yashsingh1/xdaforums huggingface dataset:
[OnePlus 8T Guides, News, & Discussion] Smallsmx3:
Yes find the thread on here that has the repo of all the 8t builds. Download the EU 11.0.7.10 build. Update via local upgrade... No need to wipe or anything.....
[OnePlus 8T Guides, News, & Discussion] ysfk7:
So you can upgrade/downgrade to EU to Global or vise versa just with local upgrade?
[OnePlus 8T Guides, News, & Discussion] Smallsmx3:
You can only upgrade. So if you wanted to go back to global you would have to wait until the next update or you have to msm back... Make sure your using full builds not incremental.
[OnePlus 8T Guides, News, & Discussion] Smallsmx3:
Your best bet is to upgrade to EU 11.0.6.9. Try it out for a couple days if it sucks and you want to go back then flash 11.0.7.9 global otherwise if the EU is where you want to stay go to 11.0.7.10
[OnePlus 8T Guides, News, & Discussion] ysfk7:
Since i already locked the bootloader after i converted to global, i assume i have to unlock the bootloader to go to EU? I updated to 11.0.7.9.KB05AA incremental after did the full 11.0.6.8.KB05AA
[OnePlus 8T Guides, News, & Discussion] Smallsmx3:
Nope. Your good to go.
[OnePlus 8T Guides, News, & Discussion] Smallsmx3:
Did you convert to the EU build?
[OnePlus 8T Guides, News, & Discussion] ysfk7:
Not yet. Still on global 11.0.7.9.KB05AA
[OnePlus 8T Guides, News, & Discussion] Smallsmx3:
Are you still having issues?
[OnePlus 8T Guides, News, & Discussion] ysfk7:
Not sure yet. I just converted to global less than 24hrs. So far it looks good.
[OnePlus 8T Guides, News, & Discussion] Coderedpl:
I came to the forums looking for similar issues and found yours, weirdly though, I'm actually on Tmobile and came across this problem. I was actually trying to see if global or international had this issue. 😭
[OnePlus 8T Guides, News, & Discussion] Smallsmx3:
I have network issues on the global and none on the EU.
[OnePlus 8T Guides, News, & Discussion] Coderedpl:
I might just convert again and go EU. 😩
[OnePlus 8T Guides, News, & Discussion] Smallsmx3:
I would. I've been running EU over a week and battery has been better, not one network issue and the tmobile Rom doesn't have all the fixes
[OnePlus 8T Guides, News, & Discussion] Kiwi616:
MSM Tool worked like a charm to the point where it was too easy. I am back with the T-Mobile ROM and don't notice too much different. Processor speed about the same, just missing dual SIM, start-up screens and some BS installed apps that can be removed. Hopefully T-Mobile keeps up with the updates and there should be no desire for me to go Global again.

Thank you!
[OnePlus 8T Guides, News, & Discussion] risensunx:
What version of EU are you on? I went from Global 11.0.6.8 to EU 11.0.6.9 and I still had some issues where I wasn't receiving text messages and unable to send out text messages until I toggled the Airplane Mode on/off. I also wasn't able to call out until toggled the Airplane Mode.

If you are on the EU 11.0.7.10 build, do you have problems with your alarm or camera? A few people on the Updates Thread say they are having issues with it.

https://xdaforums.com/t/updates-thread.4188149/page-3#post-84475699
[OnePlus 8T Guides, News, & Discussion] ardax:
Whose dialer and messages app does the EU ROM have? Google's or OnePlus's?
[OnePlus 8T Guides, News, & Discussion] Smallsmx3:
Google, only t-mobiles 8t has the one plus dialer
[OnePlus 8T Guides, News, & Discussion] ysfk7:
It would be nice to get the google phone vvm transcription and call screening works on oneplus without rooting. The only reason for me to root again is vvm transcription and call screening. Maybe in the near future i'll root my phone again.
[OnePlus 8T Guides, News, & Discussion] ardax:
Wait, what? That's a thing? Man, I've been out of the game for too long. I'm already rooted, I'll have to see what else I need for that.
[OnePlus 8T Guides, News, & Discussion] ysfk7:
https://xdaforums.com/t/guide-magis...all-screening-on-unsupported-devices.4150585/
[OnePlus 8T Guides, News, & Discussion] craznazn:
You can always forward to Google Voice and use its vvm transcription if needed. Call screening would be nice though.
[OnePlus 8T Guides, News, & Discussion] GenesisDH:
Has anyone using a Sprint UICC done this process successfully, retaining data access (preferably without needing root to do so)?

