yashsingh1/xdaforums huggingface dataset:
[Nexus 6 Q&A, Help & Troubleshooting] M5Rahul:
Flashed Android M, yesterday and all was well... Today, around 2 pm I saw ' No Service !' agh!!! Never had any issues with 5.1 and 5.1.1 ... :(

I also locked the Bootloader after flashing, another idiotic move!!

I'm in Denver, CO and disabling WiFi calling didn't fix it, neither did a reboot... So, going to call TMO ( have a backup device ) and see what can be done ... sigh..
[Nexus 6 Q&A, Help & Troubleshooting] g2uzer:
When I stayed in aurora Colorado I had the worst T-Mobile reception ever! Got a RMA but still not as good signal as my wife's Gs5. So weird, this was a few months ago. I'm on a different state now and service is great!
[Nexus 6 Q&A, Help & Troubleshooting] M5Rahul:
Great reception here in Denver...I've occasionally seen band 12 LTE too on the Note 4.. It's just that this Nexus 6 is being a PITA now since I upgraded to Android M ... Hopefully I can downgrade to 5.1.1 even with a locked boot loader thru NRT
[Nexus 6 Q&A, Help & Troubleshooting] rbox:
So there's been no word from Google. And I haven't seen anyone getting anything useful out of Tmobile. [MENTION=6314534]MarkAtMoto[/MENTION], does Motorola have anything to update on this? Even just a "we are still looking at it"?
[Nexus 6 Q&A, Help & Troubleshooting] garymachete:
This is the shadiest thing I have ever dealt with. T-Mobile gave me a $100 credit but that doesn't help the fact that my phone doesn't do what I paid for. My phone doesn't even phone. Bs. I tried reaching out to google and the guy was a **** and said he won't help me because I bought it thru T-Mobile. All I wanted was some answers and he had none to give. He told me to take it up with Motorola. I'm going to switch to the G4 regardless, especially after this garbo, but in the meantime what the hell am I sposed to do. I don't even think the n6 is eligible for jump yet cuz it hasn't been 6 months that u need on each phone if I'm correct. I'm just about ready to go to a T-Mobile store and raise hell and make them give me a note 4 and have them transfer my balance paid to that phone and then switch to the G4 the second it drops. Way to go Google.

Edit - Looks like I'm not able to jump til 7-19. And looks like the G4 has landed at T-Mobile stores. I'm gonna see what they're willing to do for me. I'll try to remember to update this for anyone who is going to take the same route as me.
[Nexus 6 Q&A, Help & Troubleshooting] diverbelow:
So over at Google product forums in the Nexus Help Forum section, there is a post called: Nexus 6 Data Connection Failure - Cross carrier, location and OS Version and here is an update which was sent today: https://productforums.google.com/d/msg/nexus/7XqSg2bt8VM/THtP6s-2eAQJ

Here is what it says:

blurfocus said:

In case it helps lower the frustration level due to no response and apparent lack of understanding by Google reps, the Project Fi team (at Google) has acknowledged this issue and claims to be actively investigating and working with partners to fix it. Also, they are aware that this problem is not limited to Project Fi. I have a trouble ticket on this issue that is still open. Hopefully, the Project Fi team will reach out to the rest of the mobile teams and work together on this.

This is an excerpt that was posted by a moderator to the Project Fi forum (open to those who are in the Project Fi trial).

"... Nexus 6 entering a state in which all functions -- including data, voice and messaging -- no longer work. In some cases, users report that their Nexus 6 seems to recover after rebooting, but functions stop working again after a short while.

We’re sorry for the disruption and inconvenience this is causing for folks, and the team is actively investigating and working with partners on a fix. We’ll update the community as soon as we're able."
[Nexus 6 Q&A, Help & Troubleshooting] jbdan:
I just couldn't deal with it anymore and ended up jumping to the G4. I'm so torn because I'm a Nexus user through and through and love stock vanilla. The G4 is like every other carrier phone in that it's loaded with bloat that cannot be disabled or uninstalled :( however, it is a solid device.

