. You need to first decide which carrier you want your phone to be "stock" for.
Click to expand...
Click to collapse
OK so in theory, I could change the CID to Three UK, and find a Three UK RUU and convert the phone into a stock unlocked three UK one that works with my sim...?
billyboy77 said:
OK so in theory, I could change the CID to Three UK, and find a Three UK RUU and convert the phone into a stock unlocked three UK one that works with my sim...?
Click to expand...
Click to collapse
It looks like my best/safest option is installing the Developer edition RUU - but I am on a mac. Does anyone have the correct Zip file of this?
http://www.htc.com/us/support/htc-one-m8/news/
billyboy77 said:
It looks like my best/safest option is installing the Developer edition RUU - but I am on a mac. Does anyone have the correct Zip file of this?
http://www.htc.com/us/support/htc-one-m8/news/
Click to expand...
Click to collapse
I don't think the ROM update exe will run in Mac. You'll need to find a Windows pc for this, or try virtual machine running Windows on your mac.
billyboy77 said:
It looks like my best/safest option is installing the Developer edition RUU - but I am on a mac. Does anyone have the correct Zip file of this?
http://www.htc.com/us/support/htc-one-m8/news/
Click to expand...
Click to collapse
all the files you need to convert to DE are here >> https://www.androidfilehost.com/?a=show&w=files&flid=21320
This guide may be easier to convert to the DE as it used RUU. No custom recovery and s-off required.
http://forum.xda-developers.com/htc-one-m8/development/ruu-m8-developer-edition-sense-1-54-t2884777
billyboy77 said:
Hi
Bricked my old 16gb HTC One M8 - sending to HTC for repair tomorrow.
Ordered a replacement 32gb HTC One M8 from Hong Kong. It was billed as 'new' but on arrival it appears to be S-OFF but locked. Full bootloader details below:
*** LOCKED ***
M8_UL_CA PVT SHIP S-OFF
CID-11111111
HBOOT-3.16.0.0000
RADIO-1.15.2133156.UA13G
OpenDSP-v38.2.2-00542-M8974.0311
OS-1.54.401.5
eMMC-boot 2048MB
Mar 22 2014,00:53:32.16037
Whenever I try to update OTA, it tells me my phone is not stock and the update doesn't install. I just want to get the phone back to stock with the latest OTA firmware, nothing more. What would my best course of action be here?
Click to expand...
Click to collapse
If you ordered it from Mainland region then most sellers do S Off there even if the phone is new but if you wanted S On you could have talked to the seller. It's trend over there before getting a new android phone almost 90% sellers sells S OFF and Rooted new devices in almost all major Smartphone brands.
Edit: Yes, M8_UL_CA is definitely (AT&T) What country do you belong to? If you're based in the US then just run official HTC AT&T RUU and you will be able to get OTA updates in the near future.
maheshpatel said:
If you ordered it from Mainland region then most sellers do S Off there even if the phone is new but if you wanted S On you could have talked to the seller. It's trend over there before getting a new android phone almost 90% sellers sells S OFF and Rooted new devices in almost all major Smartphone brands.
Edit: Yes, M8_UL_CA is definitely (AT&T) What country do you belong to? If you're based in the US then just run official HTC AT&T RUU and you will be able to get OTA updates in the near future.
Click to expand...
Click to collapse
Actually, it is AT&T, T-Mob, plus Telus and Rogers (Canada, I'm on Telus).
I see he is unbranded(?) now. The first answer was assuming.
@billyboy77 Your radio version is WWE. Sorry I didn't notice that before.
Download the International WWE RUU here.
You will be able to flash this to get to stock since you are S Off and superCID. It will bring you up to the latest firmware. No need for OTAs. Back up anything that is important to you before running the RUU, because it will wipe your device.
hm... Seems like you guys are really trying your hardest to make this more difficult than it needs to be. Having S-OFF he can practically make his device any device he wants it to be, T-Mobile, AT&T, Unlocked, Developer Edition, surely any GSM based carrier/unlocked version.
