Problem #1 My phone often shows an exclamation point and no data. When I toggle airplane mode it usually fixes it instantly.
Problem #2 In a few particular areas I get LTE but can't make calls when using Verizon mvnos. With my previous phones it was the opposite- I could call but no data. It's been confirmed with providers that there's voice in those areas.
I've used various mvnos, radios, and ROMs. I even sent my device in for warranty. I know it's at least partly due to the poor service area, but I didn't have these issues with my Nexus 4 or galaxy phones.
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I do get good 4G coverage from VZW most of the places I go. But the fact that the coverage is not 100% makes it useless for real-time application. This morning I was on a conference call using Skype dialing a regular phone number. In 30 minutes the call dropped twice, both due to I drove through a spot with no 4G coverage. As the phone switched from 4G to 3G the Skype connection was cut momentarily and the call dropped. On my OG Droid X on 3G this rarely happens.
I wish the phone handles switching from 4G to 3G more gracefully. Now I'll have to remember to turn off 4G when I start a Skype call. Quite annoying.
Any idea how to fix/workaround this?
This and failed text messages are the reason I left Verizon. ATT's 4G LTE is much boarder in cities and when you leave LTE areas then you fall back to HSPA+.
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to each his own...
I have phones on AT&T and Verizon Wireless networks (one for work and one for play). I've consistently had better phone experience in the DFW areas as well as places I've traveled to on both coasts.
Consumer Reports article about AT&T being lowest in customer satisfaction.
Well sprints is great.
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saccityp said:
Well sprints is great.
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Except for almost the whole US except for a couple states has 3G.
I have a Blackberry on AT&T for work and the S3 and a Razr Maxx on Verizon.
In Dallas, there is no comparison that Verizon is better- never a dropped call, and data reliability is outstanding compared to AT&T.
I've had AT&T since before they existed as AT&T and their analog, GSM, Edge, 3G have never held up well in either voice or data in my 10-11 year's of experience with them in the DFW market.
luckily I live in an area were I always have 4g
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saccityp said:
Well sprints is great.
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Sprint's WiMax also unfortunately had this issue. The reason was because when your phone switches from 4G to 3G, your IP address changes thus ending any active connections. This was especially bad for WiMax since it was on 2.4Ghz making it have very spotty coverage.
I'm not sure if it's possible to retain the IP from a switch or if Sprint does this with their LTE network.
In my area, VZW is only LTE and has better signal than any others... guess I don't have any choice...
I love Verizon's Service. LTE is on point here in Orange County CA and I get consistently better service than anyone without it. My only concern is with the phone itself. It keeps freezing on the data side once to twice a day. I just have to turn off and then turn on mobile data to get it to work.
Thanks for all the info about coverage of different carriers. The point of my post/question though, is that when there's not a 100% 4G coverage, the data connection is disrupted when you switch from 4G to 3G, causing trouble in any application that requires a stable data connection.
Seems even if the 4G coverage is not 100%, there should be a better way of handling switching to 3G such that it doesn't drop data completely.
simollie said:
Thanks for all the info about coverage of different carriers. The point of my post/question though, is that when there's not a 100% 4G coverage, the data connection is disrupted when you switch from 4G to 3G, causing trouble in any application that requires a stable data connection.
Seems even if the 4G coverage is not 100%, there should be a better way of handling switching to 3G such that it doesn't drop data completely.
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There's nothing you can do about it but the carriers can fix it.
The solution would be to keep the same IP address when switching from 3G to 4G. The reason video calls in skype, browser downloads, and other things stop is because the IP address changes when switching. If the same IP address was kept from the switch, that wouldn't happen.
One thing that carriers could do when connecting to 4G is: Have your phone connect to both 3G and 4G at the same time and then request the same IP for 4G that you had on 3G. Then it can switch to 4G and switch off the 3G connection thus retaining the same IP and leading to no interruptions. All of this would happen in probably less than a second. The same thing can be done for switching from 4G to 3G.
I don't see why carriers can't/don't do this. Either they haven't thought to implement it, or there is some other reason that would make this impractical.