What I am happy about in making the switch is at home I stay connected to a relatively strong LTE signal, I don't miss phone calls or SMS, and my phone doesn't battle switching between 3G/LTE and the dreaded "!". This reliable cell connection/service with the G4 is more than worth it. I'll be able to jump again this Nov 1st and am hoping by then the new Nexus/s will be clear and free of this issue. Please do that for us Google :D
[Nexus 6 Q&A, Help & Troubleshooting] nautec:
This past weekend I just chaulked up this problem to being in a crowded area such as Phoenix ComicCon at the convention center. I guess this is more widespread then I initially thought. Funny that people in the Seattle and Phoenix area are seeing this problem the most. Its too bad I really don't have any options since I bought my device on Verizon and switched to T-Mobile.
[Nexus 6 Q&A, Help & Troubleshooting] diverbelow:
According to some of the posts over at this thread: https://productforums.google.com/forum/#!msg/nexus/7XqSg2bt8VM/THtP6s-2eAQJ it appears possible the towers changed and users have not been experiencing any "!" (So far)
[Nexus 6 Q&A, Help & Troubleshooting] TaintedByte:
A few of us did see improvement over the past two days. Some people are still seeing the issue but I only had it happen once this morning (at around 5am) and nothing at all since. However there are still people with the problem. I suspect if something is being done is a slow rollout/fix to make sure more things don't get messed up.

We'll have to wait and see.
[Nexus 6 Q&A, Help & Troubleshooting] kolyan:
This issue came up today on my N6 and T-Mobile. WiFi calling also stopped working completely now. I am stock, rooted, on 5.1.1
[Nexus 6 Q&A, Help & Troubleshooting] Jayslays:
I think I found a fix.

I had this issue up until I reflashed my radio. The radio being, LYZ48E (5.1.1 T-Mobile - Extracted from OTA - 05/23/2015) from this thread http://xdaforums.com/nexus-6/general/ref-nexus-6-modem-collection-t2969380

I'm on Bliss rom 5.1.1

That fixed mine.
[Nexus 6 Q&A, Help & Troubleshooting] Unclean009:
I've been over 24 hours without the issue happening again. I think it's fixed, at least on my setup at my location.

Android M Radio (11.05.16R), 5.1.1, T-mobile, Seattle
[Nexus 6 Q&A, Help & Troubleshooting] mnsportsguy1978:
So apparently since Sprint's 5.1.1 I cannot force WCDMA anymore, anyone have any insight on this as that was my work around on 5.1
[Nexus 6 Q&A, Help & Troubleshooting] mnsportsguy1978:
Nobody has an issue with this anymore?
[Nexus 6 Q&A, Help & Troubleshooting] jbdan:
I do. Had to switch phones I had it so bad. Couldn't deal with the unreliable service anymore. Got a new G4 phone and it's 99.9% reliable now
[Nexus 6 Q&A, Help & Troubleshooting] mnsportsguy1978:
Delete
[Nexus 6 Q&A, Help & Troubleshooting] siraltus:
Is this problem still happening to anyone or has it been fixed?
[Nexus 6 Q&A, Help & Troubleshooting] MedicStuder:
I still am. Motorola replaced my device with no problem bit new device having issues. Tried different radios, new sim card, second nexus 6, different apn settings, dialer code settings.

Nothing has worked. FYI I am on T-Mobile in a heavy LTE area. Note 4 before this device was fine, but areas I got LTE or service with the note I don't get with the n6 or I get the looping between LTE to H to 3g then !.
[Nexus 6 Q&A, Help & Troubleshooting] TamaleJohnson:
I also work in downtown Phoenix where I've had decent LTE coverage with previous devices, but this issue just drives me insane.