I know on my previous OnePlus 7T model, if my Sprint UICC was inserted the APN it tries doesn't match the correct one needed. I had to do a specific set of steps to get the correct APN settings every time I rebooted, switched off Fnatic Mode, or toggled Airplane Mode.
[OnePlus 8T Guides, News, & Discussion] zefyx:
You are a true lockdown hero.
[OnePlus 8T Guides, News, & Discussion] mprabs:
I got EU ROM installed. But when I tried to lock the bootloader again, I got the message that your device is corrupt and will not boot. For more information visit "g.co/ABH". Am I supposed to leave the bootloader unlocked after moving to the EU ROM?
[OnePlus 8T Guides, News, & Discussion] ysfk7:
you need to do full OTA update (2GB), not the incremental, before relock the bootloader.
[OnePlus 8T Guides, News, & Discussion] Denkai:
I disabled Voice Over IP and it stopped doing that for me.
[OnePlus 8T Guides, News, & Discussion] craznazn:
After following the flash instructions, you need to flash the full OTA (via oxygen updater) and do not modify the system in any way. Then lock the BL
[OnePlus 8T Guides, News, & Discussion] mprabs:
Thanks. Will my phone by wiped once I lock the bootloader? Is there a risk to leaving the bootloader unlocked - other than the annoying warning message on reboot?
[OnePlus 8T Guides, News, & Discussion] craznazn:
AFAIK, locking the BL does not wipe, but I'm not 100% on that. It will give you a warning and you can decide what to do.

Regarding security risk: if someone gets a hold of your device, they can flash their own bootloader even if your device is screen locked and encrypted, and you wouldn't have a way of knowing. The rogue bootloader might capture screen taps, intercept encryption keys, or whatever else they want it to do since it'll be running before the OS. Keep in mind this applies even for downloaded boot.img from XDA, or Magisk modified boot. The trust can only be maintained cryptographically and all parts must be signed, which is why a modified system will not boot if you lock the BL (the chain of trust is broken).
[OnePlus 8T Guides, News, & Discussion] Qnorsten:
Both unlocking and locking of bootloader force a wipe. That is a security measure and by design.
[OnePlus 8T Guides, News, & Discussion] ysfk7:
So updated from global 11.0.7.9.KB05AA to eu 11.0.7.10.KB05BA, just because i want to compare.So far dont see any difference softwares wise. Also, I think with global even though it shows i have signal and connected to wifi, for the past few days i missed some calls and duo calls at work. we'll see if the EU version fix it
[OnePlus 8T Guides, News, & Discussion] Scott:
Does anyone know... If on the the T-Mobile Feb release what global or EU ROM would be appropriate to flash to convert? Or is everyone downgrading to the release ROM then upgrading? I guess it really doesnt matter but if I dont have to use MSM tool I would be much happier.

Also, does the "About" screen still show wonky details on the latest releases?
[OnePlus 8T Guides, News, & Discussion] awr128:
The About screen is still wonky and probably always will be.
[OnePlus 8T Guides, News, & Discussion] ysfk7:
This is the way
[OnePlus 8T Guides, News, & Discussion] urbex:
Just did this today on my Sprint phone. Everything except 5G appears to be working correctly - calls in/out, texts in/out, and data. Didn't touch any of the APN settings, or anything else beyond the typical "new phone" setup.

The 5G issue might be my own doing though, as I completely forgot to back up the modem before doing the conversion..not sure if that plays into it or not now.
[OnePlus 8T Guides, News, & Discussion] Smallsmx3:
You wouldn't be able to make calls if you didn't have a modem so not backing up didn't effect anything
[OnePlus 8T Guides, News, & Discussion] GenesisDH:
My guess is you would need to make sure VoLTE is enabled, since having that disabled will also turn 5G off (I actually do this through workarounds on stock to keep CDMA calling active).

Good to see, cause I am really wanting dual SIM options again.
[OnePlus 8T Guides, News, & Discussion] urbex:
That's what I was thinking, but wasn't sure if it was different due to all the carriers here in the USA using different forms of 5G, and whether that played into the modems too. It's not a huge deal to me, as I didn't buy this phone for 5G anyways. It just happened to be a nice bonus.

It would appear to be enabled, as I have an icon in the status bar that says VoLTE 2 (top line Vo, bottom line LTE, and a number 2 on the right side). Though I'm digging through the settings menu now, and don't see anywhere that I could enable/disable it either. Also wondering if that means that VoLTE is only enabled on the 2nd SIM, which is my Verizon line? (EDIT: yep..if I disable the Verizon SIM, the VoLTE icon disappears too...reading threads now on downgrading the logcat app to be able to switch LTE on/off when it's not showing the in the settings menu)

I just remembered too seeing something before I bought the phone that 5G doesn't work when running dual SIM...Or maybe it's some sort of conflict from having a Sprint and Verizon SIM together in the phone?

