yashsingh1/xdaforums huggingface dataset:
[Nexus 5 Q&A, Help & Troubleshooting] slal:
I am having issues as well, for about 5 days now.

I am using a Nexus 5, stock Android, on AT&T, in NYC (Manhattan and Brooklyn). Much like others have said, the dropped calls issue only happens on LTE. The workaround, forcing the default mobile network to 3G, does work. But obviously the lack of LTE is a huge problem.

I called AT&T, they are investigating the issue. I also went to an AT&T store and tried a SIM swap / re-registered IMEI. Unfortunately that did not work.

I explained every detail to AT&T to help their engineers find the exact problem. Hopefully a fix is coming soon. I'll post updates to my situation as things change.
[Nexus 5 Q&A, Help & Troubleshooting] subs:
exact same experience...

Have to chime in here . I'm also an infrequent poster. But... Exact same experience. Phone worked great. Nexus 5 on AT&T (nyc).

Last couple of weeks, when I make a call, it rings, if the call connects it drops 3-5 seconds later. I have no problem with inbound calls. The only way I get calls to work: set preferred network type to 3G.

Scratching my head because everything worked fine until recently.

My paranoid theory? The iPhone 5 came out, AT&T tweaked something on their network to support it and it had an effect on a number of other users. Absolutely no theories or proof as to why. But I can't think of anything else that has changed on the last few weeks.

I'm running a stock phone- no root, no ROMs...

If it's a hardware problem with the radio, why do we all have this problem suddenly now? If it's a software problem, did Google issue an OTA update recently?

-Subs

---------- Post added at 11:08 PM ---------- Previous post was at 10:47 PM ----------

Me again.

In another post in this thread I noted i have the same problem.

Another few data points. (No pun intended)

This only happens when the little 'LTE' is displayed next to my network bars. Looking at my network type:

Oddly, with WiFi off, LTE is displayed and as soon as they connect, the phone switches to HSPA and calls drop.

With WiFI on, my cell network is HSPA, calls connect and stay connected.

I'm using the Nework Info II app, and quickly switching to it and doing a refresh to see that the network type is changing.

I'm befuddled with why my WiFi settings matter!
[Nexus 5 Q&A, Help & Troubleshooting] VOLTAGEROCK:
Everyone, try this: Go to mobile networks and choose the 3g only as preferred instead of LTE. After 7 times in a row of dropped calls, I switched to 3g only and it worked without a dropped call.

[Edit]: My mistake for posting this. I should've read the other posts as so many of you suggested this workaround.

Sent from my wondrous Nexus numeral 5
[Nexus 5 Q&A, Help & Troubleshooting] subs:
We (the collective posters) seem to have figured out that works- but we want 4G! :)
[Nexus 5 Q&A, Help & Troubleshooting] VOLTAGEROCK:
I'm with you on that point!!

Sent from my wondrous Nexus numeral 5
[Nexus 5 Q&A, Help & Troubleshooting] hehateme93117:
Hi. Just sharing information about this issue. I live in the East Village and work in the Financial District. I have a stock, unrooted, 32GB Nexus 5 and started experiencing this issue last Saturday. My wife has a Galaxy S3 running CM11 and she's been experiencing this issue too. I switched both to 3G last night after reading this thread.
[Nexus 5 Q&A, Help & Troubleshooting] VOLTAGEROCK:
Are you staying on 3g or changing back to LTE at other times during the day? Because when I switch back LTE I do have successful calls go through but it is so random.

Sent from my wondrous Nexus numeral 5
[Nexus 5 Q&A, Help & Troubleshooting] hehateme93117:
My plan is to stay on 3G until I hear that this is resolved. Before making the change I had successful calls go through too but I wasn't paying attention to what band the phone was on.
[Nexus 5 Q&A, Help & Troubleshooting] undivide:
not an at&t issue, not a hardware issue, definitely software/firmware - wife is fed up with the dropped calls (her phone) so if lollipop doesn't fix this issue I'm selling this device !

I'm so upset that I gave this phone to her as a xmas gift last year.

She was even more upset when she saw me come home with a new G3 the other day!
[Nexus 5 Q&A, Help & Troubleshooting] simms22:
is not a firmware/software issue. my nexus 5 as well as everyone i know with a nexus 5, has a perfectly working nexus 5, that does not drop calls(handing off from lte or any other situation), and all of them are on tmobile, and most are around nyc, including myself. the issue is with your network.
[Nexus 5 Q&A, Help & Troubleshooting] VOLTAGEROCK:
Ok so we are saying that it's an at&t issue then correct? Not the phone at all?