I've been talking to T-Mobile for over a month and a half about this problem and so they finally decided to ship me a new Nexus 6. I got it 3 weeks ago and at first I thought the problem was resolved, but it seems to have gotten worse over time. Right now I'm sitting here with absolutely no signal but I'm connected to WiFi so I can still use social apps. I don't receive texts or calls in time, they generally just pour in throughout the day even if I should have gotten them much earlier.

I talked to two T-Mobile techs on Monday and after they had me run through all the APN settings, reseat my sim card, and reboot my phone 6 times; they came to the conclusion that it was my sim card. So they told me to go to a local T-Mobile store where it would cost $10 to replace my card, that was something I argued saying I shouldn't have to pay for it and the rep "notated" the account. I ended up just walking into a T-Mobile and talking to a manager, he said he ditched his N6 weeks ago because he had the same issue. He ended up slapping a new SIM card in there and said that it probably wouldn't help, it didn't.

So I apologize for the rant but after having two stock Nexus 6's and tried a few sim cards; I'm pretty fed up. I have someone sitting next to me with a G4 on T-Mobile with decent reception and my buddy on Verizon with full LTE. It's infuriating, can anyone recommend any solid fixes yet?
[Nexus 6 Q&A, Help & Troubleshooting] dabbill:
Seems to be a pretty common issue with Nexus 6 on multiple carriers. It seemed to start when Project Fi began rolling out. So must have something to do with that. As its happening on tons of devices, no mater what radio or ROM they are running.
[Nexus 6 Q&A, Help & Troubleshooting] RubberDucker:
On Verizon...

I've had my N6 since 6/19. I was on stock for half a day. I unlocked the bootloader, rooted, and flashed Chroma the first night. Had no issues. Since it was a new toy and I hadn't been able to do much on my Note 3, I decided to try another ROM. I flashed Benzo and everything ran fine for a day. I then noticed the ! so I called Verizon to see if it was something they could fix. They couldn't help. They ultimately said to do a Factory Reset. I hung up with them knowing they couldn't help. I decided to try the M radio to see if that fixed it. It didn't. So I Clean flashed back to Chroma. Still on M radio and I haven't had the problem yet. Been back on Chroma for 2 days without an issue. So flashing a new ROM fixed my issue (so far)...

YMMV.
[Nexus 6 Q&A, Help & Troubleshooting] jezuss:
I found a temporary repair

I had nothing Nexus 6 signal at startup (never), but I found a temporary repair, the only thing that I did.

I just started my nexus 6 in the bootloader and select QCOM, the phone starts normally. Now I have signal, data, everything works fine.
[Nexus 6 Q&A, Help & Troubleshooting] Bohemus:
Is this still an issue? Started experiencing it on May 5 like many others, had to go back to my N5 because I was constantly missing calls and texts. I'd like to get the N6 again now that TMO has released the wifi calling update, but I'm not going to until the LTE/HSPA/3G and ultimately the ! signal issue has been resolved.
[Nexus 6 Q&A, Help & Troubleshooting] nautec:
Everytime I head up to Phoenix downtown area I experience this. I have no issues (except for areas with weak signals) in Tucson.
[Nexus 6 Q&A, Help & Troubleshooting] burdo:
What does QCOM do in the bootloader?

---------- Post added at 09:05 PM ---------- Previous post was at 08:10 PM ----------

I have no idea what it does but It seems to work for me too. Can anyone else try and confirm? The only other thing I did was just to change the name of the APN of my carrier.
[Nexus 6 Q&A, Help & Troubleshooting] burdo:
Bleh. Not working. The problem is still present.
[Nexus 6 Q&A, Help & Troubleshooting] ozziedog:
I have the same thing on my Nexus 6 64gb on at&t, CS told me that it was because it was not bought from at&t and doesn't get the network enhancements they went as far as continuing disruption of network connection to the network. They offered to sell me their 64gb version for over $800. Bunch of crooks.
[Nexus 6 Q&A, Help & Troubleshooting] bobprobert:
i had the same problem until i flashed the M2 radio and jdx rom. hasn't happened since
[Nexus 6 Q&A, Help & Troubleshooting] mrphil101:
I had the same problem, tried the reboot with qcom, and that didn't work. I toggled my wifi, and haven't seen the exclamation marks since.??. Been about 24 hrs now.
[Nexus 6 Q&A, Help & Troubleshooting] burdo:
What do you mean you toggled your wifi? You turn it off?
[Nexus 6 Q&A, Help & Troubleshooting] mrphil101:
Yes, I toggled it off and on. Last night I updated my ROM and had the problem as soon as I started, did the WiFi toggle again and they are gone. Weird but it works for me.

