yashsingh1/xdaforums huggingface dataset:
[HTC U11  Questions & Answers] meadowscurse:
I'm stock unrooted. Don't use signal guru. Haven't been having any major issues with Verizon. Just the normal band 13 only no CA.No wifi calling or vvm.
[HTC U11  Questions & Answers] LibertyMonger:
Yeah I think the complete loss of signal issue only happens when we start missing with system, like flashing things or installing things to system that require a reboot. That has been my experience. The only time it happened to me away from home is when I tried to update adaway and rebooted. You have to be rooted for that. I had 100% reliability with only having band 13 as long as I was booted and not messing with things we aren't supposed to. It may have not been the fastest but it never interfered with anything I did, videos, games and live streaming all worked perfectly. My Speedtest scores with band 13 averaged between 8-30 mbps with occasional 40's but when comparing them with my Verizon HTC 10 in the same areas they matched, probably because most areas are band 13. I did a test once, a 45 minute drive as a passenger, I tested my U11 over and over again all the way there, taking screenshots and tested my HTC 10 the same all the way back and all of the scores were consistent. This experience was enough for me to want to try it for another 30 day's, so I returned my 4gb model to upgrade to the 6gb model, hoping there would be a fix before my 2nd 30 day trial ended. We don't have an official fix yet but if rooted we have a fix that opens up bands 2 &4 with no issues and we have an easy way to restore signal if it is ever lost again by backing up and restoring modemst2 partition. Losing complete signal is very rare and almost non-existent if we remove the SIM while messing with system. I have 100% success removing the SIM when flashing or updating. What we don't know for sure is if this lost signal issue is a problem for people who never root their phone or flash custom recovery. If it does happen it seems it would be more public. Although I am quite sure not many regular Verizon users have bought this phone. Hopefully the next update fixes it if non-rooted phones have this issue. The biggest complaint I have been seeing lately is just getting connected to the Verizon Network, still do not know why that is such a problem and hope for the people who wanted this phone have sorted that issue out. I know my issues are resolved so I will be keeping mine.
[HTC U11  Questions & Answers] harrisonb:
I've had complete signal loss with my phone and is not rooted
[HTC U11  Questions & Answers] Anon2016:
As I have stated before so have I. I'm not sure why "it's only rooted mods that seem to see this" keeps being repeated.

Zero issues since moving to TM. This is 100% Verizon being Verizon.
[HTC U11  Questions & Answers] LibertyMonger:
I can only go by my experience. I been waiting for more people to step up and tell their experience. We can't ever know if no one ever tells. Just trying to figure it all out.

---------- Post added at 04:47 PM ---------- Previous post was at 04:42 PM ----------

So how many times and was it after a reboot? We just don't get many details from people who have never rooted. They normally wouldn't be here on XDA if they don't root.
[HTC U11  Questions & Answers] harrisonb:
It just went out in 4g coverage, it took 3 reboots to get in on the network again
[HTC U11  Questions & Answers] christiebunny:
If flashing the modemst2 partition fixes things, maybe someone could post a 'clean' copy that has signal, so those of us with issues can get signal back too?
[HTC U11  Questions & Answers] LibertyMonger:
While it was booted? If so then your issue was probably due to only having band 13. It is probably not the same type of signal loss issue I have experienced. If you are stuck with the phone then rooting it and opening the app Network Signal Guru will get you bands 2 and 4. I am not sure the next update is gonna do that for us. If you do not want to root it I would return it for a refund.

---------- Post added at 06:09 PM ---------- Previous post was at 05:52 PM ----------
[HTC U11  Questions & Answers] christiebunny:
Of course I'm rooted! : The entire point of spending $700 on this silly thing, was so I 1. wouldn't have to deal with VZ's 2-year contract thing, and 2. so I'd have a sensibly unlocked bootloader to allow for rooting and other things! :)

I still have the 'slash' issue, but yes, I'm pretty sure there's more going on in my case-- but having a clean, working, copy certainly can't hurt!
[HTC U11  Questions & Answers] LibertyMonger:
OK I will upload it shortly when I get home
[HTC U11  Questions & Answers] beaups:
You should not be passing around your nv partitions. Device identifiers are cached here and someone is going to wind up blacklisted or with an account fraud alert.
[HTC U11  Questions & Answers] LibertyMonger:
Well that is nice to know Lol. I had no idea. If an ruu doesn't work then the modemst2 partition isn't going to work anyway.