Sent from my wondrous Nexus numeral 5
[Nexus 5 Q&A, Help & Troubleshooting] simms22:
im pretty sure its an issue with att. it can be an issue with the phone and att as well, and how they work together. its just nearly everyone having the issue is on att. and the people that arent on att, theres so few of them that they could be experiencing a similar, but different issue(just same symptoms). i live in Brooklyn, work in Queens, and am on tmobile. i get zero issues with calls getting dropped.
[Nexus 5 Q&A, Help & Troubleshooting] santu9:
Recent google play update.

I along with my couuple of colleagues who uses Nexus were also facing this problem for last 3-4 days. We have a doubt that recent google play update(new material deaign look) screwed up network and causing this problem.
[Nexus 5 Q&A, Help & Troubleshooting] r12ax7:
Possible Related Bug?

I'm with everyone else on here in that when i switch to 3G preferred over LTE all of my calls are fine and when on LTE its more like 90% of my calls immediately drop after connecting. Like others, it started happening a couple weeks ago, so after using 4.4.4 for a while. It seems odd that it initially connects and then suddenly drops out (I havent read the "ianmarmour.com" link yet since its blocked at work so my apologies if that is covered there).

The other thing I noticed at the exact same time that the call drops started is when I start typing a contact in the dialer to make a call there is a 5-10 second lag before my contacts start appearing. If this was purely a radio issue i dont see how the dialer would be impacted; the dialer bug seems more of a software issue. Anyone else have this issue?

Also, when on LTE, the internet speed seems fine and I get text messages. I havent actually benchmarked to see if there is a speed improvement on LTE over 3G which i guess could be somewhat useful - is there an easy app that i can check that with?

Glad I finally found a thread exactly on topic at least! Hopefully the 5.0 update is here next week and fixes this.
[Nexus 5 Q&A, Help & Troubleshooting] jgordon00:
Just want to add my comments. I found this forum through a Google search for "Nexus 5 dropped calls on AT&T". I have the same issue as everyone else. Nexus 5 32GB on AT&T. Calls when on LTE drop after 4-5 seconds. Every time. Filed a Tier-2 support request with AT&T and they are escalating to Tier-3. They told me it could take 72 hours for the case to have any movement.

I would encourage others to call tech support and file a similar case. The more cases they have with the same kind of issue, the better chance that this will be resolved expediently.

:crying:
[Nexus 5 Q&A, Help & Troubleshooting] VOLTAGEROCK:
I'm calling them right now. Are most of us with this problem in NJ or the north east? Who else has this problem and what city do you live in?

Sent from my wondrous Nexus numeral 5
[Nexus 5 Q&A, Help & Troubleshooting] jgordon00:
Yup I'm in NJ and work in NYC.
[Nexus 5 Q&A, Help & Troubleshooting] GrimesNJ:
may have found solution

Hey all, First post here, great forum...I have been having this dropped call problem with my Nexus 5 and also so have my friends and co-workers. I have done the following, and it seems to have worked:

root phone

switch to ART

load the preview of the lollipop dialer

disabled fast dormancy ( i cannot post links yet, as a new member but this is detailed on Ian Armour's website. under "google-nexus-5-fixing-modemcellular-issues-on-34g-networks"

I hope this keeps working.....

P.S. I live in northern NJ and work in Manhattan.
[Nexus 5 Q&A, Help & Troubleshooting] billionsandbillions:
AT&T acknowledges it's their problem

So I got a text message from AT&T tech support regarding my case.

“We have identified your Technical issue. The restoral date is 11/09/2014. If you have questions, call 877-971-5016.”
[Nexus 5 Q&A, Help & Troubleshooting] sammyg122:
Call em and see if they have a legit explanation?

---------- Post added at 06:32 PM ---------- Previous post was at 06:32 PM ----------

Or are they just making you wait like they did on the OPO forums for us
[Nexus 5 Q&A, Help & Troubleshooting] VOLTAGEROCK:
Anytime between today and the 4th of November AT&T will call me back regarding the service ticket. Was on with tech support for 30 minutes. I did a test call with the tech support guy, as i was talking from a landline, from my Nexus 5 and put the phone on speaker and he heard the dropped call! I got lucky that I was able to let him hear what happens.

So now I just wait...

Sent from my wondrous Nexus numeral 5
[Nexus 5 Q&A, Help & Troubleshooting] teamshao:
Glad I found this thread - I have the exact same problem on my Nexus 5 on AT&T in South NJ, right by Philadelphia. I also think it's an AT&T issue - if you connect to WiFi and make the call, you won't have the same problem.

