yashsingh1/xdaforums huggingface dataset:
[Nexus 5 Q&A, Help & Troubleshooting] slicetwo:
It's working on my stock GS3 in Philadelphia. It wasn't working on CM11
[Nexus 5 Q&A, Help & Troubleshooting] a940600:
FYI stock should have been working all this time at least from the s3. Whenever I went back to stock, I had all calling ability. The problem only arose when I went to a 4.3 or 4.4 custom ROM.
[Nexus 5 Q&A, Help & Troubleshooting] Raistlin1:
I still had the issue yesterday morning but then I installed the 5.0 update and issue went away, as we all suspected it would on lollipop.
[Nexus 5 Q&A, Help & Troubleshooting] nh5:
I upgraded my Modem to the LRX21O release one and the problem appears to be gone (Unless ATT fixed it in the mean time). I'm still on CM11. From the looks of it, whenever a call is dialed or received now LTE is turned off for the duration of the call.
[Nexus 5 Q&A, Help & Troubleshooting] cmplaya:
installed lollipop rom and issue fixed in manhattan for me
[Nexus 5 Q&A, Help & Troubleshooting] VOLTAGEROCK:
I had one dropped call yesterday 10 minutes into the conversation but the rest of the 12 or so calls that I made had no problems.

Sent from my wondrous Nexus numeral 5
[Nexus 5 Q&A, Help & Troubleshooting] AliAhsan:
I am from Pakistan still facing this issue. I am on Android 5 stock ROM. It has improved but not fixed. We have 2g and 3g network in Pakistan.

If I insert 2g SIM no call drop what so ever. But when I have 3g Network SIM all of sudden Call drops and all sort of these issue.

More info when I am driving in town call drops more when switching between BTS .
[Nexus 5 Q&A, Help & Troubleshooting] redrim:
Any update or potential workaround for this?

"It looks like "D820 cannot work on B20 (HW is different)" as per http://xdaforums.com/google-nexus-5/general/radio-enable-lte-band-3-nexus-5-d820-t2928561
[Nexus 5 Q&A, Help & Troubleshooting] undivide:
did a quick test after flashing the factory image to my wife's N5 via flash all script. seems to hold the call up pretty well just coming to and from my cell at our house. don't think she made ANY phone calls yesterday (of course) right after I upgrade ! bah
[Nexus 5 Q&A, Help & Troubleshooting] VOLTAGEROCK:
How come some people here are flashing new things to their phone when AT&T supposedly fix the problem without us having to do anything? I have cm11 and its working 90% of the time without dropping calls after the fix. That's much better than 0%.

Sent from my wondrous Nexus numeral 5
[Nexus 5 Q&A, Help & Troubleshooting] undivide:
because we didn't want to wait for OTA ???
[Nexus 5 Q&A, Help & Troubleshooting] VOLTAGEROCK:
I was under the impression from all of these posts that whatever anyone tried from replacing their phones to factory resets to new ROMs didn't help at all.

Sent from my wondrous Nexus numeral 5
[Nexus 5 Q&A, Help & Troubleshooting] scales11:
Seems fixed now. On my gs3 (cm11)
[Nexus 5 Q&A, Help & Troubleshooting] jettinvr6sc:
Still having some dropped calls. Out on Long Island. Still better than all the time.
[Nexus 5 Q&A, Help & Troubleshooting] VOLTAGEROCK:
Well I guess we are back at square one again. I just had about 6 dropped calls while on LTE. They started 15 minutes before I got to the Wayne New Jersey area coming from the east. So basically I was driving from New York City towards the west and right when I got to a certain point every single call dropped until I switched back to 3G. So here we go again...

Sent from my wondrous Nexus numeral 5
[Nexus 5 Q&A, Help & Troubleshooting] art-silenkov:
So whats a status of this annoying bug?

- is it operator related or just android?

- is lollipop fixed it (or may be make it better)?