Hey everyone. I notice that my GS4 (AT&T I337) turns off LTE during phone calls and falls back to GSM/UMTS/HSPA+. Since the modem on the GS4 is integrated GSM/LTE, this makes sense from a technical standpoint as a power saving feature. You can't do voice over LTE, so falling back to GSM seems logical, but couldn't they just route voice over GSM while leaving data on LTE? Do the I9505 or M919 models exhibit this same behavior or is this unique to the I337 model?
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Yep its normal. Voice over lte isn't implemented yet. Not unique to gs4. HTC one and one X and iphone5 all do the same thing.
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Galaxy S3 does the same thing. Therefore it's not unique with Galaxy S4. I'm also certain that it does the same thing on other devices as well on at&t.
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Figured as much. Thanks guys!
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It's strange that the CDMA models can keep LTE during a call but the GSM models can't. Or, at least, I know the Verizon S3 does. On the old Verizon LTE phones like the Thunderbolt or Galaxy Nexus, it makes sense that it could hold on to LTE on a call since those had separate LTE and CDMA modems. I'm pretty sure that the Verizon S3 was the first Verizon LTE phone to feature an integrated CDMA/LTE modem, so obviously there must be other reasons to explain why an integrated CDMA/LTE modem can stay on LTE during a call but a GSM/LTE modem can't.
Honestly, a GSM/LTE modem probably CAN route voice through GSM while using LTE for data, but they don't because they dont have to. Since it isn't necessary, they just take the power savings and shut off LTE. On an GSM phone, at least 3G supports simultaneous voice and data on UMTS or HSPA+. On CDMA, simultaneous voice/data isn't supported on 3G EV-DO, so LTE would be the only simultaneous voice/data option, power savings be damned.
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Thread moved to Q&A
Let's get some technical facts in this thread (btw, this is the third time I've posted this on XDA....)
The LTE standard only supports packet switching with its all-IP network. Voice calls in GSM, UMTS and CDMA2000 are circuit switched, so with the adoption of LTE, carriers will have to re-engineer their voice call network. Three different approaches sprang up. Most major backers of LTE preferred and promoted VoLTE (Voice over LTE, an implementation of IP Multimedia Subsystem or IMS) from the beginning. The lack of software support in initial LTE devices as well as core network devices however led to a number of carriers promoting VoLGA (Voice over LTE Generic Access) as an interim solution.[13] The idea was to use the same principles as GAN (Generic Access Network, also known as UMA or Unlicensed Mobile Access), which defines the protocols through which a mobile handset can perform voice calls over a customer's private Internet connection, usually over wireless LAN. VoLGA however never gained much support, because VoLTE (IMS) promises much more flexible services, albeit at the cost of having to upgrade the entire voice call infrastructure. While the industry has seemingly standardized on VoLTE for the future, the demand for voice calls today has led LTE carriers to introduce CSFB (Circuit Switched Fallback) as a stopgap measure. When placing or receiving a voice call, LTE handsets will fall back to old 2G or 3G networks for the duration of the call.
Source
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This explains things perfectly. Thank you!
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KryptosXLayer2 said:
Let's get some technical facts in this thread (btw, this is the third time I've posted this on XDA....)
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So reading this again, I would assume Verizon uses VoLGA since it seems that is the one that allows the handset to remain on kTE During voice calls. By the same logic, AT&T must use CSFB?
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My understanding was on Verizon network you stay connected to the CDMA network all the time and connect to LTD in addition (when available) effectively using 2 different radios. With AT&T and T-mobile since everything is GMS based it is more scaling and if you connect to LTD you effectively disconnect from WCDMA until of course you make or receive a call then you fall back to WCDMA. It is more battery efficient then running 2 radios constantly. That's just the way I understand it. I could be wrong
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Basically I have tried stock reset using LG Flashing tool i have rooted and tried numerous roms, but the problem is i boot my phone it has 4gLTE full then 5 minutes in it switches to 3g network. I have called verizon and tried everything they told me. Also i have even tried and made sure it was on the correct network which is Global or CDMA/LTE
I wanted to know if any deveopler can help me here to figure out the issue with why its not staying connected to 4g?
