yashsingh1/xdaforums huggingface dataset:
[Nexus 6P Q&A, Help & Troubleshooting] buzz880:
Fixed for me

Had this issue for some time at home in Canada - Fixed Now.

I was convinced I needed a new phone after a road trip in the US with Data Roaming Enabled, it got so bad I had no data at all at most points, I was rebooting multiple times a day to try and fix (not always successful). I think because I was traveling and jumping from carrier to carrier.

Assuming Google would make me reset it to stock anyway, so I went ahead and did that. I let all my apps reinstall so everything is the way it was except the issue has been gone for almost 2 weeks now. LTE all the time, in US and Canada, no issues, no need to reboot.

Phone also seems smoother now, I was getting some lag here and there particularly when using the keyboard. Not exactly related but glad to have it resolved.

Stock 6P, latest OTA.
[Nexus 6P Q&A, Help & Troubleshooting] wooddale:
That's what the OTA was all about finally fixed stuff
[Nexus 6P Q&A, Help & Troubleshooting] buzz880:
Maybe. But didn't fix it until the complete reset.
[Nexus 6P Q&A, Help & Troubleshooting] wooddale:
I was gonna say that I'm unlocked and rooted and it seemed like I had to clean flash twice. So ya I believe it. Whatever it worked.
[Nexus 6P Q&A, Help & Troubleshooting] Crakinarse:
Thinking of asking for a refund myself. The phone problems are growing like a fungus.

May I ask what phone you will get after this?
[Nexus 6P Q&A, Help & Troubleshooting] crowsnestitsupport:
I know its been said before... But the new radio with Android N has completely fixed the LTE issue. You can download the image and extract the radio and flash it with ADB. It was like night and day difference for me on both Verizon and AT&T. I don't use the other providers so I can't speak for them.
[Nexus 6P Q&A, Help & Troubleshooting] Crakinarse:
Ok, so lets pretend that I am a moron.

How do I do that stuff?

Is there a linky that spells it out for a nooob like me?

I mean I know Unix and stuff so I am not a complete idiot. Just never root my phone or anything.
[Nexus 6P Q&A, Help & Troubleshooting] crowsnestitsupport:
Sorry.. I wasn't very informative. This is a fantastic guide for the 6p. http://xdaforums.com/nexus-6p/general/guides-how-to-guides-beginners-t3206928

You do not need to root your phone to flash the new radio. But keep in mind that if you are unlocking your bootloader for the first time it will factory reset your phone.
[Nexus 6P Q&A, Help & Troubleshooting] Crakinarse:
Thank you very much. I will attempt tonight....while sober. :laugh:
[Nexus 6P Q&A, Help & Troubleshooting] mistermojorizin:
just to double check, for the Verizon variant, other than flashing the new radio image, did you have to flash anything else? reset apis? I just flashed 3.61 from N, double checked in settings baseband says 3.61, but phone still often boots into 3g or no signal.
[Nexus 6P Q&A, Help & Troubleshooting] dratsablive:
I tried using new radio on latest M firmware but it stuck at android logo wouldn't finish booting. However I flashed it using Flashfire. Not sure if that would make a difference.
[Nexus 6P Q&A, Help & Troubleshooting] crowsnestitsupport:
I also did the bootloader but that should not matter. I haven't had a single LTE issue since I switched and I flashed it the day it came out. I get instant LTE all the time after every reboot.
[Nexus 6P Q&A, Help & Troubleshooting] Crakinarse:
Ok, so I did my first radio flash last night and things went as well as could be expected.

Although it has only been a few hours so far the phone seems to be getting and keeping a better connection.

One question I have after doing this is IF google comes out Android N or another update that I want for some reason do I have to put my phone back to stock before attempting an upgrade?