Im on YOTA network in Russia and have to switch over 3g every time when making calls. No phone modifications were supposed to fix the issue. Tried different ROMs (honestly all available) they still have this bug all. My OP says nothing useful neither fix it for me for few months.

I'm on business trip now and sadly don't have access to LTE network. But have my phone updated to lollipop yesterday. I'm eager to know whether my calls could be successful now without 3g switching ))
[Nexus 5 Q&A, Help & Troubleshooting] VOLTAGEROCK:
Is anyone else having this problem again? All of a sudden all of my calls are dropping again on LTE.

Sent from my wondrous Nexus numeral 5
[Nexus 5 Q&A, Help & Troubleshooting] a940600:
I thought it was only me. I faced it a couple of times in central jersey.
[Nexus 5 Q&A, Help & Troubleshooting] MrObvious:
I wonder if AT&T is just having problems? I'm on Cricket and get horrible download speeds.
[Nexus 5 Q&A, Help & Troubleshooting] jettinvr6sc:
I was in city all day, no problems. I was working by 5th & 55th
[Nexus 5 Q&A, Help & Troubleshooting] art-silenkov:
Gladly Lollipop almost fixed this issue for me. Now my Nexus doesn't drop carrier when voice call arrive. It switches to 3G or even 2G when bad signal.

"Almost" means that switching is not quite perfect. After voice call phone drops all mobile data connection and then reconnects for 3-10 seconds. It looks like exclamation mark near the antenna picture.

No internet is available during this stage. Not bad. At this time I'm still available for voice calls. It used to drop all carrier before. Happily now things are changed.

Well, switching of bands now doesn't break availability in total but feel luggish.

BTW when no LTE network is available and phone have "LTE Preferred" in settings - there is no network at all. I want my phone to fall back to available band in such a case, without manual intervention to settings.
[Nexus 5 Q&A, Help & Troubleshooting] nsiti:
Dropped calls problem is back for me, AT&T, in NYC, on SGS4, GPE.
[Nexus 5 Q&A, Help & Troubleshooting] a940600:
I'm with you on that. I thought I was the only one having it happen in central Jersey. Also having this weird problem where the call seems to get answered and dropped. Not sure if its related or not to this .
[Nexus 5 Q&A, Help & Troubleshooting] VOLTAGEROCK:
Yup, it was fine for about a week, and now it's a 50/50 chance that the call will drop. This us so frustrating.

Sent from my wondrous Nexus numeral 5
[Nexus 5 Q&A, Help & Troubleshooting] fincan:
Same thing in Northern Virginia / Washington DC area with SGS4 GPE, started to happen past week or so.
[Nexus 5 Q&A, Help & Troubleshooting] sterlinggold:
Northern VA, Nexus 5 rooted Kitkat, consistently drops calls for the past two days. replaced SIM but did not help. only setting 3G as proffered network fixes it. Any idea what's behind this?
[Nexus 5 Q&A, Help & Troubleshooting] multimedialeech:
Just started happening to me in/ around Baltimore MD a day or two ago. So far my solution has been to use WIFI everywhere and turn off LTE, annoying, but less annoying than the dropped calls. Just waiting and hoping for some kinda fix to this issue.

Nexus 5 with SlimKat (4.4.4)
[Nexus 5 Q&A, Help & Troubleshooting] fincan:
AT&T is testing/rolling Voice Over LTE (VoLTE) in some markets, seems to be the east coast, and they are not configuring their towers for the unlocked/non-AT&T phones properly, causing call drops when placing or receiving a call while under LTE signal. Normally our phones (Nexus 5, Galaxy S4 GPE, One Plus One, etc.) should downgrade to 3G/HSPA while having a phone a call, but this switch-over is not happening properly due to misconfiguration on the AT&T end. This is why if you force your phone to 3G, it works fine.

Their official response is "we don't support non AT&T branded phones, sucks to be you". Eventually they will fix this, but no one knows when.