I wouldn't expect 5G to work on the Verizon side anyways, as the phone doesn't have the radio in it that support's Verizon's mm wave 5G. But it did work well on the Sprint SIM before tossing the global ROM on it. Regardless, it's not a huge loss to me, and I'd MUCH rather have dual SIM working on 4G than to run a single SIM just for 5G.

I may try the EU ROM tomorrow on it just to see what happens too.

EDIT 2 : I downgraded the logcat app, and forced the VoLTE and VoWifi switches on via the *#800# dialer menu. Now showing VoLTE 1 2 in the status bar icon, the Sprint SIM signal indicator dropped the 1x signal bar, and I did finally see 5G in the status bar on the Sprint line after using the OnePlus band selector tool to force only LTE bands, minus B2 (because the damn phone _always_ ends up locking on B2 here, and the speeds are so slow that apps depending on internet often won't even start, such as the Ookla Speedtest app).

I am noticing that signal strength is still pretty low though...will play with it more tomorrow when I get back to the city with much better 5G coverage.
[OnePlus 8T Guides, News, & Discussion] urbex:
Update...got into Phoenix this morning, saw full 5G signal, ran a speed test and got nearly 300 down, 60 up. Fastest I've ever seen this phone do by far, though signal levels are dropping pretty fast once I got back out to the suburbs again.

Still plenty usable, still shows its on 5G, but dropping to 25/5 levels. I'm cool with it, works for my needs, but others may have an issue with it.
[OnePlus 8T Guides, News, & Discussion] jwarrior319:
To get proper 5G support with sprint you need to get the tmo tnx sim. You'll be able to use 5G on B71/B66 rather than legacy sprint B41.
[OnePlus 8T Guides, News, & Discussion] urbex:
And watch my useable signal and data speeds drop to near zero everywhere outside of the city? No thanks, hard pass on that one.

I got 5G on B66 just fine on the Sprint SIM _before_ going to the Global ROM. Literally immediately before loading the ROM, as in minutes. It's definitely something software wise. I could lock out every band except 66, and still got 5G with much better speeds than any 4G.

Much the same as I was told that having CDMA Less on my Verizon account was an absolute MUST in order to get SMS working correctly - I could send SMS, but never received a single one while still on the Tmo ROM. Everyone said the same thing - it's an issue on Verizon's backend, and there was absolutely nothing I could do to the phone to fix it. My problem there is that my Verizon line is an employer paid corporate line, I don't have any manage rights on the account, and I'm _supposed_ to be using only the employer provided iPhone. Didn't exactly look forward to trying to explain to our phone support department why I needed a special SOC just on my line, lol.

Yet putting the Global ROM on the phone did fix it...so somehow, again, it appears to be a local software issue rather than a carrier side issue.
[OnePlus 8T Guides, News, & Discussion] GenesisDH:
My educated guess: This is likely due to core Phoenix having the combined n71 and n41 setup, whereas many other areas (including most rural areas) still have only n71. I see this in past experience going from an area with known T-Mobile n41 deployment to areas without n41 deployment here in the KC metro.

B4/B66 is currently just an LTE anchor for NSA 5G. EN-DC enables a 5G icon when the device sees a connected tower setup for 5G, even if 5G isn't being used for the data connection (That annoys me to be honest). n66 is not active on T-Mobile, since T-Mobile has avoided using DSS for the time being. You would still need to have n71 and/or n41, along with B66 and/or B2 in the area to get 5G data on Sprint UICCs (T-Mobile SIMs are capable of Standalone 5G so they just need n71 or n41 to have 5G data access).

I suspect that urbex's device is seeing a 5G capable tower, just not necessarily using the actual 5G interface due to not having all requirements for 5G access that you need (valid LTE anchor, valid 5G NR band, and VoLTE enabled). Cellmapper and Signal Check Pro should easily tell if the device is connected to 5G NR for data.

As for the Verizon end, QPST would tell you if the Verizon UICC is running on a CDMA-less policy. There are different policies for CDMA-less and CDMA-enabled devices, from past research using older Pixels and OnePlus devices. Dual SIM with two UICC/SIMs using CDMA-enabled policies make things complicated, since it appears only one of the two UICCs can access the CDMA radio.