Edit: Ok. I was incorrect, when I connect to home router, the ! goes away, and data works ok kind of. Also even with the ! Beside the icon, i still get calls so i assumed things were ok. Not so. Can get SMS, but not mms msgs. What a mess.

Another edit: looking at APN settings, found the APN protocol set to IPv6, changed it to IPv4/IPv6 and they are gone for now.
[Nexus 6 Q&A, Help & Troubleshooting] elxel:
Solution?

So if I got the whole thing correctly, the possible solutions are:

You could set your phone to work in 2G or 3G mode (but then you have no LTE).

You can set your phone to be LTE only (but LTE isn't everywhere).

You can use Android M radio.

Am I right or did I miss something?

I originally thought about going full Android M, but that still has it's own problems, so not going there yet. I have a "stock" phone with 5.1, but there is no fix for this problem, so I have to do something (using 3G only is annoying once you are in a location, that has either E or LTE and nothing else).
[Nexus 6 Q&A, Help & Troubleshooting] tursoke:
Hi ho, same problem here as well, in Finland. Gonna flash the M2 radio to see if it's any help. My observations seem to indeed support the theory that it's related to switching from 4g to 3g. Sometimes the phone shows the !, other times it just thinks it has reception when in actuality it doesn't.

Switching wifi on/off yields no results, neither does trying to force 4g or 2g. Sometimes I even need 2 reboots to fix it. Stock rooted 5.1.1 with leankernel.

//Edit

Eh, I lost connectivity all together with the M2 radio. I guess it wasn't the fix I needed.
[Nexus 6 Q&A, Help & Troubleshooting] tursoke:
Is this still the case?
[Nexus 6 Q&A, Help & Troubleshooting] elxel:
I had the same result. Stock 5.1.1 plus M2 radio. I'm gonna try different radios as well, but I'm pesimistic here.
[Nexus 6 Q&A, Help & Troubleshooting] tursoke:
I just went through my local service provider's forums, and at least here in Finland they've narrowed the reason down to certain SIM card types not being quite compatible Nexus, or in all probability, Lollipop. So far my problems disappeared following their tip of enabling SIM code lock, and waiting 10sec+ each time before entering the code so the card can catch up. Apparently they had similar trouble with an older HTC phone, and cited the reason as the SIM card's toolkit's inability to be quite fast enough to load, hence the need for few seconds of waiting, and in this case Lollipop/Nexus doesn't seem to know how to compensate.

So far has worked flawlessly for me, but it's only been a couple of hours.

Probably isn't the only reason for this though, but worth a try.

//EDIT

My Nexus wouldn't let me(well it did TRY, just nothing happened) enable the sim lock, had to swap it to my trusty G2 and enable it with it.
[Nexus 6 Q&A, Help & Troubleshooting] elxel:
Interesting, I have to give it a try if the following doesn't help.