Right now I am still "unlocked" I should keep it that way right?
[Nexus 6P Q&A, Help & Troubleshooting] mistermojorizin:
flashed both bootloader and n radio and it didn't fix it...radio even seems weaker
[Nexus 6P Q&A, Help & Troubleshooting] crowsnestitsupport:
There is an even newer one, 3.62 with the 2nd release of N. I have upgraded 6 different 6p's to that 3.61 and 3.62 radios and all saw huge improvements. Maybe you have bad hardware. Or a bad sim card.
[Nexus 6P Q&A, Help & Troubleshooting] wooddale:
The new MM bootloader worked for me. As far as radios I try them all I'm on the old 2.15. Radios are different in as you kind of find the one that works best on your phone in your location.
[Nexus 6P Q&A, Help & Troubleshooting] mistermojorizin:
hardware is possible, but not likely. First, everything worked on 6.0.0 flawlessly. Second, after toggling airplane mode on and off 1 time after rebooting, my phone holds a strong LTE signal until next reboot, even if that's a week or two later.
[Nexus 6P Q&A, Help & Troubleshooting] danyjad:
The annoying issue I have here is that LTE completely drops, showing selected network unavailable and it happens every 5 min or so and immediately comes back full bars 5 sec later. Any idea why? HSPA works fine, It's driving me crazy! SIM is brand new also.

Thanks!
[Nexus 6P Q&A, Help & Troubleshooting] luckyfate:
Hi

I also flashed radio v0. 129, and it caused network or Sim card error, what stock rom did you flash to fix the issue. I went to Heisenberg's thread and found the factory image rom, which one should I flash? Thanks
[Nexus 6P Q&A, Help & Troubleshooting] pjbeee:
Quick fix?

What seems to work well for me is this: I created a copy of the default APN profile. When my phone sticks on "H" , I simply go into Settings and select the other APN profile. The phone switches back to LTE in short order.

So far, this solution has worked several times in a row.

Nexus 6P / 64GB, 6.0.1, MTC20L, rooted, Straight Talk/AT&T.

Will try to remember and return here if I have more info. Meanwhile my "quick fix" continues to work OK. Switching to the different profile typically restores LTE after a few secs to 1/2 min (as long as LTE is available at the time).

Update approx. 11/13/2016:

Also just read about this for AT&T, so I am trying this for the APN Type (in this order). . .

default,admin,fota,mms,supl,hipri

Update 11/16/2016: So far, the above APN Type settings have worked perfectly. Probably only one of two explanations for this: either the APN settings change fixed the problem OR there was some network issue - now resolved - causing the problem in the first place. I am betting on the former. Either way, thus far the phone has only reverted to "H" when on a call (no surprise there) or when there is truly no LTE service in an area.

I suppose this could be related to some app update (doubtful), and I'm noting here that no firmware/ROM updates have occurred during this time.

11/25/2016: Have needed to switch APN profiles to get LTE as described above only once since my last update here. This is pretty close to perfect. If I had been more patient, it might've switched by itself.
[Nexus 6P Q&A, Help & Troubleshooting] galaxys:
^Look in settings about phone. Chroma does not install radios.
[Nexus 6P Q&A, Help & Troubleshooting] circuit89:
I have the same issue most have. Running 6.0.1 on Fido in Canada. I rarely connect to LTE. Its always switching between 4G and HSPA.
[Nexus 6P Q&A, Help & Troubleshooting] lbarb2133:
im having issue on att

---------- Post added at 02:53 AM ---------- Previous post was at 02:07 AM ----------

im on att when i turn phone off than boot it its always on h.than i put it into airplane mode on than off lte comes back on.than i turn phone off while in airplane mode than turn it on i turn airplane mode off and lte appears.i hope they fix this real soon.
[Nexus 6P Q&A, Help & Troubleshooting] nexuus:
I'm on T-Mobile stock with systemless root and xposed, also started experiencing this issue after flashing 6.0.1 after a complete wipe.
[Nexus 6P Q&A, Help & Troubleshooting] lbarb2133:
can my carrier att reprovision my phone pr is it strictly a bug from 6.0.1 update?