What's the problem? Unlock Bootloader, Get a custom recovery, Get Root, Change your MID to the one you want, Change your CID to the one you want, Restore a backup for the one you chose, run OTA's...
"OMG I'm S-OFF and bought unlocked but I can't get OTA's because my phone WAS an AT&T and I'm not on AT&T I'm on Three"
:silly:
BerndM14 said:
hm... Seems like you guys are really trying your hardest to make this more difficult than it needs to be. Having S-OFF he can practically make his device any device he wants it to be, T-Mobile, AT&T, Unlocked, Developer Edition, surely any GSM based carrier/unlocked version.
What's the problem? Unlock Bootloader, Get a custom recovery, Get Root, Change your MID to the one you want, Change your CID to the one you want, Restore a backup for the one you chose, run OTA's...
"OMG I'm S-OFF and bought unlocked but I can't get OTA's because my phone WAS an AT&T and I'm not on AT&T I'm on Three"
:silly:
Click to expand...
Click to collapse
After what happened with my last phone, I'd rather not muck about with unlocking, rooting or any of that balls. Just a stock OS with regular updates will do me just fine (until the new HTC comes out anyway)
Hi there,
I had received a modified M8 a while back and followed the instructions on this forum to bring it back to stock (here).
This was required to run my corporate emails for work. Everything seems fine, i get my emails and all. (If it wasn't, the policy wouldn't let me add exchange)
Now that Lollipop got released though my phone does not find the update even when i force search it.
I am looking for the firmware.zip lollipop for TELUS. Can anyone direct me to a link where i can download it? The repositories don't seem to have it
If this helps, fastboot is;
Software status Official
Relocked
m8_UL xf s-on
hboot 3.19.0.0000
radio 1.22.21331147a1.15g
opendsp - v46.2.2-00564-m8974_fo.0811
os-3.34.661.4
In phone, menu says:
Android: 4.4.4
Sense: 6.0
Software number: 3.34.661.4
SDK: 6.25
flixxx said:
Hi there,
I had received a modified M8 a while back and followed the instructions on this forum to bring it back to stock (here).
This was required to run my corporate emails for work. Everything seems fine, i get my emails and all. (If it wasn't, the policy wouldn't let me add exchange)
Now that Lollipop got released though my phone does not find the update even when i force search it.
I am looking for the firmware.zip lollipop for TELUS. Can anyone direct me to a link where i can download it? The repositories don't seem to have it
If this helps, fastboot is;
Software status Official
Relocked
m8_UL xf s-on
hboot 3.19.0.0000
radio 1.22.21331147a1.15g
opendsp - v46.2.2-00564-m8974_fo.0811
os-3.34.661.4
In phone, menu says:
Android: 4.4.4
Sense: 6.0
Software number: 3.34.661.4
SDK: 6.25
Click to expand...
Click to collapse
No they don't, and I wouldn't be surprised if they never did.
I am also on Telus, and ever since the first firmware update ten months ago or so, I've been using WWE firmware. (It's the first to update after GPCE and DevED)
Gain S-Off ($25, but always on the latest with no going back to stock hassle), go superCID, and flash 4.16.401.10
My friends on telus all received the lollipop update.
I can't add a custom firmware because I won't be able to have my work email on it.
I'm simply looking for the file to download and manually update it.
Hello all I am new and so apologies if this is in the wrong place or is just a stupid question.
I have just got myself a new HTC OneM8 and was concerned that it does not see any updates as it is still on 4.4.2 i would have thought that it would at least see sence 7 or even lollipop by now if not Marshmellow yet
I went into the boot screen (fastboot off, power + vol down) and this is what i see: It is sim free and I am on Virgin UK
*** Software status: Official ***
*** LOCKED ***
M8_WHL PVT SHIP S-OFF
CID-11111111
HBOOT-3.19.0.0000
RADIO-1.09.20.0209
OpenDSP-v38.2.2-00542-M8974.0311
OS-1.54.651.8
eMMC-boot 2048MB
Aug 4 2015,19:05:23.3
My question to you guys is can this be updated? should it see the updates?
or is it a bad phone (i can send it back if needed for a refund)
Thx in advance for any help on this matter cheers all
If you can send it back for a refund or for another phone, do it.