One of two things. There is issues with the towers around u which would be a Verizon problem. Or its hardware related
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Esteway.619 said:
One of two things. There is issues with the towers around u which would be a Verizon problem. Or its hardware related
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its sounding like its hardware related before i upgraded to the LG g2 i had .. i even dialed *228 to locate towers my area is all red on 4glte and im right next to the tower
can someone please help me with this issue it is irritating me very much because i pay for 4glte not 3g ****
so no update on this no one having the same issues as me loosing 4glte and connecting to 3g
Have you tried a new SIM card? On some LTE devices dialing *228 can actually screw up the SIM data. You should try a new card.
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Have you tried any of the different radios / modems? Might be worth a shot.
richielasalsa said:
so no update on this no one having the same issues as me loosing 4glte and connecting to 3g
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Just got my G2 a couple days ago and I can confirm that I am having the same issue. I haven't found any fixes yet. It does seem that as long as I am actively using the data network, I keep 4g. Once I quit using data or go to wi-fi though, I switch back to 3g after a short period. Quick toggle of airplane mode and almost instantly connects back to 4g again, with the same results of dropping shortly thereafter.
I'm in a spotty area, 4G sticks on one bar and rarely reverts to 3G. Signal loss very rarely. Always comes back auto. Faulty modem sw, SIM, hardware, or towers.
I called lg about the issue they say it was Verizon's fault and there radios .. So they sent me the international version works perfect now I would recommend anyone here to drop Verizon they are **** and highly overpriced
I'm having some problems making calls in a certain area I spend a lot of time in. My Nexus 6p is using Straight Talk's CDMA/Verizon SIM. When I was with Verizon Prepaid and PagePlus using a my old phone I had voice only in this particular area. Now that I switched my phone and mvno I get LTE there, but when I try to make a call it immediately hangs up. Everywhere else everything works fine.
Straight Talk customer service is a joke. Maybe the extra bands on the Nexus are making it connect to the wrong tower? I tried switching CDMA/GSM/Global but the service remains the same there. Switching those in other areas actually makes me lose service. Any ideas?
(As far as I know only AT&T and Cellcom have LTE there. I don't think data should work on other towers because of my APNs)
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I recently switched from Sprint to Verizon and I have had multiple issues with my 6P. First of all, voice quality is pretty bad, very low & crackling. Also, when I run a speed test on my phone I will get about 11mb on my device but my wife's s7 will get 21. I live in Arizona near Phoenix, is anyone else experiencing similar issues?
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Turn off the 4G LTE mode under cellular networks in settings. Should fix that issue if it's similar to the issue I was having. Can't comment on the speed issue. No issues here with that.
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Don't have much in the way of a fix, but I've got no issues on vzw in East Mesa.
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Turning off LTE as Tu3218 suggested does seem to be the fix for those Verizon customers that have that issue. Just wanted to note that not all of see that issue, though. I have LTE on and voice quality is fine where I live. Some suspect it's a phone issue. If you have Nexus Protect on your phone, you might try to contact Google support about it.
I find my signal strength is not as good as our Samsung phones. My old S5 and my wife's Note are both better at picking up a weak signal and they get better speed test results, although not nearly as big a difference as you're seeing.
I'm on Verizon with my 6P. Recently switched from ATT. Central Florida
Voice quality is great for me. Specially with other Verizon customers (HD Voice / AMR Wideband). Speeds on band 4 LTE are normally >40Mb/s down, >20Mb/s UP. Band 13 is normally ~20Mb/s Down, ~10Mb/s Up.
Have run multiple roms. All seemed fine. Including current rom (Android N Dev Preview)
Thanks for everyone's responses, I have attempted turning off the LTE mode with no luck. Also, if I'm talking to someone with Verizon, voice quality is great especially with HD voice. Unfortunately for me, the majority of my calls are to Sprint customer and that's where I have a bad experience. I will contact Google support and see what they say.
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Just spoke with Google support and they will believe it's a hardware issue and will replace my device under warranty.
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