---------- Post added at 09:04 PM ---------- Previous post was at 08:58 PM ----------

So, do you have access to a device that has advanced calling that you can activate your SIM in? And have you ran the ruu.exe for U.S. unlocked and try inserting this activated SIM into? What part of the country do you live in?
[HTC U11  Questions & Answers] EtherealRemnant:
Does a certain command that shall not be named work with temp S-OFF that can fix that? It would be interesting to see if a corrupt partition can be replaced with a working one using that command to change the NV data of concern. I corrupted my HTC 10 somehow when running a RUU (I think the USB cable was damaged if I remember correctly) and had to use that command to restore service after realizing what happened and its worked since without issue. Otherwise I'd have had to pay T-Mobile 180 bucks to replace it - and that's IF they even still had one since they killed the sales so early, I'd probably have been stuck with a "comparable replacement"
[HTC U11  Questions & Answers] beaups:
While s-off in bootloader mode you can use fastboot to erase modemst1 and modemst2. This is also what happens when flashing RUU. These partitions are "caches" of some sort and get recreated in some fashion based on data in the golden master (fsg). If you've done real damage to fsg or items in fsc there's no easy recovery.
[HTC U11  Questions & Answers] EtherealRemnant:
That makes sense. I basically lucked out then.

Hopefully they fix the signal loss issue for you guys soon. It seems odd that it's even happening to Verizon phones that are locked.

I'm guessing flashing WWE firmware wouldn't help either because of VoLTE.
[HTC U11  Questions & Answers] beaups:
Despite the conspiracy theories, it just feels like a bug (or bugs) to me.
[HTC U11  Questions & Answers] EtherealRemnant:
I don't think it's intentional either but I'd play around with it if I had the issue for sure. Of course I don't know the limitations of temp S-OFF so I'd be concerned about bricking it messing with mix and match on the firmware and radios. HTC really threw a curve ball with that one.
[HTC U11  Questions & Answers] LibertyMonger:
Yeah I can't believe that I am the only one not really having any unmanageable issues. I don't believe it's as bad as people are displaying. It kinda makes me look like a liar when all we hear is negative. I don''t know why the heck [MENTION=5027435]christiebunny[/MENTION] can't get her phone working, if an ruu doesn't fix it it has to be an account or SIM card issue I would think. If not I would be pushing for a refund or something. I don't know what to say for the people who cannot even get connected in the first place. That has nothing to do with the reboot/signal loss issue.
[HTC U11  Questions & Answers] Anon2016:
Just my 2 cents. It feels like Verizon is using the U11 as a guinea pig to determine the bare minimum requirements for low end baseline future LTE only phones and they screwed something up with the radio specs.
[HTC U11  Questions & Answers] LibertyMonger:
For what it's worth, I bought my pops an LG LTE only phone from Verizon, just tried to get him something a little better than the 3g flip phone he had. i assumed a 4g flip phone would be better. Anyway, I had issues with it. It would ring twice on my end when calling him but no rings would go through on his end. No matter what I did would fix it. Customer tech support was able to help once, they redid his account on that phonne or something and then it worked for maybe a day then it went back to calls not coming through. I would call, get 2 rings and it would go to voicemail. He missed a bunch of calls because of it. I returned the phone for full refund and credit for the hassle.
[HTC U11  Questions & Answers] christiebunny:
I'm in WA-- If I had a device with advanced calling, I bet I wouldn't have any of these issues. The only one I had (the V10), is a brick, and the phone I'm using for calls for the moment (an old RAZR) isn't compatible with it. :( and neither of the verizon stores I can get to, have phones to activate sims with.

[MENTION=711482]beaups[/MENTION]: If there's no way to flash modemst2 without s-off, I assume dd commands wouldn't work without s-off too? Or is it possible wiping it with dd, would let it be recreated properly so I'd be able to get things working again?
[HTC U11  Questions & Answers] PieceKeepr:
I don't have s-off and I was able to copy and restore modemst2, however it did not restore my signal when I lost it on a reboot. I had to restore a copy of the stock rom to get the signal back.
[HTC U11  Questions & Answers] LibertyMonger:
You used beaups method?
[HTC U11  Questions & Answers] LibertyMonger:
Do you know anyone on T-Mobile or something else you can pop your SIM into?
[HTC U11  Questions & Answers] beaups:
I don't think it's that, either. My opinion is that since this is not a Verizon branded device, it did not undergo the same testing on Verizon's network, and thus some bugs were not caught.