It is not a bad phone but not suitable for you at where you are located now.
That's a Sprint US device and the official update will come only when you're on Sprint US network, not on any other SIM free network.
And yes .. you post this in wrong section, I'll ask moderator to move this to Q&A section
ckpv5 said:
If you can send it back for a refund or for another phone, do it.
Click to expand...
Click to collapse
I agree with the above that this is the worst version of the M8 to have (along with the Verizon version) if you aren't located in the US and on that actual network (Sprint or Verizon) for the following reasons:
1) Excessive carrier branding and bloatware common to most US branded devices
2) This version can't be fully converted to Euro version or any other version (to change radio baseband, OTA updates, etc.)
3) Can't flash many ROMs, unless they specifically support the Sprint version; or you install the proper kernel
Although points 2 and 3 above are mostly only relevant if you intend to mod the phone.
If the phone supports all the bands your carrier uses (3G, LTE) and you don't mind the Sprint branding,
you can still update it by RUU, with download link and instruction on the bottom of the following support page (be aware that RUU will wipe the whole phone):
http://www.htc.com/us/support/htc-one-m8-sprint/news/
Thank you. I was sure it had something to do with Sprint as under the current user in settings/about it is listed as [email protected]
thanks again for the speedy reply much appreciated I will send it back and get a UK version
Cheers
Funny I did try the update in that link and it failed
knocker221 said:
Funny I did try the update in that link and it failed
Click to expand...
Click to collapse
If it was Error 155, you need to flash the firmware.zip, then RUU (quirk with MM RUU).
But as you are returning the phone, I'd just not mess with it. Above is just an FYI, as it is confusing why the RUU that matches your version would fail.
I'm a very new android user, so please forgive my ignorance.
I'm using a sim unlocked AT&T M8 outside USA with a different carrier. Right now, the bootloader is Locked, CID is 11111111 and S-OFF. I've downloaded the official marshmallow RUU for the unlocked version of m8 from htc website.
I follow the install instructions until the update actually starts. Then it stops after about 10-20 seconds and shows Error 155: unknown error and enters into the recovery steps (in the RUU).
Can someone please help me out with this? I will never receive the OTA's since I'm not using an AT&T sim. So RUU is the only other option left. Thanks a lot in advance.
What's the Marshmallow RUU no. that you downloaded ? I see only 4.28.502.8
To run a Marshmallow RUU, you need to install its matching firmware first. If not you'll get that error 155
ckpv5 said:
What's the Marshmallow RUU no. that you downloaded ? I see only 4.28.502.8
To run a Marshmallow RUU, you need to install its matching firmware first. If not you'll get that error 155
Click to expand...
Click to collapse
Thanks for the reply. The RUU i downloaded is RUU_M8_UL_M60_SENSE70_MR_BrightstarUS_WWE_6.12.1540.4_2.exe.
My current software information is:
Android - 5.0.2
software number - 4.28.502.2
HTC SDK API Level - 6.55
Baseband version - [email protected]_40.45.C33065.00_F
Build number - 4.28.502.2 CL511189 release-keys
In the bootloader, it shows "software status: Official"
Do you think the RUU i downloaded is incompatible with my phone?
Big-Bonsai said:
Thanks for the reply. The RUU i downloaded is RUU_M8_UL_M60_SENSE70_MR_BrightstarUS_WWE_6.12.1540.4_2.exe.
My current software information is:
Android - 5.0.2
software number - 4.28.502.2
HTC SDK API Level - 6.55
Baseband version - [email protected]_40.45.C33065.00_F
Build number - 4.28.502.2 CL511189 release-keys
In the bootloader, it shows "software status: Official"
Do you think the RUU i downloaded is incompatible with my phone?
Click to expand...