---------- Post added at 04:21 AM ---------- Previous post was at 04:20 AM ----------
[Nexus 6P Q&A, Help & Troubleshooting] outofluck:
This would be an issue with the 6.0.1 update. AT&T can't do anything to fix it.
[Nexus 6P Q&A, Help & Troubleshooting] lbarb2133:
thanks

---------- Post added at 04:53 AM ---------- Previous post was at 04:51 AM ----------

thank you
[Nexus 6P Q&A, Help & Troubleshooting] MikaelG:
Same issue here on Rogers in Canada. Going in airplane mode don't seems to bring LTE for me but going into the INFO menu (*#*#4636#*#*) and turn off radio than selecting LTE Only and radio back on bring LTE connection, than I switch it back to auto. Then it seems ok until a reboot. Really annoying bug! How they fix it soon.
[Nexus 6P Q&A, Help & Troubleshooting] tech_head:
Phone going to 3g for the first time ever after updating to 6.01. Verizon
[Nexus 6P Q&A, Help & Troubleshooting] 341464:
Taiwanese here. Same issue after flashing the latest 6.0.1.
[Nexus 6P Q&A, Help & Troubleshooting] Ulver:
Same here on T-Mobile.
[Nexus 6P Q&A, Help & Troubleshooting] eudemonky:
guys，Use*#*#4636#*#* into the Testing, click Phone information, switch CELLINFOLISTRATE to 0, reconnect the LTE can solve the problem H display, but after the restart the phone still can not directly show the connection LTE
[Nexus 6P Q&A, Help & Troubleshooting] bsg411:
Im on the Purenexus 6.0.1 build with new BL and radio and I have the H/H+ only issue too on ATT. I toggled the airplane mode and it did work. when data recovered from airplane it first showed H....then after about a minute it showed LTE again. After a reboo tho....it went back to H+. Definitely an issue here.
[Nexus 6P Q&A, Help & Troubleshooting] jeebuspwnz:
has anyone notified le Googs yet? I'm thinking this is pretty widespread.
[Nexus 6P Q&A, Help & Troubleshooting] The Weasel:
This worked immediately. Looks like I'll keep an eye on it until they fix this bug. Gonna hit up Google and start making this an issue.
[Nexus 6P Q&A, Help & Troubleshooting] bsg411:
send us the link so we can back u up on the complaint.

also can anyone confirm going back to the old radio does not fix the issue?
[Nexus 6P Q&A, Help & Troubleshooting] jeebuspwnz:
It doesn't fix it for me. Same long-wait for LTE to arrive.
[Nexus 6P Q&A, Help & Troubleshooting] tjex:
Same issue since 6.0.1 on Fido/Rogers, phone goes into 3G mode, forcing LTE via *#*#4636#*#* didn't work. What did is putting the phone in airplane mode and switching it back.

Is there a tracking issue with google we can go comment on and upvote? Couldn't find one.
[Nexus 6P Q&A, Help & Troubleshooting] elreydenj:
Please send the link so that we can all chime in and let them know it is multiple carriers and widespread.
[Nexus 6P Q&A, Help & Troubleshooting] tech_head:
Phone connecting at 3G since yesterday (Update). Before that I never saw 3G on the display.
[Nexus 6P Q&A, Help & Troubleshooting] circuit89:
Yeah. Hopefully someone opens up a bug issue report with google. We can then contribute to that report.
[Nexus 6P Q&A, Help & Troubleshooting] raghu007:
same here on at&t.. going into settings - more - cellular networks and toggling between 2g and LTE .. brings back LTE. Airplane mode doesn't work for me.
[Nexus 6P Q&A, Help & Troubleshooting] sitnlow4life:
Same issue here after 6.0.1 update

In Detroit Michigan
[Nexus 6P Q&A, Help & Troubleshooting] Meto5000:
On Verizon here and the toggling of airplane mode restarted LTE service for me instantly.
[Nexus 6P Q&A, Help & Troubleshooting] The Weasel:
Sorry, got busy at work and I can't log into my account for some reason. Someone else can submit the complaint or I'll do it when I get home.
[Nexus 6P Q&A, Help & Troubleshooting] Empty Hand:
I was having connection issues with the new radio as well. My phone was showing LTE, but wouldn't connect well. Updating the APN settings didn't work. Flashing the old radio did fix the issue. My only concern now is regarding the MMS bug fix in 6.0.1 - if that fix was in the radio (which I'm not sure it was) I may be back to not receiving MMS messages.
[Nexus 6P Q&A, Help & Troubleshooting] dwertz:
4G LTE issues