Specific to the band 13 issue, I don't have any reason to believe VZW is causing this. Bands 2 and 4 are NOT disabled as many people here seem to think. The LTE app everyone is using here to lock bands is NOT enabling disabled bands. My theory is that the band priority list is not configured in a way we would expect. It behaves like 13->2->4, where it seems most users would prefer 2->4->13. While the network can band-steer clients, these devices also have a band priority map. Specifically, if you were to reverse the RIL library, you'll see functions qcril_qmi_nas_set_lte_band_priority() and qcril_qmi_nas_get_lte_band_priority() (the "set" function takes a user supplied band_priority_map structure).

There is very little documentation on these libraries/APIs but I plan to research it a bit more in some of my "free" time.

--beaups
[HTC U11  Questions & Answers] ieatabiscuit:
Mine's been running fine. If I flash, I must remove teh SIM first, and if I get the signal bug, I do the RUU.exe. It's annoying, but that's about the worst of it. Those things aside, I love my U11.
[HTC U11  Questions & Answers] LibertyMonger:
Thanks Buddy. We haven't had much help in here and we don't understand how it all works, all I've been wanting to do is figure it out since I do know this phone works great on the Verizon network.
[HTC U11  Questions & Answers] christiebunny:
I've bought a tracfone/t-mobile SIM, and borrowed a regular t-mobile SIM too, neither fixed it :(
[HTC U11  Questions & Answers] Anon2016:
That sounds more than reasonable. If I recall correctly a bug in the Snapdragon was previously discovered by Sprint and an update was pushed to the Galaxy phones and possibly the Sprint U11 for "improved network connectivity/speed" recently.

https://www.pcmag.com/news/354870/sprint-speeds-up-galaxy-s8-htc-u11-phones
[HTC U11  Questions & Answers] christiebunny:
Just a side note, per verizon directly, just last week:

Verizon Certified Open Development Android Smartphones

Created by carol_vzw on Sep 6, 2017 12:52 PM. Last modified by carol_vzw on Sep 22, 2017 6:47 AM.

To ensure that voice and data work properly, only BYOD devices with approved hardware and software are allowed for use on the Verizon Wireless network. These Android devices have been approved.

Manufacturer	Model

HTC U11

So either their definition of 'compatible' is totally screwed up, or there's a major bug someplace that, somehow, their testing dept. missed :p
[HTC U11  Questions & Answers] PieceKeepr:
Yes. I didn't get any errors and the procedure seemed to go as expected but on reboot I still had no signal.
[HTC U11  Questions & Answers] LibertyMonger:
I meant sticking your activated SIM into a T-Mobile device and then yours. But your situation is very bad and weird. HTC will have to make it right. They will still cover your warranty.

---------- Post added at 10:11 PM ---------- Previous post was at 09:49 PM ----------

That sucks. I haven't had the opportunity to try it yet but I know if I start flashing and updating stuff with my SIM card in I can force the signal loss. I been wanting to try it but for me it's not just a reboot issue. I have to be messing with stuff to lose signal. That's what makes it hard to believe they straight stock has the same issue. I think their issue is different.
[HTC U11  Questions & Answers] warriors55:
lost voice and sms/mms