Click to collapse
It is the wrong RUU for your device. 6.12.1540.4 is for the Dev Ed model. You have regular AT&T. I don't think AT&T has released the Marshmallow RUU yet, but when they do, the RUU will be 6.xx.502.x The 502 part is what you need to look for.
xunholyx said:
It is the wrong RUU for your device. 6.12.1540.4 is for the Dev Ed model. You have regular AT&T. I don't think AT&T has released the Marshmallow RUU yet, but when they do, the RUU will be 6.xx.502.x The 502 part is what you need to look for.
Click to expand...
Click to collapse
Okay, that made it clear. Thank you very much. Cheers!
need firmware!!
ckpv5 said:
What's the Marshmallow RUU no. that you downloaded ? I see only 4.28.502.8
To run a Marshmallow RUU, you need to install its matching firmware first. If not you'll get that error 155
Click to expand...
Click to collapse
i have aunlocked (outside US) harman kardon edition (sprint) hTC one m8 (831C) and have the same issue though i have the correct RUU. Can you help me with correct firmware?
its currently running on kitkat 4.4.2
thanks in advance!
akshaypallath99 said:
i have aunlocked (outside US) harman kardon edition (sprint) hTC one m8 (831C) and have the same issue though i have the correct RUU. Can you help me with correct firmware?
its currently running on kitkat 4.4.2
thanks in advance!
Click to expand...
Click to collapse
for sprint device take a look to this thread ( read it carefully )
https://forum.xda-developers.com/showthread.php?t=2729173
Thanks for coming to this thread,i need help to upgrade my device to newest and possible android
i not get any OTA upgrade ( i recently buy this phone from online seller at my country Indonesia ) this phone work perfectly with 4G lte and another function ,but i want newest android for my device
this is my device information :
android version=4.4.4
sense version=-6.0
software version=3.31.512.2
htc sdk api level 6.25
pri version-2.87_002
prl version-00000
kernal version 3.4.0-g3e2305b [email protected] #1 SMP PREEMPT
Baseband version-1.09.20.0926
build number-3.31.512.2 CL395691 release-keys
BOOTLOADER ;
***UNLOCKED***
M8_WLV PVT SHIP S-OFF
CID-11111111
HBOOT-3.19.0.0000
RADIO-1.09.20.0926
OpenDSP-v46.2.-00564-M8974_FO.0811
OS-3.28.605.4
eMMC-boot 2048MB
Sep 30 2014,01:16:07.90023198
Check that any custom recovery is installed?
kiregnwn said:
....but i want newest android for my device
this is my device information :
android version=4.4.4
sense version=-6.0
software version=3.31.512.2
htc sdk api level 6.25
pri version-2.87_002
prl version-00000
kernal version 3.4.0-g3e2305b [email protected] #1 SMP PREEMPT
Baseband version-1.09.20.0926
build number-3.31.512.2 CL395691 release-keys
BOOTLOADER ;
***UNLOCKED***
M8_WLV PVT SHIP S-OFF
CID-11111111
HBOOT-3.19.0.0000
RADIO-1.09.20.0926
OpenDSP-v46.2.-00564-M8974_FO.0811
OS-3.28.605.4
eMMC-boot 2048MB
Sep 30 2014,01:16:07.90023198
Click to expand...
Click to collapse
Lollipop is the latest Android version for your device variant which is a LRA.
You can get the 4.21.512.4 RUU here : https://forum.xda-developers.com/showpost.php?p=66044439&postcount=37
then OTA to 4.21.512.5 but most probably you need to change the CID from SuperCID 11111111 back to stock LRA__001 for OTA to install successfully as explained here : https://forum.xda-developers.com/showpost.php?p=67516629&postcount=26
Then you can install any Marshmallow GSM ROM with Verizon support.
Note : Never ever install any Verizon stock firmware or any GSM firmware to your device, it'll brick the radio and you'll lose network & data.
Think about it before you do it...
ckpv5 said:
Lollipop is the latest Android version for your device variant which is a LRA.