Same problem here since 6.0.1 update on Verizon.
[Nexus 6P Q&A, Help & Troubleshooting] nrage23:
I had LTE initially and lost it yesterday on Verizon after 6.0.1. I used *#*#4636#*#* and went into phone information. Set preferred network type to LTE/CDMA auto prl. Inside the same menu turned off radio then turned radio back on with LTE ever since.
[Nexus 6P Q&A, Help & Troubleshooting] dwertz:
I will try that. Thanks
[Nexus 6P Q&A, Help & Troubleshooting] coolcat67:
Sorry for the delayed response. Yes I have tried rebooting many times with wifi on and wifi off and my phone consistently connects to LTE. My APN is the VZWINTERNET APN that auto populates with my Verizon 4G LTE SIM. That is the only APN listed in my phone. I deleted all the others a while ago. Also my phone is set to global as preferred network type.
[Nexus 6P Q&A, Help & Troubleshooting] woodensoul2k:
I'm not sure if this is the correct area for a bug report but someone opened the following in the nexus help area.

https://productforums.google.com/forum/#!topic/nexus/_j0H4xPLeJE;context-place=forum/nexus
[Nexus 6P Q&A, Help & Troubleshooting] aurena:
Just installed the OTA 6.0.1 and instantly had issues with LTE. Im on Sprint, pretty sure this is unrelated to the carrier. Once on 3G airplane doesn't always work and need a reboot. Also noticed coming off calls i will drop back to 3G and the same issues persist, but random.
[Nexus 6P Q&A, Help & Troubleshooting] ChronoReverse:
Is anyone here rooted? Does going back to the old modem help?
[Nexus 6P Q&A, Help & Troubleshooting] nadiros:
[FIXED]

I had this issue as well. I'm in Vancouver, and on Bell's network. Flashing the previous radio did nothing, and the service menu fixes only last at the longest til a reboot.

What fixed it for me (for 2 days so far) was flashing radio v01.29 via fastboot. It gave me a sim card error at first but after an extra reboot all has been well for a couple days and many reboots since.

I hope this helps somebody, as it was bugging me enough to downgrade back to 6.0.0. The radio can be found in the general section in Heisenberg's fantastic index thread. Thank that dude, he does a lot of work.:good:
[Nexus 6P Q&A, Help & Troubleshooting] bsg411:
im rooted and went back to old radio....still have the issue.
[Nexus 6P Q&A, Help & Troubleshooting] murphyjasonc:
I updated to 6.01 yesterday. I was on LTE after the first reboot and thought everything was good. I went through a 3g area and the phone would not switch back to LTE when I got to a better area without toggling air plane mode. I rebooted a couple of times last night and so far haven't had any problems today. I'm rooted and flashed the new radio and bootloader also. Verizon network.
[Nexus 6P Q&A, Help & Troubleshooting] wayne8821212:
Old Radio

I unrooted via by installing the 6.01 img files (bootloader, radio, boot, cache, recovery, system and vendor) via fastboot. I don't think you have to be rooted but flashing the old radio via fastboot works like a charm.....I'm on ATT (fastboot flash radio radio-angler-angler-02.15.img)(if you place the radio image file in the same folder as your fastboot etc).
[Nexus 6P Q&A, Help & Troubleshooting] ChronoReverse:
So that's one affirmative and one negative. Can more people try fastbooting the previous radio?
[Nexus 6P Q&A, Help & Troubleshooting] Pecata:
I have noticed that after upgrading to 6.0.1 my phone would be in Hspa mode instead of LTE mode. Attempted airplane mode and reboot-still the same thing.

Then I did the following- went to my apn settings and reset to default, then I went to the settings->more->Cellular Networks-> Preferred Network Type and switched it from LTE to 3G. Waited to connect and then switched back to LTE.

Now my phone connects to LTE upon reboot and I have no more issues.