I am having similar issue. Phone was working great for 3 months, anytime I updated custom ROM and rebooted, I would just go into the voice menu, change to LTE/CDMA and it would come right up. Last Sunday, I updated to viper 1.7 and after reboot, only signal I could get was LTE. I could browse/download, use data, but could not send/receive calls or send/receive sms/mms. I went through multiple factory resets, RUU'd to all versions available to the US Unlocked, and custom ROMs each step along the way. But none fixed the issue. Called Verizon, and they tried to trouble shoot, but couldnt figure it out so they noted it down as some supposed tower issue 150 miles away from my location because they have issues similar to what i was having.....what a joke they are. I took my SIM card, popped it my s5, calls/text all with no issues. Put it in my HTC 10, no issues, so Verizon was full of sh*t just like I had already known. Put my brothers ATT sim into the U11, came up no issues, everything worked. Contacted HTC, they told me everything that could be done had been done, and to send them the phone to check for hardware issues. I did so just cause there's nothing else that could be done at this point. If they find no issue, I may just have to ditch Verizon since I buy nothing but unlocked phones now.
[HTC U11  Questions & Answers] LibertyMonger:
Man that sucks. Worries me cause every time I've had that issue the ruu fixed it. But I've never had an issue where data worked but no calls or texts. Or vice versa. Every time I've lost signal it was complete loss, slash mark through the signal bars.
[HTC U11  Questions & Answers] warriors55:
Yea, it was so sudden, cause usually I would have no signal on reboot because in the voice menu, it would default back to the option that had GSM in it, I would just change to LTE/CDMA and would come up almost instantly. After doing update, and after changing the voice setting, I would have LTE active, but slashes through signal, and would get "Voice Service = Emergency Call Only". What's really weird is my IMEI is displayed and correct, and Operator = Verizon Wireless......so I have no clue what's going on.
[HTC U11  Questions & Answers] LibertyMonger:
These issues seem like different issues than I have been having. I've had 2 -U11's and the same experience on both. It seems most of these other issues are account issues. I don't know. But if an ruu didn't fix my issue I would demand my money back. No other way around it.
[HTC U11  Questions & Answers] warriors55:
I've already shipped my phone to HTC, so will have to wait and see what they say about it. But not sure if they will be willing to refund since technically the issue is isolated on Verizon network. I've already confirmed that it's issue free on AT&T, and this being an unlocked phone, I'm 100% sure Verizon isnt going to do a thing either.
[HTC U11  Questions & Answers] jimbob_sf:
I HAVE THE SOLUTION!!!!! I now have a working phone. It's actually quite simple, get another carrier. I picked T-Mobile. Please don't flame me, after weeks of no phone, I'm just happy to have my U11 working again. If this is going to piss folks off, I'll remove it. It is, however, a valid solution...

Note: When joining T-Mobile with two lines, they ask you if you want the 10gb hot-spot and GoGo air service - OR - the Netflix deal. They don't put that in the commercials. Being fluent at XDA means you know you don't need to pay for hotspot capability. Get the Netflix deal and enjoy root.
[HTC U11  Questions & Answers] warriors55:
:laugh::laugh: My solution is to jump to my families ATT family plan if this doesnt get resolved soon. As much as I'd hate to do that. Or sell the U11, use my HTC 10 meanwhile and wait out the next unlocked phone adventure on Verizon LOL
[HTC U11  Questions & Answers] LibertyMonger:
But they advertised Verizon branded phones. I wouldn't take no for an answer if I couldn't get this phone to work I would get my refund.
[HTC U11  Questions & Answers] christiebunny:
This is exactly my issue, and unfortunately flashing an RUU, or trying a different sim, doesn't fix it.

If it I knew for sure that it was a hardware issueI'd have them cross-ship me a replacement (if that's even possible), since I'm past the 30 days. I love the phone otherwise, and I'm pretty sure there's nothing else comparable to its specs, especially the 6/128GB-- and especially that's also unlocked/rootable. :(

And even if t-mobile was an option (which it might be, i got fairly decent service with tracfone on t-mobile's towers, though I'm not sure the overall coverage)..... But I'm on a family plan and can't switch-- and can't afford to pay for both carriers so..... not sure what to do other than hope the next update fixed things.

EDIT: I'm curious if there's anything to this 4FF/4NFC sim thing I saw a few pages back, tho.....
[HTC U11  Questions & Answers] LibertyMonger:
I wouldn't flame you Bud, I'm glad you stuck with the U11. I hate Verizon, if it wasn't for me having 3 other lines on my account I would jump too. It isn't as easy for me to change carriers. But for those of us who can that is the best solution. Congrats bro now enjoy this beast Lol.

---------- Post added at 07:57 PM ---------- Previous post was at 07:54 PM ----------

Yeah hopefully that will work but I really don't think it's a hardware issue. Hopefully the next update will solve your problem but this is a mess. No one freakin knows anything. And no one is saying anything. I know if I had your issue I would get my money back if a replacement doesn't work.
[HTC U11  Questions & Answers] christiebunny:
Progress is being made on figuring out how to fix the issue, it seems-- I've got a suspicion that that 4FF vs 4NFC sim card thing might be a good lead. I'd get my money back if I could; but as I said, I'm past the 30 days, and I doubt there's anything else with similar specs-- this thing's damn near a replacement for my laptop!
[HTC U11  Questions & Answers] LibertyMonger:
If it comes down to it, you just have to fight with them. They will return your money.
[HTC U11  Questions & Answers] warriors55:
I didnt try different Verizon sims, but i tried multiple ATT sims and they all fired up and connected to service with no issues. That's why i'm thinking it cant be a hardware problem. Has to be something on Verizon's side that they are not telling us.
[HTC U11  Questions & Answers] michaelbsheldon:
Most recent phones MUST have NFC on the sim.