I was in Baltimore for the past three weeks and the problem only just started when I got here to the Philly area, so it always seemed like an AT&T network issue. Hope to see it fixed soon.
[Nexus 5 Q&A, Help & Troubleshooting] buhusky:
Simms,

Does flashing with the latest Android L Preview radio fix the problem? If so, I will take the time to do it but if not then I will just wait and continue my efforts with AT&T.
[Nexus 5 Q&A, Help & Troubleshooting] VOLTAGEROCK:
So we pretty much narrowed this down to nexus 5 phones on at&t regardless if we are rooted with a custom ROM or purely stock living in nj/NY/pa and on 4.4.4 kit Kat?

Out of curiosity though, when did you guys start noticing this problem? For me, it's been about 2 weeks.

Sent from my wondrous Nexus numeral 5
[Nexus 5 Q&A, Help & Troubleshooting] simms22:
i have no idea, im with tmobile. i don't think so, or everybody would be flashing it.
[Nexus 5 Q&A, Help & Troubleshooting] jayr4410:
I have this EXACT SAME issue described above. I travel from Central Jersey (Jackson) to South Jersey (By Atlantic City Airport) and I just started having this issue about 2 weeks ago. As in the original post, if I set Preferred network type to 3G, I have no disconnects. So far, I have only noticed it by AC airport. I have made no changes to my phone. I suspect ATT making change on their end.
[Nexus 5 Q&A, Help & Troubleshooting] clausClapEqn:
Exact Same Problem

Hi all,

I have a 32GB Bright Red Nexus 5, and live in NYC, on the UES. On Monday, I started experiencing this exact same issue. Outgoing calls would drop to H, then connect for 1 or 2 seconds, then immediately drop. I called ATT support, and they suggested going to a store to replace the SIM card with a new one. I did so, and still there was no consistent LTE connection. ATT 'conclusively' told me it was a problem with the phone. I called Google Hardware support (I am still under warranty), and they just sent me a refurbished one the next day (Tuesday). Switching SIM's from my old N5 to the refurb. N5, I had difficulty again connection with a LTE connection, but eventually got a decent connection--until I lost it today. So I called Google again, and they're sending another replacement. Then I decided to check on XDA, knowing if there's a problem, someone here prolly posted about it. Sure enough, here it is, and here I am.

I just did the ART runtime solution, and it doesn't seem to work for me. Hopefully we get enough traction that either Google or ATT notices and fixes things.

***UPDATE: On the phone with Google Support, and they are aware of the problem. ***
[Nexus 5 Q&A, Help & Troubleshooting] trobbs:
Also one plus ones...
[Nexus 5 Q&A, Help & Troubleshooting] billionsandbillions:
read

As I said, AT&T told me November 9 for the fix. So why are we still speculating that the phone settings, or some other nonsense are the issue?
[Nexus 5 Q&A, Help & Troubleshooting] trobbs:
Because other phones are working, so perhaps there is some client side fix that could be implemented. There is obviously something that just a few phones have in common that's aggravating the problem in conjunction with whatever AT&T is doing.

Plus, besides being impatient, AT&T hasn't exactly earned our unquestionable faith.

And it's not like they wrote you back specifically "we are fixing the issue where nexus 5 and other phones drop call after two seconds." it was generic.
[Nexus 5 Q&A, Help & Troubleshooting] javamaniac:
Just wanted to let you know I have a Galaxy S3, and as of about a few weeks ago I've been dropping calls exactly like the first post describes. KitKat 4.4.4. When I'm on LTE it switches to HSPA+ and within about 3 seconds the call is dropped. On 3g the call goes through. In NYC area.
[Nexus 5 Q&A, Help & Troubleshooting] j'vai:
---------- Post added at 04:23 PM ---------- Previous post was at 03:36 PM ----------

[/COLOR]

"..Background to voice-on-LTE

Despite the recent growth of 3G mobile broadband and smartphone appstores, the bulk of cellular industry revenues still come from ordinary telephony. Irrespective of the rapidly-rising volumes of data traffic and the need for more capacity and speed, it is clearly important for operators to retain the ability to deliver a good voice experience, on any new radio network deployment intended for a broad audience.

But unlike previous generations of mobile standards like GSM, LTE does not have dedicated channels for circuit-switched (CS) telephony, instead relying on an end-to-end IP connection from the handset to the core network. Consequently, any form of voice service used on an LTE bearer, by definition, must be some form of VoIP. As far back as 2006 it became obvious that implementing voice telephony was the “elephant in the room” for LTE, but progress on solid and suitable definitions has been glacially-slow. Following a rather panicked flurry of activity, there are now two 3GPP-approved solutions to this problem – VoIMS and CS Fallback - as well as several other non-standardised alternatives..."

http://xdaforums.com/showpost.php?p=52262452&postcount=14

ATT, right?

they are using an ims core to implement their voLTE, & that may be the changes taking place in the background network wise..

guess hspa's IP handover from lte wasn't good enough for the circuit switch, & the wifi's IP channel did it, in supplement..