I hope this helps.
[Nexus 6P Q&A, Help & Troubleshooting] elreydenj:
What people above are missing is that sometimes the phone will boot 5 or 6 times consecutively with LTE but it has a problem with 3G to LTE handoff as explained by this poster. If you are on the older radios it will eventually lock onto H or 3G and you will have to toggle back to LTE. Mine boots to LTE ALMOST all the time but when it locks on 3G at boot sometimes it will not switch over to LTE. Best thing we can do is all jump on the Google help thread and make the issue known. Someone started post it appears.
[Nexus 6P Q&A, Help & Troubleshooting] borsin:
Will the radio from 6.0.0 work and 6.0.1 and vice versa? I'm on T-Mobile and my LTE is weak. I'm hoping there is some difference in connection quality across the different radios. Is there a link somewhere with the radio options?
[Nexus 6P Q&A, Help & Troubleshooting] nadiros:
Look in the General threads. There's an index thread pinned there with the radio links in the first post
[Nexus 6P Q&A, Help & Troubleshooting] wayne8821212:
6.00 Radio

Flashing the old radio works like a charm! Strangely all of the sudden the new radio is suddenly giving me LTE wildly fluctuating speeds of nearly 40mbps/12mbps down to the low single digits. The old radio is more stable. I'm going to flash back to that.
[Nexus 6P Q&A, Help & Troubleshooting] dwertz:
I tried the *#*#4636#*#* and it appeared to work but then when I made a phone call, it immediately hung up like I had no connection. I fastboot the old radio and still same issues. I ran my backup to 6.0 and it works on both old and new radio. Next thing I want to try is a fresh install.
[Nexus 6P Q&A, Help & Troubleshooting] richport29:
Would I have to unlock the bootloader to flash the old radio?
[Nexus 6P Q&A, Help & Troubleshooting] troymz1:
Nevermind
[Nexus 6P Q&A, Help & Troubleshooting] badboy47:
:/ looks like a broken update
[Nexus 6P Q&A, Help & Troubleshooting] 341464:
You're not supposed to go LTE only. Some carriers that don't support VoLTE still needs to switch back to 3G for calling.
[Nexus 6P Q&A, Help & Troubleshooting] dwertz:
I never said I went on LTE only. I am on Verizon, I switched it to LTE/CDMA auto (PRL) and changed CELLINFOLISTRATE to 0. I have VoLTE on the phone and from Verizon turned off because its choppy. This configuration does not work for me.

The only thing that works in my case is to be on rom 6.0 with either radio. I am getting ready to do a clean install of 6.0.1 to see if it works.
[Nexus 6P Q&A, Help & Troubleshooting] 341464:
Alright, and I assumed that because I did that and my phone could not call at all.
[Nexus 6P Q&A, Help & Troubleshooting] xryousukex:
Can I use twrp to flash the radio img? Or should I do it through fastboot?
[Nexus 6P Q&A, Help & Troubleshooting] dwertz:
only fastboot
[Nexus 6P Q&A, Help & Troubleshooting] PieOfJustice:
Hmmmm. Rogers, 6.0.1 Stock and only get H or 3G with LTE kicking in briefly. Can't remember if it was like that before rooting. I'll have to play around tomorrow.

EDIT: I can force LTE with Phone Test and force band but lose it after reboot.

EDIT 2: No longer losing after reboot. I'm mystified. I'm going to reflash and see what happens.

EDIT 3: Flashed complete 6.0.0 M and after verifying all was stock locked the bootloader. That did another factory reset. Upon reboot LTE and cell worked. Got an immediate promt to update to 6.0.1 and did so. After OTA cell reads NO SERVICE until I turn on airplane mode, then off. After that cell returns and LTE is restored until reboot. So we definitely now know it's a 6.0.1 issue and not root.
[Nexus 6P Q&A, Help & Troubleshooting] mr mystery:
I see nothing about this widespread issue on any Android news sites. An issue like this should be getting attention so Google fixes it. Does this not happen to everybody? I'm purposely not updating because of it.
[Nexus 6P Q&A, Help & Troubleshooting] PieOfJustice:
It seems to be certain carriers. ATT, BELL, ROGERS that I know of. I thought it was poor weather in my area effecting me, until I did today's tests. It's not THAT bad. You have to do an extra step after reboot. That's about it.
[Nexus 6P Q&A, Help & Troubleshooting] caifan:
It's happening on Verizon as well. I have to toggle airplane mode coming from a reboot to get LTE.
[Nexus 6P Q&A, Help & Troubleshooting] mistermojorizin:
Verizon here. Phone usually boots in 3g mode now and i know at least 3 ways of getting it to connect to LTE - 1)airplaine mode on and off 2) turn radio on and off in the "phone info" menu 3) soft reboot. what's interesting though is before getting it to go to LTE, if i change it to "lte only" mode in "phone info" menu, it will not be able to connect to data at all. so that tells me that lte functionallity is some how disabled at boot. i've tried flashing the 2 older radios and it made no difference.
[Nexus 6P Q&A, Help & Troubleshooting] mistermojorizin:
boot into bootloader/fastboot mode and look at the writing in the lower left. where it says "baseband" that is your radio version
[Nexus 6P Q&A, Help & Troubleshooting] Alekos:
Everyone needs to go here and post this issue. It's the only way they might listen:

https://productforums.google.com/forum/m/#!category-topic/nexus/nexus-6p/_j0H4xPLeJE
[Nexus 6P Q&A, Help & Troubleshooting] dwertz:
I ended up doing a clean full install including wiping userdata and now I dont have any LTE issues with 6.0.1
[Nexus 6P Q&A, Help & Troubleshooting] mko000:
Is there any user outside of North America with this problem?
[Nexus 6P Q&A, Help & Troubleshooting] caifan:
And it survives a reboot?
[Nexus 6P Q&A, Help & Troubleshooting] guidojusto:
I'm having issues with LTE in Argentina since 6.0.1.
[Nexus 6P Q&A, Help & Troubleshooting] dwertz:
So far so good.
[Nexus 6P Q&A, Help & Troubleshooting] circuit89:
I did a clean install as well. Twice just to check if it got fixed. No luck so far. Its not a big deal cause of that one extra step I need to perform after a reboot and I barely reboot my phone anyways.
[Nexus 6P Q&A, Help & Troubleshooting] dwertz:
I thought I was good after full wipe including userdata. The signal showed 4G for a few days. Today I sent an MMS and it got stuck and no 4G signal. back to 6.0
[Nexus 6P Q&A, Help & Troubleshooting] wooddale:
Hey anybody know what that 2.47 radio is it says its for MM the N build or is that for another country.
[Nexus 6P Q&A, Help & Troubleshooting] 341464:
Taiwanese user here. No luck. Have to switch to LTE only and restart the radio.
[Nexus 6P Q&A, Help & Troubleshooting] Olddog828:
Was noticing a lot of 3G after the updated. On Verizon, traditional root, PureNexus ROM and Elemental Kernel. Had to reboot to get it to hit LTE. Finally did a clean install of the ROM and have LTE all the time now (where it's expected).
[Nexus 6P Q&A, Help & Troubleshooting] wooddale:
I'm on Verizon still on 6.0 Pure Nexus 2.15 radio (old one). Having problem but soon as I toogle airplane it immediately grabs 4G and holds sometimes to much I get 4G and 137 db which is no matter internet. It holds on 4G the same as 1X so its just not switching.
[Nexus 6P Q&A, Help & Troubleshooting] elreydenj:
I dont believe it is capable of switching from 3G to LTE on Verizon and vice versa..... Very frustrating
[Nexus 6P Q&A, Help & Troubleshooting] wooddale:
She will do it here with this setup but takes awhile easier to airplane. I'm in a weird area especially for Verizon there aren't a lot of towers to switch to once it locks on to one it holds on good or bad. If I'm in the woods its pretty much 1X when it does switch it grabs 4G from the Highway. This setup s US Cell land so there is very little Verizon 3G.
[Nexus 6P Q&A, Help & Troubleshooting] nadiros:
Have you guys tried the earlier radio? I've had no problems since flashing 01.29. Also I am on Cataclysm with the network quick settings tile set to LTE.
[Nexus 6P Q&A, Help & Troubleshooting] lucky_strike33:
I am on 2.50 and do get the 3g but airplane does the trick. I have gotten the fastest speeds with 2.50 on LTE.
[Nexus 6P Q&A, Help & Troubleshooting] byproxy:
on verizon here and just updated to 6.0.1 (using fastboot... did not do a clean install).

i'm now getting the "R" in my signal bar and it says "extended network" when locked. it never said LTE at my house before... but it also never said R and extended network either.

i've also dropped from near 60mpbs to the mid 40's.

any thoughts?