I'm waiting to hear from others if there are different 4FF-LTE-NFC sims out there.

Our U11's need their latest version.
[HTC U11  Questions & Answers] Anon2016:
I find this confusing. This issue seems to be isolated to Verizon. Are you implying that all other carriers meet this requirement with the sim card and Verizon just happens to be the only carrier using up old stock?

Edit to add I moved to Verizon in July and ran into this issue with a brand new sim they provided.
[HTC U11  Questions & Answers] michaelbsheldon:
This U11 problem is limited to Verizon. But the other carriers' sims must have Near Field Communications in the sim, similar to Verizon's current sims.
[HTC U11  Questions & Answers] LibertyMonger:
I think when you first get your U11 on Verizon, you should wait to put the SIM in, connect to Wi-Fi and have everything restore and set itself up before popping the SIM in. That is what I do now if I RUU.
[HTC U11  Questions & Answers] michaelbsheldon:
You're right. When you boot the U11 for the "very first" time on a Verizon sim, a popup asks if you want to install carrier

software on your phone and erase anything previous. Doesn't happen again on that phone, even after RUU;s.
[HTC U11  Questions & Answers] LibertyMonger:
How can anyone tell what kind of SIM they have? Mine is just white and says Verizon 4G LTE with a set of numbers on it. It doesn't say what kind of SIM it is.
[HTC U11  Questions & Answers] michaelbsheldon:
It's written on the Verizon card that the little sim snaps out of.
[HTC U11  Questions & Answers] christiebunny:
Yup, every other carrier I know of works great with the U11-- except verizon. I've tried three different verizon sims (all 4FF's), a metro-pcs(i.e. t-mobile) sim, and a tracfone (also t-mobile) sim. They all work great. and all three of the verizon sims, in the old junk phone I'm using in the meantime, also work great.

It's pointing strongly to being a mismatched SIM issue, something in verizon's 'backend' code, or both-- likely a mix of both, but if we're lucky those 4NFC sims will fix things. I've been told by two different people, that they can register on the network just fine with the U11, using them. Unfortunately two is too few to tell whether that's 'coincidence' or 'it works'. :p

It might be a firmware issue, on top of sim/code issues-- but it sure as hell isn't

hardware

, nope!
[HTC U11  Questions & Answers] PieceKeepr:
There are definitely at least two different sim cards available from Verizon. I recently called Verizon and got a tech that new exactly what I meant when I asked about an NFC sim and she sent one. The contact side looks different than the one I got from a Verizon store a few weeks ago.

I haven't had time to figure out how to activate it without another phone (my old phone was an M8) but if/when I do I'll let you know if I see any difference. The tech asked me if I was using the sim from the M8 and I told her initially I did but not now. She said that sim definitely would not work, which was my experience.

If I ruu back to stock and run through the setup on wifi I should be able to activate the sim in the U11 right?
[HTC U11  Questions & Answers] LibertyMonger:
I think that's the problem, I don't think you can activate a Verizon SIM on the U11. I think you want a SIM that's already activated. And not put it in until everything is set up.
[HTC U11  Questions & Answers] Cantholdthis17:
No, you definitely would've lost signal regardless if ur rooted or not.. I'm not rooted and this happened to me before.. u need to go into Verizon and get a new sim card. But if they just try to scan the new sim card it isn't going to work. So have them scan the sim card like if you just opened up a new line.. u might have to bring a phone that's from Verizon it doesn't have to be yours. Once they scan it as a new line you'll be able to use it on ur U 11 with no problem
[HTC U11  Questions & Answers] LibertyMonger:
I may be wrong but there seems to be two different issues. One is getting connected to the network properly and two losing signal after reboot. I think one we're connected properly, then it seems the lost signal after a reboot is mostly caused from messing with things, flashing and installing. I think once you get connected properly, use WiFi and have everything restored the way you want it before popping the Sim card in.