TL; DR, AT&T is full of idiots.
[Nexus 5 Q&A, Help & Troubleshooting] undivide:
If you feel the need to ditch your N5 phones as my wife has contemplated- at&t are doing promos on certain days for when you buy a phone on the next program you get 100 dollar bill credit. they were doing this with a refurb G3 and are now doing it with a new G2- trying to clean out inventory =-)
[Nexus 5 Q&A, Help & Troubleshooting] PhilipTD:
I changed my APN to pta yesterday and LTE speed increased dramatically. Before 0.2 - 0.8, after 3 - 10 Mbps in Midtown. Great, but the dropped-call problem came back. I don't know if it's because I changed the APN or if it's just a coincidence. I noticed that the drop occurs upon the switch back to LTE from 3g. (The phone automatically switches to 3g on incoming and outgoing calls.) So I made a profile in Tasker that turns data off whenever a call is placed or received and turns it back on when I hang up. Because I'm an amateur at Tasker and don't know much about how the radio works, 3g reconnects immediately after LTE is switched off by the profile but doesn't cause the call to drop, which turns out to be handy, because I maintain internet connectivity during the call. The second profile which turns data back on when I hang up reestablishes the LTE connection.
[Nexus 5 Q&A, Help & Troubleshooting] multimedialeech:
Turned LTE back on and wifi off and so far no dropped calls, I am remaining cautious optimistic that the problem is over.
[Nexus 5 Q&A, Help & Troubleshooting] VOLTAGEROCK:
Yeah it seems like our phones are working like they're supposed to again. I guess that's why we haven't seen that many replies to this post anymore.

You couldn't have worded it better: cautious optimistic!

Sent from my wondrous Nexus numeral 5
[Nexus 5 Q&A, Help & Troubleshooting] anactoraaron:
Yeah but I ended up flashing back to 4.4.4. In my case two of my favorite games didn't work (ff3&5) and since I play them all the time the Dev preview wasn't for me (not that it ever was for me anyway).

Three things that I miss from 5.0. 1- LTE issues were fixed. 2. Lock screen notifications. 3. Battery saver mode.
[Nexus 5 Q&A, Help & Troubleshooting] simms22:
something i completely forgot about..! i flashed the radio that was included in the latest L preview release, onto kitkat,, and i swear that i havent had this solid a connection beforehand. it could be worth a try for both of you, just flashing the new radio https://www.androidfilehost.com/?fid=95747613655047015
[Nexus 5 Q&A, Help & Troubleshooting] Rednutinc:
I've followed XDA for most of my needs but this one makes me want to post.

I am on AT&T, and have been for several months, with no issues with my N5(wife has one too) Within the past two weeks we both have experienced dropped calls. In the past 3 days we couldn't make or receive calls. I called AT&t and google and have done everything from cache clearing, to the network being reset on my account, and nothing. But I tried setting myh network to 3g, and bam.... dropped calls gone. When it was on LTE I watched the notification bar switch from LTE to Hspa and once the call was picked up, anywhere from immediate to about 4 seconds it would drop... every time. But when I switched it to the 3g, it has no issues at all. Neither AT&T or Google could figure out why.

Guess I wait till 5.0 comes out next week and hope that helps.

---------- Post added at 10:03 PM ---------- Previous post was at 09:25 PM ----------

I am most curious about is the location... how did you find out it was throughout that location? I only ask because I am in the the middle of eastern PA, right in the corridor between Philly and NY.

Its comments like this that make me question the radio being the issue and ATT being part cause. If we werent having this issue a month ago, why now? Did google update anything recently? Or did ATT update and the current way our radio functions just not work with that update... especially if this is only a localized issue from Philly to NY. I am happy to hear that people seem to have success with 5.0 or the other person that just updated the radio.