???

ooh I've YET to make a post here -

http://forums.androidcentral.com/google-nexus-5/453645-drop-calls-nexus-5-att.html

but it's not just the nexus 5, on ATT, nor only an ATT issue when a carrier makes changes on the back end.. -

http://xdaforums.com/showpost.php?p=52262452&postcount=14
[Nexus 5 Q&A, Help & Troubleshooting] cp161803399a:
I have been in contact with AT&T support since around October 23rd when I first noticed problem of calls dropping on my Nexus 5. They said there's a problem with it at my tower and that they would look into it and they gave a resolution day that would be fixed tomorrow now after 2 resolution dates I'm still dropping calls most of the time. I've now been informed when I called AT&T support that the engineers looked at the specs of my device and that is not fully compatible with the att system. They are testing voice over LTE in certain areas but they cannot tell me that they are doing that in my area my guess is they are. I was told for voice over LTE they were using 800 megahertz LTE channel 20 which the Nexus 5 does not have. Therefore we go from a fully functioning phone that works great to a phone that is no longer fully compatible with our system. My assumption is now that AT&T is now going to sell the Nexus 6 which does have LTE channel 20 they don't need to worry about people who have Nexus 5 because they want them to buy the Nexus 6 to have the true straight Android experience.
[Nexus 5 Q&A, Help & Troubleshooting] r12ax7:
Yes, this is the same fix noted on the ianmarmour.com site, i guess we may have to resort to that if they are trying too marginalize Nexus 5 users. I'm trying to avoid rooting as it may disable my secure work email service ("Good for Enterprise", which by the way is terrible).

That date does seem to coincide with the Lollipop release so that is encouraging.
[Nexus 5 Q&A, Help & Troubleshooting] VOLTAGEROCK:
That would truly suck if that's true. Anyway can we get around this with our APN settings??

Sent from my wondrous Nexus numeral 5
[Nexus 5 Q&A, Help & Troubleshooting] j'vai:
actually, google's already working on it in android L's update -

http://forums.androidcentral.com/google-nexus-5/351020-sending-gif-via-sms-mms-3.html#post4009759

because cellular carriers are d*ckz with this IMS thingy -

http://forums.androidcentral.com/google-nexus-5/351020-sending-gif-via-sms-mms-3.html#post4010003
[Nexus 5 Q&A, Help & Troubleshooting] VOLTAGEROCK:
I'm using cyanogenmod on mine right now and it's set up perfect. There's so many extra settings and I use so many of them. I guess I'm gonna have to flash L when it's official.

Sent from my wondrous Nexus numeral 5
[Nexus 5 Q&A, Help & Troubleshooting] j'vai:
if it's *working fine* I wouldn't dare touch nada..

I know the feeling, customizing a debian desktop from scratch, *just the way you like it*, & here comes your isp saying they won't offer you service because you don't run a compatible layered OS (mac or windows).. bs..

I say .. just... wait..

maybe cyanogenmod can script **this in** , (or yourself) after the cake is done, at least after *it's done*, we have human readable source code to look thru.. :)
[Nexus 5 Q&A, Help & Troubleshooting] VOLTAGEROCK:
I meant that it's 'perfect' with everything except this call dropping problem. I just wanted to clarify that in case you didn't read the other posts of mine. :)

Sent from my wondrous Nexus numeral 5
[Nexus 5 Q&A, Help & Troubleshooting] slicetwo:
I found this thread through Google. I'm on a Galaxy s3 and having the same issues. I'm right outside of Philadelphia. Glad to know it's not just me.
[Nexus 5 Q&A, Help & Troubleshooting] wchesterpa:
It's just Philadelphia area (at least for me)

I first noticed the issue a week ago, on the 23rd. I work few days a week in Manhattan but live outside of Philly.

No issues all day in lower Manhattan. On Amtrak on the way home, I started dropping calls after Trenton. By the way, trying to trouble shoot the issue I moved my SIM to my old Galaxy S3 and didn't have any problems. Today, I headed to Boston and turned LTE back on and haven't had a single problem.

