Voice calls while on LTE? - T-Mobile Samsung Galaxy S 4

When you make or get a voice call on LTE, does your phone disconnect from LTE and switch to 3g/H? Just wondering if this is normal?

sharklaser12 said:
When you make or get a voice call on LTE, does your phone disconnect from LTE and switch to 3g/H? Just wondering if this is normal?
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Yes perfectly normal.
I believe its due to either LTE being Data only or LTE not being able to do Data and voice at the same time. I forget which one it is.

I think it's only data for now
Sent from my SGH-M919 using xda app-developers app

y2whisper said:
Yes perfectly normal.
I believe its due to either LTE being Data only or LTE not being able to do Data and voice at the same time. I forget which one it is.
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It's actually because lte is being used as HD voice. I'm trying to disable HD voice to see if it changes the behavior.
Sent from my SGH-M919 using Tapatalk 2

LTE is data only for now. You're gonna have to wait for VoLTE (Voice over LTE)

SmiLey497 said:
LTE is data only for now. You're gonna have to wait for VoLTE (Voice over LTE)
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That doesn't make sense though. If LTE is data only, then it would use LTE for data, and use 4G or anything else for voice, allowing you to have both voice and data.. Unless the radio can only support one frequency at a time then it would force it to use 4G or the next available frequency.

http://m.computerworld.com/s/articl...telephony_apps?mm_ref=https://www.google.com/
VoLTE will enable that... Right now the phones have to have two radios enabled at the same time... One for data and one got voice.
Sent from my SGH-M919 using xda app-developers app

Related

Can you have 4g but not 3g and still send messages?

Is there a way to only have 4g lte and the radio for calling and texting or do you have to have 3g on as well. I have perfect 4g and don't need 3g on but I do need to text and all I see is 4g/cdma which turns up to me 3g and Lte only, can't send messages. Any helps appreciated.
Sent from my Galaxy Nexus
You did not specify what carrier you are on. If you are on verizon the answer is no, verizon still uses 3g for voice. I am not even sure this question applies to any other carrier except maybe sprint.
stickerbob said:
You did not specify what carrier you are on. If you are on verizon the answer is no, verizon still uses 3g for voice. I am not even sure this question applies to any other carrier except maybe sprint.
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Doesn't sprint live off Verizon's Stuff???
Not sure. Member reading that.
4G LTE is data only.
xXDLD511Xx said:
Doesn't sprint live off Verizon's Stuff???
Not sure. Member reading that.
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How would it? They are separate NATIONAL carriers, not regional.
Sent from my Galaxy Nexus using Tapatalk 2
So you wouldn't be able to have say, lte on and 1x radios on? This wouldn't be more batter efficient than 3g and lte?
Sent from my Galaxy Nexus
theking_13 said:
How would it? They are separate NATIONAL carriers, not regional.
Sent from my Galaxy Nexus using Tapatalk 2
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That has nothing to do with it. There for a time, Sprint was piggybacking off of Verizon to actually have decent coverage. This was EvDo and voice only however. This is still the case, but you will not be able to do the same with LTE.
joshpersaud said:
So you wouldn't be able to have say, lte on and 1x radios on? This wouldn't be more batter efficient than 3g and lte?
Sent from my Galaxy Nexus
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1x and EvDo are on the same radio. So you couldn't shut off just 3G, and the OS won't let you do LTE only either.
Nope.
Call, SMS, MMS use 3g
Only data uses 4g now.
Sent from my Galaxy Nexus using XDA
So why is it that when I turn off 3g I can still send messages?
Sent from my Galaxy Nexus
montbazon said:
Nope.
Call, SMS, MMS use 3g
Only data uses 4g now.
Sent from my Galaxy Nexus using XDA
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Close.
Calls, SMS use 1x which is a voice only channel.
MMS and the rest of data use 3G and LTE.
joshpersaud said:
So why is it that when I turn off 3g I can still send messages?
Sent from my Galaxy Nexus
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Because the phone sending voice and messages through the GSM/CDMA/WCDMA (Depending on availability).
The 4G specifications arent complete as for yet, only the data mechanism has been approved.
joshpersaud said:
So why is it that when I turn off 3g I can still send messages?
Sent from my Galaxy Nexus
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You don't turn off 3G.