Anyway, I flashed the radio incorrectly before (or not flashed at all; I'm not sure, fastboot pretended that everything was OK), now I flashed the radio again. I'll try and see what happens.
[Nexus 6 Q&A, Help & Troubleshooting] :
My data has been out since early June. Have tried everything listed here except go to the M2 radio (up next) and a non-stock ROM. Doesn't matter where, doesn't matter if forced to LTE, forced to 3G, etc. Even though all metrics say no connection, I do get text based emails in the background, so a little like running a WAP connection on my Palm VII back in 2000.
[Nexus 6 Q&A, Help & Troubleshooting] bobprobert:
yes i have not had the problem again
[Nexus 6 Q&A, Help & Troubleshooting] flashallthetime:
Seems I have a data problem with only cm based Roms except dark unicorns. Flashed chroma and Sokp and my data fired up right away
[Nexus 6 Q&A, Help & Troubleshooting] mrphil101:
I am on ASOiP rom & tmobile. Have to change apn settings for IPv4/IPv6 after flashing and it works. Used it for a week thinking I had the same problem, but remembered I had to change that on a previous flash.
[Nexus 6 Q&A, Help & Troubleshooting] elxel:
So I got the latest M preview radio, deleted all APNs but one, set the IPv4/IPv6 value in that APN and, just to be sure, obtained a new SIM. Neither of that helped. It seemed OK at first, but eventually the exclamation mark was back. Fortunatelly, I can work on 3G networks, which are reasonably fast, but hell - I want LTE.
[Nexus 6 Q&A, Help & Troubleshooting] :
Class Action Lawsuit - Nexus 6

No matter if 3g or LTE I get <2400bd modem speed.

I spoke with a law firm in Houston today and as it turns out three of their partners have the same problem. I got a call back from one of them and they are seriously thinking of a class action suit against Lenovo. Giving them my technical opinion about this being a Google issue, he agreed but believes that Lenovo will be much more open to settling than Google, and he also likes the idea that it may cause Lenovo to dump Google as their primary OS when something else opens up. My two cents was an either proposition: 100% refund or an iPhone 6 Plus. Just want to stick a thumb in Google's eye. This is my fifth Android and my last. Going to the iPhone 6 Plus and hoping to put a few H1B visa holders out of work at the Googleplex.
[Nexus 6 Q&A, Help & Troubleshooting] bluejjs78:
Yesterday afternoon I noticed my phone was "configuring your cellular network." Prior to this notification I was getting the "!" quite often and missing phone calls. Since the notification I have had no issues with the phone.

My data usage with Project Fi also went from almost .70 GB to .36 GB. (I use wi-fi a lot). Perhaps Google fixed the problem and refunded me some data.

For those that will ask, I am on build LYZ28E.

Update: Got same notification as yesterday and the networks went back to their crappy ways. Disappointed. It may even be worse than before.

Update 2: Just got an OTA for LYZ28J. LTE is now working in my home and it has never worked there before. Let's see how long this lasts.
[Nexus 6 Q&A, Help & Troubleshooting] mrphil101:
So can you tell if APN settings were changed? Did they update your radio to new version? Be nice to know if they changed on your end or their s.
[Nexus 6 Q&A, Help & Troubleshooting] bluejjs78:
Nothing updated that I can tell, just started working better...for a time. Got the same notification today at the exact same time as yesterday and afterwards the reception was back to ****.
[Nexus 6 Q&A, Help & Troubleshooting] bluejjs78:
Just got an update to LYZ28J and LTE is working at home where it has never worked before. Fingers crossed.
[Nexus 6 Q&A, Help & Troubleshooting] mrphil101:
So I would guess u are running stock?.. Hopefully a good sign. G-luck!
[Nexus 6 Q&A, Help & Troubleshooting] bluejjs78:
Yes, running stock. Only had the phone a couple of weeks and not a whole lot of time to play with it. My trip to Vegas was not as exciting with 3g or worse data though. Hopefully with this latest build they corrected something. Irritating that I bought the phone from Google Store upon Project Fi's advice and I cannot get a Project Fi build without flashing it (might do that soon though).

I will try and post updates as possible....with our powers combined....
[Nexus 6 Q&A, Help & Troubleshooting] :
So I purchased my Nexus 6 in December 2014 in the AT&T store. LTE was running fine for a few months and then I noticed the signal degrading at my work. Haven't had any signal issues since I switched from unlimited data, where I used to get throttled nonstop.