In my mind that points to this being an AT&T issue and not something deliberate. I had arranged to replace my Nexus 5 under warranty but now not going to do it. Luckily for me I'll be out of the country for the next week so won't have to deal with it and by the time I come back, hopefully this will be resolved.
[Nexus 5 Q&A, Help & Troubleshooting] jgordon00:
I decided to issue a complaint with both the FCC and FTC today and would suggest others do this as well to put pressure on AT&T:

FCC:

https://esupport.fcc.gov/ccmsforms/form2000.action?form_type=2000B

FTC:

https://www.ftccomplaintassistant.gov/GettingStarted?NextQID=249&Url=%23%26panel1-5#crnt
[Nexus 5 Q&A, Help & Troubleshooting] Raistlin1:
I just had this happen to me yesterday, went to make a phone call and when the person answered the call dropped. Went to call again and it rang maybe once and then it dropped again. Used my wife's S4 and call went through, both of us are on AT&T. Pretty sure both of us were originally on a LTE signal when the calls were made as well.

I don't think I have ever had a call drop since I switched to AT&T, and frankly I am not even sure I had a call drop when I was on Sprint using the N5. Can't wait for this update to drop, can't be soon enough.
[Nexus 5 Q&A, Help & Troubleshooting] VOLTAGEROCK:
I'm hoping it's just att fixing something on their end, not an update. I don't want to flash L yet. This really sucks. We need att to read this forum. I'm gonna tell them about it when they return my service ticket call from when I reported this issue to them this past week.

Sent from my wondrous Nexus numeral 5
[Nexus 5 Q&A, Help & Troubleshooting] chris-s-g:
Thanks for the link!

Thanks. I filed a complaint with the FCC via the link you provided. AT&T basically told me that it was not a problem as far as they were concerned, that it was simply a risk I had to be willing to assume when purchasing a phone from someone other then them. Wait a minute, wasn't that monopoly broken up years ago???
[Nexus 5 Q&A, Help & Troubleshooting] VOLTAGEROCK:
Everyone here needs to remember that this problem just started like 2 weeks ago.

It is not our device. It's AT&T. And the fact that so many people reporting this issue and AT&T saying they know nothing about it is really making me consider switching back to Verizon. My 2 year contract is up so if this isn't resolved soon, I'm out.

Only problem is, does the GSM Nexus 5 work with CDMA? Does it have a dual band option built in? Or would I have to buy a CDMA N5?

Sent from my wondrous Nexus numeral 5
[Nexus 5 Q&A, Help & Troubleshooting] simms22:
nexus 5 does not work with verizon. yes, its possible to connect to verizons lte, and receive data, which you can use the hangouts dialer and your google voice number on. but you will not be able to make regular phone calls with your regular number. verizon does not support the nexus 5.
[Nexus 5 Q&A, Help & Troubleshooting] cp161803399a:
I now question how correct the support person can be in stating that it was 800 megahertz which would be LTE band 20 since aT&T does not use that band from what I can see. In any case aT&T has changed something or is testing something in southeastern PA.
[Nexus 5 Q&A, Help & Troubleshooting] Syndrome666:
Don't think it's the absence of at&t's band 20 doing this, my girlfriend's and my old iPhone 5 phones, which only have lte bands 4 & 17, never have issues with dropped calls, and mind you both models were purchased from at&t back in 2012. So this clearly isn't an issue with lte band 20. Nexus 5 has more cell bands than any other android phone and most unlocked iPhones. It's definitely something on at&t's end, and no one seems to be able to pin point the cause of the problem. I've went to my local at&t store in Staten Island (NYC) and spoke to a couple of sales reps who both own the N5 phones, and they too are experiencing this issue as of early and mid October. They did say that at&t is aware of this issue and will hopefully fix it asap. At this point we might as well just wait and see if lollipop update fixes this call drop problem. Lots of at&t phones do not have lte band 20 and have no problems keeping calls active 100% of the time. There should be no reason that a phone like the N5 should be having problems of this sort. Funny thing is, the world version of N5 (model D821) does in fact have lte band 20, curious if anyone with a D821 Nexus 5 can relate to this, probably not, since it's stupid owning one in north America, but still just throwing this question to anyone possibly owning and testing this with N5 D821 on at&t.
[Nexus 5 Q&A, Help & Troubleshooting] exorz:
I just changed over from tmo to att about 2 weeks ago and have been experiencing the same thing. I've seen this happen in south eastern PA and north Jersey and Manhattan. If I am in LTE mode when the call starts it switches to H (no problems), but after connecting it goes to zero bars and immediately comes back to LTE. This happens when people call and I don't even see a missed call. I've tried updating my radio to KTU84Q and LPX13D (L Preview) with the same thing happening. The dropped call isnt 100% either. Sometimes it'll connect and stay connected.

edit: Also if I set it to 3g or lower I will have no problems with the calls connecting/dropping.