Interesting observations, nevertheless. I appreciate the responses regarding the Sprint-specific details, since most people using the T-Mobile variant are actually on T-Mobile or doing TNX. I myself won't do TNX until T-Mobile gets the network integration nearly complete, since Sprint-legacy has more domestic roaming partners than T-Mobile.
[OnePlus 8T Guides, News, & Discussion] jwarrior319:
In my area sprint sims are essentially obsolete since using one leaves you barely even 3g access at this point. I had gone to tnx and we have actual standalone B66 5G here. Ive since moved to a mvno(straight talk tmo sim) and still get SA B66. Every areas rollout plan varies. For awhile we kept 5G B41 SA but it was removed and replaced with B66.
[OnePlus 8T Guides, News, & Discussion] urbex:
This is entirely possible. I haven't really started trying to dig into the reasons why, as I don't really care all that much...the 5G wasn't much of a selling point for me anyways. 4G is plenty fast enough for what I do on the phone, and for me, obsessing over 5G is like buying a Lamborghini only to use it to commute to work 10 miles away and never getting over 65mph - performance wise it means jack compared to the Civic in the driveway, for that same usage scenario, lol.

My biggest thing was getting a dual SIM phone that works with Sprint & Verizon, and isn't artificially locked down like my Pixel is. Which basically left me with one option - the 8T, at least until the Tmo and Sprint systems are fully merged, and one at least hopes that Sprint users will be able to get away from Sprint's whitelist system.

Interesting thought on the SIM access...if Sprint is essentially "locking Verizon out" of access to the CDMA radio, then it forces everything to go over LTE on the Verizon side. Though the way it was explained to me that was that some kind of setting/switch/whatever on Verizon's side forced all texts to go _TO_ the phone over CDMA regardless of how the text was sent _FROM_ the phone, due to poor database entries on the Oneplus phones.

Which seemed awfully odd to me, as someone who works with radio/RF virtually every day, though admittedly I'm not all that familiar with the intricacies of cell phone connections (my experience is more with 2 way radios, and the network backhauls). If having it in dual sim mode basically locks Verizon out of the CDMA radios, and makes the phone register on the cell network as a non CDMA capable radio, that would explain the behavior I'm seeing.

This is something that I think a LOT of people miss - that just because one system works/doesn't work in THEIR area doesn't mean that it holds true across the country. Where I live (outside the Phoenix, AZ metro area), Tmo & their MVNOs service is virtually non-usable, despite what their coverage maps may claim. Actual speeds are less than 2G, consistently. Further out you go, the worse it gets. Sprint works, and works well, here. If I was some kid that never left the metro areas, Tmo would be great for me. But as someone who lives and works in rural areas, and spends 99%+ of his time in those rural areas, having Tmo service is about as good as just not having a phone, period.
[OnePlus 8T Guides, News, & Discussion] GenesisDH:
It's a known Qualcomm modem issue, since they only provide one MEID on a device even if it has more than one IMEI. Even Apple, who uses Qualcomm modems for their eSIM and Dual SIM capable iPhones, acknowledges this on their support site: https://support.apple.com/en-us/HT209044

So basically once you start using the Sprint UICC, no other UICC or SIM can access CDMA.
[OnePlus 8T Guides, News, & Discussion] mslezak:
For anyone using the NA/Global ROM - I tried the Oxygen Updater to upgrade, it screws up the Settings app and the phone app. I just dealt with it a while then tried the payload dump method today and much to my surprise, no data loss! You may have to do the local update first to avoid data loss, I don't know, just happy all works again. I have the payload extracted here, with a Magisk patched boot.img along with it (magisk_patched_NA.img). Also has the flash_all.bat script. Yeah I have a dual sim card as well, and installed jOnePlus Tools so I can record phone calls in the USA. I'm rooted with a custom kernel based on Radioactive with some tweaks I made to it (max 800/920mhz GPU, lowered the min frequency to 295mhz, added min Adreno boost to the code). Oh BTW you have to install Magisk Hide Props Config and select the EU fingerprint if you want to keep Widevine L1 on the NA ROM, at least I had to. You just run props from a terminal emulator like Termux after typing su first. Then just go through the list of approved fingerprints and choose the Op8T EU official one. It's on Mega here's the link, around 3.2GB NA_Payload_Flasher_11.0.7.9.KB05AA.zip just unzip, go to fastbootd and flash_all.bat like the rest of the post says: https://mega.nz/file/f1YjxCpA#b8VjRRe91gKhgWDpAXGGJFc4APZ5P3l3cWOhybfsNPM
[OnePlus 8T Guides, News, & Discussion] GenesisDH:
NA is Global (unless you are referring to the T-Mobile-branded ROM), but it's good to see additional root options so thank you for the rest of your post.