You can get the 4.21.512.4 RUU here : https://forum.xda-developers.com/showpost.php?p=66044439&postcount=37
then OTA to 4.21.512.5 but most probably you need to change the CID from SuperCID 11111111 back to stock LRA__001 for OTA to install successfully as explained here : https://forum.xda-developers.com/showpost.php?p=67516629&postcount=26
Then you can install any Marshmallow GSM ROM with Verizon support.
Note : Never ever install any Verizon stock firmware or any GSM firmware to your device, it'll brick the radio and you'll lose network & data.
Click to expand...
Click to collapse
It's awesome you actually got great advice and refrences to how to do what you need to do. I'd like to add this though: Consider whether getting Lollipop is worth re-locking and doing the things you need to do, including putting your device from s-off to s-on is worth it. And yes, you can run a RUU executable and extract the rom.zip from your computer's temporary files, but unless you have some mad coding and manual programming experience, with the version of HBOOT you have listed if you want to be s-off again you may be out of luck. or find yourself in a bootloop or your computer unable to find your device, or even unable to access stock recovery even with the correct button sequences. At best, you may find yourself unable to access mms apn settings (not even sure if you need or care about that), and if you can access them (apn and mms settings), unable to get the settings to stick (or actually apply themselves so your phone even uses them at all), or only have internet access but no mms even with the exact settings for mms you need put into a third-party texting app such as textra. etc.
if you are already or end up s-on and updated to the "latest and greatest" for your M8, maybe everything will work out perfectly for you . But, just something to thing about before doing all of those things. If you are lucky enough to get a bonafide XDA member's attention and help, as you have already, you are still by default expected to think of these things and do your own research. What you probably won't find out along the way is that when you run into some strange problem, there's no one knowledgeable to help you decipher it. There's tons of unanswered posts on this forum alone that have been viewed many times, that go unanswered.
kissyhot said:
I'd like to add this though: Consider whether getting Lollipop is worth re-locking and doing the things you need to do, including putting your device from s-off to s-on is worth it.
Click to expand...
Click to collapse
That's a wrong advise and wrong understanding.
Once a device is S-Off, there is NO NEED to relocking bootloader and there is NO NEED to change S-Off to S-On.
Only S-On device needs relocking bootloader to install signed firmware and signed RUU. S-On device can't install unsigned firmware or RUU.
S-Off device can install any unsigned or signed firmware and RUU (no relocking is needed and not advisable)
ckpv5 said:
That's a wrong advise and wrong understanding.
Once a device is S-Off, there is NO NEED to relocking bootloader and there is NO NEED to change S-Off to S-On.
Only S-On device needs relocking bootloader to install signed firmware and signed RUU. S-On device can't install unsigned firmware or RUU.
S-Off device can install any unsigned or signed firmware and RUU (no relocking is needed and not advisable)
Click to expand...
Click to collapse
thanks,so my device will still ***UNLOCKED*** after i install RUU right?
btw we dont have verizon provider on my country ,thats mean i cant do OTA update ?
so i guess RUU if my only option to update my device,?it is possible for my device to use marsmallow or nougat?
kiregnwn said:
thanks,so my device will still ***UNLOCKED*** after i install RUU right?
btw we dont have verizon provider on my country ,thats mean i cant do OTA update ?
so i guess RUU if my only option to update my device,?it is possible for my device to use marsmallow or nougat?
Click to expand...
Click to collapse
Leave it UNLOCKED so it will still be UNLOCKED after RUU is installed.
Whatever you do now or later ... no need to relock it, leave it UNLOCKED.
You can do OTA as this is not a Verizon device but LRA. Now you can't OTA because you have a Verizon ROM running. RUU 4.21.512.4 is stock LRA, you'll get OTA notification once you install it.
The only thing is you need to change SuperCID 11111111 to LRA__001 to proceed OTA (as experience by other user in the above link I gave you).
Frankly speaking I don't see any good reason to have SuperCID on this variant.
Once you updated to Lollipop you can use Marshmallow ROM which support Verizon (there are a few of them). Nougat .. not so sure but you can always try later after you updated to lollipop but definitely won't work on your current firmware which is a KitKat.