So is both ATT and Google at fault? The N5 radio could have been better it seems, but it also seems that ATT might have done something on their end that is incompatible with our current radio. I don't know for sure. And after talking with ATT and Google for about 2 hours each these past two days, neither has a clue or admits its their fault.
[Nexus 5 Q&A, Help & Troubleshooting] simms22:
well, so far we know that both of you are on att. im in nyc, on tmobile, without this issue, nor had any issue switching from lte to H during phone calls.
[Nexus 5 Q&A, Help & Troubleshooting] Syndrome666:
possible fix

Okay, so I'm back, also on At&T in NYC by the way. Don't think this is the issue, however, i finally was about to flash lollipop, but then remembered that it runs android run time exclusively, so instead i just switched my current 4.4.4 KitKat's runtime to ART. So far 2 days on this runtime and not a single dropped call with LTE set as the preferred network. So try thus out before you mod anything. So far so good on my N5. Only thing is a few apps may still not be optimized to run on ART, all of my apps work except for plants vs zombies and random heroes, not sure about the devs of plants vs zombies, but the devs of random heroes are working on having their apps optimized for ART. So this bug may very well have something to do with dalvik runtime and the phone app plus the cellular modem.
[Nexus 5 Q&A, Help & Troubleshooting] Rednutinc:
OK.... While I'm understanding what you said it's something I've never looked at doing... How'd you go about doing that? The 5.0 radio update may be an easier route.. Not sure. I'm not jumping the gun till I settle on which I want to try. Mainly because they're usually more than 1 or 2 ways to do something as we just found out. But I appreciate you giving it test run and im glad it works. More choices are always good.
[Nexus 5 Q&A, Help & Troubleshooting] Syndrome666:
It's an option inside developer settings. First you need to unlock this hidden setting by simply going into settings, scroll all the way to the bottom and go into "about phone" (last option), in here scroll all the way to the bottom, and tap on build number several times fast until it says "you are now a developer". Now hit the back button and you should see a new section right above " about phone " titled "{} developer options", press on it and under 4th line from the top, you'll see an option "select runtime", switch it from dalvik to ART. This process will take several minutes since the OS has to optimize everything to run ahead of time. That's it. Try it out, hopefully it'll work for everyone.
[Nexus 5 Q&A, Help & Troubleshooting] Rednutinc:
OK Simms.... Your opinion- flash the radio, select ART... Or maybe both? Or.. Do I just deal with it for another week since 5.0 should be out soon? I don't get LTE everywhere anyhow so I've dealt with hspa. I use Wi-Fi at home and work.. Decisions... Decisions
[Nexus 5 Q&A, Help & Troubleshooting] anactoraaron:
I'm on T-Mo also but have the issue using the latest radio - it shows -0 dbm and 96592874937 asu (or some absurd number like that) on LTE in my basement. I never changed the radio when I restored my 4.4.4 nandroid from the 5.0 dev preview so I'm still on the most current radio. I'm going to try out switching to ART and report back. It's worth a shot.

EDIT: Still does it on ART with stock 4.4.4. Back to davlik...
[Nexus 5 Q&A, Help & Troubleshooting] simms22:
flash the radio, reboot, and use until the first occurrence. then try switching to art(will take 5-20 minutes to boot depending on apps. first time only). btw, how are your lte data speeds, hspa data speeds? anyways, you might like art as well :)

---------- Post added at 09:46 PM ---------- Previous post was at 09:43 PM ----------

flash the 444 radio.