How to force LTE only on Sprint Galaxy Nexus? [Without Root]

Is there a way to do this and if not is there a way to do by rooting the phone? What is the best and simplest way to root the phone if need be. Like a stock root by just rooting it without flashing new ROMS.
I have decent 4G LTE coverage like 2 or 3 bars but my 3G coverage is like 3 to 4 bars so it keeps switching over to 3G. When I am in the right spot like upstairs rather than downstairs the 4G LTE is blazing fast. If I had a program to keep it on 4G LTE downstairs that would be great.
Dialer>*#*#4636#*#*> phone information> scroll down and choose lte only from the menu
Hope it helps
Sent from my Galaxy Nexus using xda premium
minhajmsd said:
Dialer>*#*#4636#*#*> phone information> scroll down and choose lte only from the menu
Hope it helps
Sent from my Galaxy Nexus using xda premium
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That won't stick.
And you can't force LTE only even with root.
LTE is data only, how are you going to receive calls and texts?
Dialer>*#*#4636#*#*> You have to have MSL number which I can't get on the Galaxy Nexus Sprint Version. And also I heard that it does not give you an LTE only option just the same one in the system [LTE / GSM].
Also I don't care whether I can make or receive calls. When I just want to use the phone for DATA at the moment I use Foxfi so I can just use it as a wifi hot spot. When I am done I can put it back on to 3G.
Anyone know how to get the MSL number for Sprint Galaxy Nexus?
Also you are telling me with root or no root there is no way to force the phone to stay on 4G LTE? I find that hard to believe and if it is that is sad.
It is not possible to do LTE only on this device.
Why is that? Can anyone create an APP for it or is it hardware?
needspractice said:
Why is that? Can anyone create an APP for it or is it hardware?
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Hardware.
adrynalyne said:
It is not possible to do LTE only on this device.
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Is there no way to build a ROM/kernel from AOSP that has the CDMA radio disabled? does the LTE radio require the CDMA radio to be transmitting?
Exactly, I mean if the radio can be on 4G and not 3G why can it not stay on 4G? Is it still on 3G when it shows its on 4G like on both of them on at the same time? And if that is the case can you force the weaker 4g as primary and leave 3G on in the background?
Anything at all here? Will some of the apps on the market work for the Nexus? What if I get msl code and use 4G only in that? Has anyone tested that?
Sent from my Galaxy Nexus using XDA Premium App
It uses 3G and 4G concurrently, if not how are you going to receive calls and texts?
Like I already said, changing it to LTE only in the *#*#4636#*#* menu won't stick, regardless of whether you are rooted or not.
Mach3.2 said:
It uses 3G and 4G concurrently, if not how are you going to receive calls and texts?
Like I already said, changing it to LTE only in the *#*#4636#*#* menu won't stick, regardless of whether you are rooted or not.
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I think we are all aware that LTE is not for calls - the poster said he wants data only...
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efrant said:
I think we are all aware that LTE is not for calls - the poster said he wants data only...
Sent from my Galaxy Nexus using Tapatalk 2
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part 2 still stands.
Yes I do not care about voice calls. If I want to download a movie or something I do not have to have calls during that time. So has anyone found any new information or app that will perform this function to Force 4G on the Galaxy Nexus? Again I do not care about Voice Calls.
Sent from my Galaxy Nexus using XDA Premium App
All the Mifi hotspots can be set to do LTE only. This should definitely be possible especially since support for voice through data is right around corner.
Okay I rooted my phone, and got MSL code, but now when I go through all the settings I still do not have LTE only setting just hybrid as my last option. I have been reading some forums and some people with Sprint phones have LTE only option. Is this true? Do I need a paticular ROM? Anyone figure this out or have any idea?
Best,
needspractice
Anyone?
Sent from my Galaxy Nexus using XDA Premium App
I know how
needspractice said:
Anyone?
Sent from my Galaxy Nexus using XDA Premium App
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This works on my Galaxy Victory for Virgin Mobile.. it does mean you can't recieve calls but I use it anyway..
Download an app in play store called "Show Service Mode" - costs a little $
Open the app
Select the third box to create a shortcut
Go back to the main screen and click the new shortcut
Select LTE band preference
Then select LTE ALL
DONE!!!
To switch back to normal open the same shortcut and choose automatic