Now since manually updating(tired of waiting for OTA) to LMY48I I am getting an H with no signal bars or an exclamation mark with no signal bars only at work. When I go outside at work I get full LTE signal. I do work at a Data Center, so not sure if this is the issue. Still working in the same cubicle for over a year though.

I rebooted the phone into Safe Mode and got LTE with about 2 bars for signal. Rebooted back into Normal mode and back down to H with 1-2 bars.

Followed the suggestion from OP in update, it says to manually change to LTE only mode, where you get LTE or nothing.

Since making that change I am now on 2-3 bars of LTE, everything is working fine. Will update if anything changes.
[Nexus 6 Q&A, Help & Troubleshooting] enyce9:
I am having this issue on Sprint. Any way to fix?
[Nexus 6 Q&A, Help & Troubleshooting] prdog1:
I'm still on Z version on Verizon. I will try and update this weekend. I'm a Nurse so can't jeopardize my phone during the week. Haven't seen this since the 5.0-5.1.0. I had to get rid of Verizon 5.1 E radio and upgrade and turn off Volte. Since upgraded to 5.1.1 Z version have had no problems. Have you tried flashing all stock factory images and starting over. Need a clean flash to troubleshoot.
[Nexus 6 Q&A, Help & Troubleshooting] enyce9:
I was thinking about trying the m preview.... I am stock unrooted. Can I flash stock factory image without root?

Edit: found the tutorial for flashing factory image.

I'll give that a try tomorrow...
[Nexus 6 Q&A, Help & Troubleshooting] Sportster71:
Manual APN Added

I bought a Nexus 6 from Amazon last week on sale, had it for a few hours, made a backup and began flashing away. I tried a few roms and then decided to upgrade to the M preview. Didn't think that there were enough customizations so I flashed back to 5.1.1 and downloaded Pure Nexus. Then I noticed my data wasn't working so after searching around I saw how many people had the same problem.

Finally found the fix on another thread here and sent it to myself, tried it and it works. I'm a noob and I can't post links but here is the fix.

support.t-mobile.com/docs/DOC-17581

Following the directions for adding a new APN fixed it for me. I
[Nexus 6 Q&A, Help & Troubleshooting] Bohemus:
Now that Marshmallow is out for the N6, has anyone noticed if the issue has been resolved?
[Nexus 6 Q&A, Help & Troubleshooting] Bohemus:
Debating if I should buy the N6 again after running into the no data problem. I'm assuming marshmallow has resolved this issue, but wont buy until I hear some kind of confirmation from a few people in XDA.
[Nexus 6 Q&A, Help & Troubleshooting] chrisram88:
This issue has been long gone for me. Tmo in souther cali..
[Nexus 6 Q&A, Help & Troubleshooting] Bohemus:
Thanks for confirming. Anyone in the Phoenix area able to chime in?
[Nexus 6 Q&A, Help & Troubleshooting] sumpf2:
I just got a new Nexus 6. As soon as I got it I flashed the latest Android 6 factory image (MRA58R) and now I'm getting these no-data-problems too. Often it gets overall bad receiption, but sometimes it will cycle through 3g, H, H+ and 4g, sometimes showing a little "!" right next to the data-icon. Mostly I get the "!" on 4g. Not had any of these issues with the Galaxy S6 edge and the edge+ I used before (they both mostly had great 4g signal..).

I'm on Base (E-Plus) in germany. Does anyone else still have this issue?
[Nexus 6 Q&A, Help & Troubleshooting] nickoArd:
Im on PureNexus 6.0.1 rom, in Argentina, and im getting these problem. :mad: :mad: :mad: :mad:

I tried everything, all modems, all apps.. just works select WCDMA Only in modem options (*#*#4636#*#*) and turn on/off the data connection many times, but its works only a few times, not always.

im so angry :mad:
[Nexus 6 Q&A, Help & Troubleshooting] veedubsky:
Smh... I'm guessing they just don't care... I've tried all variations from 5.0 to 6.0.1... Glad I just bought this brand new... And will now essentially be stuck with this crap for a year or two...