What issues were you having with the phone app, if I may ask?
[OnePlus 8T Guides, News, & Discussion] mslezak:
Yep everything will be gone (data). I use a combo of Google Backup and Alpha Backup Pro ($6 or so on the Playstore) which saves all your settings for each app conveniently, unlike Google. Even if you're rooted. With an unlocked bootloader, yeah someone who knows what they are doing could in theory EDL flash back the stock software and make it their own phone. If you didn't report it stolen (you have the IMEI, right?). But then again, they can do that anyway with a locked bootloader. I find it incredibly annoying but I think Android/Google makes everyone put that message on there now. If you can EDL flash a phone then that defeats any protections of having a locked bootloader; it bypasses the primary bootloader in order to restore the phone to the factory original settings / software. So really your phone isn't less secure in my opinion with an unlocked bootloader. Just more convenient - you can block ads, you can bypass stupid system apps that monitor your data and phone usage and disable them, you can get past region locks, you can change to a better kernel than the stock one, you can even run a different OS completely. But if it annoys you, go for it.
[OnePlus 8T Guides, News, & Discussion] mslezak:
If you went to portrait mode it would crash, some other weird bugs - same on pro mode. The settings app said "Please choose a date" or something to that effect, and numerous system apps changed their names to "This user no longer has access to this feature" even though they still worked. Just annoyances. I was using Gcam as a workaround anyway. Now it looks the same as the original post; just missing phone info on the About Phone page. All else works as it should. And actually NA is Global didn't know that one:

IN: 11.0.7.9.KB05DA

EU: 11.0.7.10.KB05BA

NA: 11.0.7.9.KB05AA
[OnePlus 8T Guides, News, & Discussion] GenesisDH:
It's not. If you look at the OTA update zips post in this forum, the international/global is KB05AA.

You might be looking at the Indian one, which is the KB05DA, thinking that is the Global one. It is not, and it has things that the Global wouldn't have such as the Red Cable Club, unlocked call recording, and OnePlus cloud storage stuff.
[OnePlus 8T Guides, News, & Discussion] mslezak:
Ah I see, yeah I thought the EU one was Global, but appears you're right that the NA website version is KB05AA which is also the same on the Global OnePlus website. Then scratch what I said about Widevine L1 and use the EU fingerprint if you aren't getting L1 Widevine.
[OnePlus 8T Guides, News, & Discussion] badpanda:
Thread seems dead now. About section was never fixed and better more intuitive methods were never found... Yet oneplus 9 is coming out this Tuesday. Well it was a good run while it lasted. My advice don't even bother with this convertion. Stick with tmobile original version. And for the future buy directly from oneplus or via Amazon and use affirm to make payments. Much better experience. Good luck.
[OnePlus 8T Guides, News, & Discussion] urbex:
And just how do we get dual sim functionality from TMO original version, Mr. Unsolicited Advice? The unlocked versions from Amazon and OP direct also won't activate on Sprint either...which leaves many of us SOL.
[OnePlus 8T Guides, News, & Discussion] badpanda:
I understand. That's why sprint is dead.

Just move to Visible wireless owned by Verizon, if that's your problem.
[OnePlus 8T Guides, News, & Discussion] urbex:
Sure, let me get right on to moving moving myself right to the bottom of the prioritization list while jacking my cost up another 50%...sounds like excellent solution!! 🤦‍♂️

And that solves the dual SIM problem...how?
[OnePlus 8T Guides, News, & Discussion] Smallsmx3:
The Tmobile Rom isn't up to date with all the fixes. I'll pass on that one. After being on EU, Global, and Tmo Roms I have the least amount of issues on the EU Rom. Network connection is exactly the same for me and network speed is also the same on EU and Tmo.
[OnePlus 8T Guides, News, & Discussion] GenesisDH:
To respond to the "dead" comment to the guide, the manual method still works (just have to pull the full OTA yourself). There's also recent posts of updating the flash.bat method with the most recent Global update. It's very much a live discussion.
[OnePlus 8T Guides, News, & Discussion] craznazn:
I wouldn't say the thread is dead, just not much to update currently. EU has been working fine as a daily for 5+ months with dual SIM. I specifically said in the OP that you should manually flash an updated OS11 of your preferred region once you are booted, since that'll be the most stable. For that reason, the OP isn't updated with the newest OTA every time it's out. In fact, if you use the fastboot method to flash the latest global, you can't local change to EU since there will technically be a version downgrade (or vice versa? One of the versions is higher than the other)...

Regarding other flashing methods, I still look at methods to try, but nothing successful yet.

Can't justify this purchase, if you already have the 8T (I assume you do, since you are here...)