[Q] Simultaneous Voice and Data GS3 T-Mobile

I have a GS3 with T-Mobile prepaid (60 a month) my Simultaneous Voice and Data is not working? is this a problem with the prepaid service? the Simultaneous Voice and Data will work for a few min's then cut off and i cant get data back until i end the call im on.
I'm running Cm10 Nightlights
I was on Simple mobile and had the same problem.
is this a phone problem, service problem, ROM problem? i thought T-Mobile supported Simultaneous Voice and Data?
Works great for me but makes sure you have 3g or better.
Sent from my SGH-T999 using Tapatalk 2
elesbb said:
Works great for me but makes sure you have 3g or better.
Sent from my SGH-T999 using Tapatalk 2
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i for sure have 3G or better in my area, are you using the Prepaid service?
Amore514 said:
i for sure have 3G or better in my area, are you using the Prepaid service?
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Since Tmobile using GSM network, it should be possible anyway. Did you try rebooting?
agm1101 said:
Since Tmobile using GSM network, it should be possible anyway. Did you try rebooting?
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ya i have restarted, i also have tried 3 other ROMS beside CM

[Q] download data and talk on phone at the same time?

I am thinking purchasing this phone in the next week or so and I have a question for those that already have it. I have had people (even from sprint) tell me that you can use the data with wifi OFF and place a phone call at the same time and some people (even from sprint) tell me you can't. Basically can you download a app while in a phone call with wifi OFF? thanks for your help.
Not on 3G. I hear its possible on LTE but I don't have it yet in my area.
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emeraldayotte said:
Not on 3G. I hear its possible on LTE but I don't have it yet in my area.
Sent from my SPH-L900 using xda app-developers app
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This^ and with Wi-Fi
Sent from my Galaxy Note II using Tapatalk
I can confirm that simultaneous voice and data do indeed work only with LTE (and WIFI of course), and not with 3G.
airbus001 said:
I can confirm that simultaneous voice and data do indeed work only with LTE (and WIFI of course), and not with 3G.
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Ok so if I have the LTE signal and wifi OFF it will work or if I have NO LTE but have wifi ON with a signal? just want to make sure otherwise going to get a different phone (dont want to spend $300 and not have that feature)
deerkiller11 said:
Ok so if I have the LTE signal and wifi OFF it will work or if I have NO LTE but have wifi ON with a signal? just want to make sure otherwise going to get a different phone (dont want to spend $300 and not have that feature)
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Click to collapse
LTE ON WIFI ON/CONNECTED.....will work
LTE ON WIFI OFF/NOT CONNECTED.....will work
3G ON WIFI ON/CONNECTED.....will work
3G ON WIFI OFF/NOT CONNECTED.....won't work
emeraldayotte said:
LTE ON WIFI ON/CONNECTED.....will work
LTE ON WIFI OFF/NOT CONNECTED.....will work
3G ON WIFI ON/CONNECTED.....will work
3G ON WIFI OFF/NOT CONNECTED.....won't work
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Thanks for the quick reply. where did you get your info? I see in your first statement that you dont have LTE in your area. just wanting to confirm this data with someone who has LTE because I live in an area with it.
deerkiller11 said:
Thanks for the quick reply. where did you get your info? I see in your first statement that you dont have LTE in your area. just wanting to confirm this data with someone who has LTE because I live in an area with it.
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There have been other folks in the forums who do have LTE and have confirmed that it works.....one example:
airbus001 said:
I can confirm that simultaneous voice and data do indeed work only with LTE (and WIFI of course), and not with 3G.
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Click to collapse
Also articles like this one and other posts like this one. There is a 14 day return policy with Sprint so if you're in an area that has LTE, you can test. If it doesn't work, return it within the 14 days and you're good.