thats odd, of all the n5 radios out there, this latest L radio is the only one where data speeds dont fluctuate greatly mid stream.
[Nexus 5 Q&A, Help & Troubleshooting] Syndrome666:
Try flashing a fresh install of 4.4.4 without nandroid, it's very likely nandroid backs up all the problems as well, so a fresh OS install may be an option for you. Just backup only the app data that you need, don't backup settings as the problem may very well be within the settings. Someone did mention that a fresh factory os install fixed their device. Not on this forum though, but was also on an N5. You're problem sounds way more severe than what the op and myself are experiencing. Our devices have full reception, just that occasionally when in a phone call, LTE service drops to 0 bars for a split second while attempting to switch to H+ network and that causes dropped calls, it doesn't happen every time either, but it's enough to consider unacceptable for a mobile device on a stable network. Flashing deferent radios is not the best option for everyone either, in fact I'd go in this process of elimination, try ART on KitKat first, if that doesn't work, then try lollipop, and if that is not the solution, then try doing a fresh factory 4.4.4 KitKat install, if that fails, only then mess with the radios. If everything fails then either wait for the official lollipop update, or have your device replaced. Hopefully something works out for you. It's annoying to have to replace the device, but that's the last case scenario. So try a fresh factory install of 4.4.4, since that's the only thing you haven't tried, or have you?
[Nexus 5 Q&A, Help & Troubleshooting] anactoraaron:
Actually it's done this since the initial KK release - full stock even. I got my N5 the Tuesday after the release (I'm one of the lucky ones lol). I didn't even know something was wrong until I started getting phone calls like "why didn't you answer earlier" and texts like "didn't you get my text?" It's weird, it's like the phone isn't able to accept an LTE connection at worse than -115dbm even though this is possible - I can stay on LTE with the 5.0 dev preview even at -123dbm and worse without a problem. I know it's not the radio (I've used every one and the newest 5.0 radio is the best of them all), It's not the hardware (works fine on 5.0), so it has to be something in KK that causes this issue for this device (the wife's M8 is fine on KK getting LTE at worse than -115dbm). Perhaps the N5 can't distinguish LTE from UTMS in 4.4? Again, I'm no expert, but I don't think it's possible to be connected at -115dbm or worse on UTMS/3G/HSPA...? If there's a software limit for signal strength written in perhaps the wrong value was put in for LTE? (the same -115dbm for UTMS was copied over to LTE by mistake?)

I am assuming that there is something in the OS that regulates when there is a need to switch network modes? Perhaps there's two sources... one in estimated signal strength (the estimate from what the OS reports from the radio) and another in the actual connection state (in the hardware - the radio knows when it's got a connection ie: connection state valid or unvalid. Or it's simple as connection state 1 or 0). Perhaps the radio is saying "I'm connected" and the software is saying "approximate signal strength is worse than -115dbm time to switch" and it's not switching (or it is unable to) because the radio has to say "I'm not connected" or "Connection state = 0" first in order for the switch to 3G to occur. It would explain why I get stuck at -0. The OS isn't able to accept a signal strength of worse than -115dbm and when it happens it (the OS) is expecting the radio to not be connected anymore (and needs it to be in order to switch as it's set to LTE preferred) and since the radio can still connect to LTE I get the issue that I get - what I call the "stuck in the prepare to switch network mode bug"... just my guess anyways.

