So no SVDO on Sprint S4 :/ - Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot

Hi, about a week ago I finally upgraded to the S4 from the S3. And so far, I absolutely love the phone! Only let down, no SVDO (which is dual CDMA radios allowing for simultaneous phone calls and data for those of you who don't know). Because that was one of the features I loved about the S3 and I utilized often. Especially during boring phone calls and/or being put on hold for while. It would allow for me to surf the web, or go on FB while being on a call.
But rumor has it that they decided to forgo SVDO because Sprint was well on their way in deploying LTE, and simultaneous LTE/Voice is possible.
I don't currently live in an LTE area. Can anyone in an LTE area confirm if this is true??
Thx.

Yes it works with LTE as the LTE and call use two different radios. Thus letting us use voice and data at the same time. Works while on WiFi too. Only 3g it doesnt.
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daniel4653 said:
Yes it works with LTE as the LTE and call use two different radios. Thus letting us use voice and data at the same time. Works while on WiFi too. Only 3g it doesnt.
Sent from my SPH-L720 using Tapatalk 4
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AWESOME! Thanks for confirming!!
Sent from my SPH-L720 using xda app-developers app

Yes it only works on WiFi and lte for Sprint. All though other carriers that actually have good networks and even t-mobile can do it. Just one more thing Sprint's network lacks.
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Nope. You need LTE or Wifi. The S3 will probably be the last phone to carry SVDO

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Can anybody else's use data and voice simotaneously

I just tried it and it works. Did not work on my 4s.
Sent from my galaxy s3
Would help if you mentioned carrier. I am assuming you're referring to Verizon LTE as ATT and T-Mobile support this since they are GSM.
Sent from my Galaxy S3
I just tried it and it works. Did not work on my 4s. I'm sorry. For sprint.
Sent from my galaxy s3
Sent from my galaxy s3
I know on Verizon this is only possible when on LTE. On 3G it's still impossible due to the nature of CDMA.
Yeah know that. But it's still working on 3g in Memphis Tn.
Sent from my galaxy s3
Works on my htc rezound on lte and i'm fairly certain it's the only phone save the thunderbolt that can also do it on cdma.
EDIT: Yup, works like a champ!
On SIII on vzw 3g also works when on calls
Sent from my SCH-I535 using Tapatalk 2
Read somewhere that this was possible due to the dual radios in the phone...
And I just tried it... and it worked, so yes, it can do voice and data simultaneously!
data and calls work on sprint simultaneously 3g and LTE (in theory LTE anyway)
ExodusC said:
I know on Verizon this is only possible when on LTE. On 3G it's still impossible due to the nature of CDMA.
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Both rezound and thunderbolt can do data and voice over 3G cdma as they both have dual 3G radios.
I didn't think the GSIII could though. Am I reading right that people with sprint and this phone can?
That'd be nice if the Verizon version can. One thing I love about my rezound.
Sent from my ADR6425LVW using xda app-developers app
ExodusC said:
I know on Verizon this is only possible when on LTE. On 3G it's still impossible due to the nature of CDMA.
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it's not actually a limitation of cdma, it's a limitation of Verizon, and i actually believe it's an artificial limitation, likely to "protect their network and users", as they like to claim for everything....
i have done it a few times on my Sprint gs3, on 3g, since I'm stuck without lte in my city right now.
sarreq said:
it's not actually a limitation of cdma, it's a limitation of Verizon, and i actually believe it's an artificial limitation, likely to "protect their network and users", as they like to claim for everything....
i have done it a few times on my Sprint gs3, on 3g, since I'm stuck without lte in my city right now.
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If you read my post above yours...you'll find you are not right.
Sent from my ADR6425LVW using xda app-developers app
This works on my sprint sg3 and it works on the evo lte... Which one of my main reasons for upgrading to a new phone. This s due to the separation of the radios that prevented this before.
blackhand901 said:
Yeah know that. But it's still working on 3g in Memphis Tn.
Sent from my galaxy s3
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Again no carrier? if on ATT then it always worked.
Sorry I saw you said sprint in an earlier post.
blackhand901 said:
I just tried it and it works. Did not work on my 4s.
Sent from my galaxy s3
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As in, be on a phone call and browse the net at the same time? Yep....but I've been able to do that since my Atrix 2....dont remember if my x10 could.
via Galaxy S III
I was just doing some WiFi tethering and I received a phone call... Noticed I was still getting emails. My first thought was that my laptop automatically reconnected to my work's wireless connection. NOPE! I verified again with an outbound call... Data works on the phone and over tether DURING the phone call. Supposedly this was going to be a feature of EVDO Rev. A, but Sprint had not initiated it yet. This is freaking fantastic. I guess our phones started using 3G for voice
Sprint SGSIII blue
Sprint enabled this under their network as part of Sprint Vision. It is basically an advanced 1X data network that allows data while on phone calls. Only the newer phones with certain frequencies support it. Doesn't force us to use 4G or Wi-Fi if we want data and phone calls together. IPhones do not support this unless you're on a GSM network which Sprint isn't. Sprint is CDMA like Verizon.
Sent from my SPH-D710 using xda premium
I noticed this during a call yesterday and I was pleasantly surprised. When I was reading about this earlier, I thought it would be a feature supported only by towers that had eHRPD support but this is pretty awesome in itself.
ExodusC said:
I know on Verizon this is only possible when on LTE. On 3G it's still impossible due to the nature of CDMA.
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It is possible with the Thunderbolt, and Rezound on Verizon. It also works with GSIII. I was a little torn about getting this phone since I figured I would lose this functionality but was pleasantly surprised when I did a test for s & g's.