emeraldayotte said:
There have been other folks in the forums who do have LTE and have confirmed that it works.....one example:
Also articles like this one and other posts like this one. There is a 14 day return policy with Sprint so if you're in an area that has LTE, you can test. If it doesn't work, return it within the 14 days and you're good.
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Click to collapse
Thanks again for the prompt reply, I had tried to do some searches and not found those results. Thanks for the links.
AFAIK the only sprint phones with SVDO on 3g are the Galaxy s3 and the EVO LTE.
deerkiller11 said:
Ok so if I have the LTE signal and wifi OFF it will work or if I have NO LTE but have wifi ON with a signal? just want to make sure otherwise going to get a different phone (dont want to spend $300 and not have that feature)
Click to expand...
Click to collapse
If somebody had a gs3 in one hand and a note II in the other and explained everything about them, and the last thing they told me was that I cant post on my wall while talking on the phone with the note II. I would still buy the note II with all the features and power this phone has.
From what I gather the reason this only works on LTE or Wifi is that the data is used from those, the 3g is used for talk during the call so it can use its secodn set of of antennas for data.
There are other phones with Sprint that have dual cdma chips in them (ie LG Viper)
Sent from my SPH-L900 using xda premium
---------- Post added at 11:45 PM ---------- Previous post was at 11:41 PM ----------
HorreC said:
From what I gather the reason this only works on LTE or Wifi is that the data is used from those, the 3g is used for talk during the call so it can use its secodn set of of antennas for data.
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The 3g uses the same network as voice (ie CDMA) only one can use it at a time, either voice or data. However 4g wimax and 4g lte use a different network so therefore you can surf and talk simultaneously. Unless the phone has dual cdma chips in them to do 3g and talk simultaneously which few of sprints phones are equipped with.
Sent from my SPH-L900 using xda premium
odlihp said:
There are other phones with Sprint that have dual cdma chips in them (ie LG Viper)
Sent from my SPH-L900 using xda premium
---------- Post added at 11:45 PM ---------- Previous post was at 11:41 PM ----------
The 3g uses the same network as voice (ie CDMA) only one can use it at a time, either voice or data. However 4g wimax and 4g lte use a different network so therefore you can surf and talk simultaneously. Unless the phone has dual cdma chips in them to do 3g and talk simultaneously which few of sprints phones are equipped with.
Sent from my SPH-L900 using xda premium
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Doesn't SVDO however kill the battery faster
Sent from my SPH-D700 using xda app-developers app

Disable 1x & 3G data on VZW?

I want to force my toro to connect data through 4G while still allowing voice calls and SMS. Is there a setting for this somewhere, or do I have to make a custom PRL with all the VZW CDMA towers marked as roaming?
Sent from my Paranoid Galaxy Nexus
vespoid said:
I want to force my toro to connect data through 4G while still allowing voice calls and SMS. Is there a setting for this somewhere, or do I have to make a custom PRL with all the VZW CDMA towers marked as roaming?
Sent from my Paranoid Galaxy Nexus
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the LTE chip doesnt allow VoLTE.
if you disable 1x/cdma, you will not have voice.
I am aware of the lack of 4G voice capability on the Nexus. Is it possible to use CDMA in a voice mode and connect to data only on 4G?
Sent from my Galaxy Nexus using xda app-developers app
vespoid said:
I am aware of the lack of 4G voice capability on the Nexus. Is it possible to use CDMA in a voice mode and connect to data only on 4G?
Sent from my Galaxy Nexus using xda app-developers app
Click to expand...
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it already does this if you're in a LTE area.
It still drops to 3G when I have low LTE signal. I'm always in an LTE service area or on WiFi so I don't want CDMA data at all.
Sent from my Galaxy Nexus using xda app-developers app

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