Here's a screenshot of what it looks like. When it does this, I can't get any phone calls, texts, data, etc. The phone just becomes a music player :P ..until I switch to 3G preferred anyway. Anyway, it didn't do this on 5.0 when I tried it out and I've dealt with this for almost a year now, waiting 2 more weeks isn't going to bother me at all. Hopefully all my apps will get updated so they all work on 5.0 by then :)
[Nexus 5 Q&A, Help & Troubleshooting] greeneyez15o:
Thi is getting annoying
[Nexus 5 Q&A, Help & Troubleshooting] simms22:
after you posted last night, i checked mine while i was in the basement of my building, and even though i still had my lte signal(while you completely lost your signal), mine looks exactly like yours. yet, i do not have this issue..
[Nexus 5 Q&A, Help & Troubleshooting] anactoraaron:
The weird thing is that I don't lose my LTE signal at all on the 5.0 preview anywhere in my house - so I'm baffled by this behavior with my phone in KK. Actually I was rather shocked & impressed by how well I could get LTE signal on 5.0. I guess a quick flash-all.sh to 100% 4.4.4 wouldn't hurt any... Only changes to stock for me is root, recovery, and kernel. I don't even have that many apps. I'll check and report back.
[Nexus 5 Q&A, Help & Troubleshooting] Syndrome666:
You know something, you might be right, never took note that the signal cuts out when dropping below -115dbm. I noticed mine doing that in my basement whenever the signal strength would hit below -115dbm it works result in 0dbm momentarily. Still haven't experienced any call drops while on ART. I'd love to try lollipop, but I'm just in no mood to shuffle files around before ding a fresh install. Did you notice if LTE is able to drop below -115dbm on lollipop without cutting out signal?
[Nexus 5 Q&A, Help & Troubleshooting] jgr208:
I know that since I travel on nj transit between Philly where I live to NYC some weekends and it keeps happening along the route and as well when I am in NYC.
[Nexus 5 Q&A, Help & Troubleshooting] buhusky:
I also live in the Eastern PA region and both my wife and I have Nexus 5 devices on AT&T (more Philly to Lancaster area). We have been experiencing dropped calls also. It is within the first 3 seconds of a call connecting when LTE is enabled. Switching LTE to 3G fixes the problem but is unacceptable. I have a ticket in with AT&T and already talked to Google but they weren't much help. I'll post back if AT&T is able to resolve the issue since it seems like something with their network.
[Nexus 5 Q&A, Help & Troubleshooting] Rednutinc:
did a test in 2 different locations and had LTE at 9.33 and 5.64 and HSPA was 6.52 and 1.67

I am on WiFi at home, and my wife can run Wifi at work and home, and most of the places we visit have it so I was worried most about the calls right now. I might just wait another week and see if the 5.0 update rolls out. I can deal with the 6.52 speed on HSPA right now when I am out and about and need it.
[Nexus 5 Q&A, Help & Troubleshooting] cmplaya:
same problem

i'm on att with nexus 5 in NYC. just started having the same call drop where reception goes to zero and then back normal right after they pick up and the call drops

i've had the phone since release day last year and problem just started happening three days ago though on Saturday

for now only thing that seems to work is switch to 3G and turn LTE off
[Nexus 5 Q&A, Help & Troubleshooting] greeneyez15o:
Called at&t and absolutely no help ! ! !
[Nexus 5 Q&A, Help & Troubleshooting] jettinvr6sc:
I'm also having the same issue. N5 on PA, started happening about a week or so ago. I live on Long Island and work in NYC. I switch to 3G and no issues.
[Nexus 5 Q&A, Help & Troubleshooting] billionsandbillions:
same

N5 on AT&T, in Brooklyn. Android 4.4.4

The phone drops all incoming and outgoing calls after a couple seconds. Problems started monday. Switching to 3G fixes it.

Google asks me to make sure I have a sim card in the phone... AT&T says they've never heard of this problem...

My iPhone 5s on the same account and network has no issues.
[Nexus 5 Q&A, Help & Troubleshooting] greeneyez15o:
Yea i thought it was the sim card too so i put it back in my s4active, no dropped calls anymore. But i like my N5 more !
[Nexus 5 Q&A, Help & Troubleshooting] MrObvious:
Does the Android L preview radio from this month help?
[Nexus 5 Q&A, Help & Troubleshooting] simms22:
i suggested that they try it already.
[Nexus 5 Q&A, Help & Troubleshooting] trobbs:
FYI, this is happening to Oneplus one owners too. Same symptoms. See here: http://xdaforums.com/oneplus-one/help/dropped-calls-weak-lte-signal-t2916659

Happened to me on both N5 and OPO on the same day, in NYC, on AT&T.
[Nexus 5 Q&A, Help & Troubleshooting] simms22:
so it seems as its an issue with att's network, switching from lte to a phonecall. i know a person said he was with tmo, but it seems that everyone else is with att. and in the oppo thread as well.