Nexus 4 on sprint

So sorry if this is a noobly question, I just haven't been able to find an answer anywhere on the internet or by calling around.
Will the google nexus 4 work on Sprint at all? I don't need LTE and I doubt I'll ever get it in my area. I'm fine with just regular 3G speeds.
(Lincoln, Nebraska ranked 4th worst city in the US for cell phone coverage. Awesome right?)
I really want to get this phone, but GSM is practically non-existent in my area, and I would probably go broke without Sprint's unlimited data.
I saw somewhere something about this phone having WCDMA. And I know Sprint runs on CDMA. Not sure if this is compatible.
Thanks for any answers provided
Scripted said:
So sorry if this is a noobly question, I just haven't been able to find an answer anywhere on the internet or by calling around.
Will the google nexus 4 work on Sprint at all? I don't need LTE and I doubt I'll ever get it in my area. I'm fine with just regular 3G speeds.
(Lincoln, Nebraska ranked 4th worst city in the US for cell phone coverage. Awesome right?)
I really want to get this phone, but GSM is practically non-existent in my area, and I would probably go broke without Sprint's unlimited data.
I saw somewhere something about this phone having WCDMA. And I know Sprint runs on CDMA. Not sure if this is compatible.
Thanks for any answers provided
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Not with the current variants. Wcdma is a umts/gsm technology.
Sent from my GT-P7510 using Tapatalk 2
likely expect a cdma version like always months later. similar to how sprint did with the nexus s 4g and galaxy nexus LTE. my guess is a sprint version sometime in the spring. LTE hopefully as the past sprint variants had its latest 4g radio (wimax/LTE)

Talk and use data connection?

Why cant I talk and use data at the same time? Is there anyway to fix this? Currently using 4g...
Worked perfectly on my HTC One X....
riceboiler said:
Why cant I talk and use data at the same time? Is there anyway to fix this? Currently using 4g...
Worked perfectly on my HTC One X....
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What carrier, what version of the S4?
Sent from my Galaxy Nexus using Tapatalk 2
riceboiler said:
Why cant I talk and use data at the same time? Is there anyway to fix this? Currently using 4g...
Worked perfectly on my HTC One X....
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No.
4G/LTE is at the moment on most carriers in the world I believe a data only service. If you make a call, the phone will look for a 3g or 2g network to make a voice call on. If it goes to 3G then some carriers allow data and voice simultaneously, others dont.
At some point, some carriers will enable VoLTE (Voice over LTE) which should mean you can do Voice and Data at the same time.
As far as I am aware, the HTC One X isnt an LTE phone, so you were using 3G and the explanation lies above.
Mine is s4 non LTE version. And i cant talk with data connection at same time.
Can someone give the advice?
jcheng said:
Mine is s4 non LTE version. And i cant talk with data connection at same time.
Can someone give the advice?
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As above, your carrier may not support it. It may even be down to different configurations on the bts your connected too. Depending on the amount of backhaul to it, it may not be allowed. Some bts in a different area may be configured differently, or, as mentioned yor network doesn't support it at all.
Sent from my iPad using Tapatalk (how ironic is that eh)
Tomo1971 said:
As above, your carrier may not support it. It may even be down to different configurations on the bts your connected too. Depending on the amount of backhaul to it, it may not be allowed. Some bts in a different area may be configured differently, or, as mentioned yor network doesn't support it at all.
Sent from my iPad using Tapatalk (how ironic is that eh)
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I were using other phone with same simcard connection, and im able to do that multitasking (data and call with same time).
Just wondering is there any setting on s4, as i dont believe it because of my bts connection doesnt allow.
Btw Tomo, thanks for your advice.
My s4 i9505 on Three UK allows it. I often send whatsapp messages while on a call.
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Mine on tmobile uk allows it sometimes but not all the time. That maybe down to differences in the Orange network that tmobile share.
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LTE not appearing in notification Bar

I saw LTE yesterday in my notification bar, and that was the first time I saw it in 2 weeks. I always have 4G, but I believe that's HSPA+. Anyone have anything similar, and how they would fix it?
Sent from my SGH-I337M using xda app-developers app
QuickSkope said:
I saw LTE yesterday in my notification bar, and that was the first time I saw it in 2 weeks. I always have 4G, but I believe that's HSPA+. Anyone have anything similar, and how they would fix it?
Sent from my SGH-I337M using xda app-developers app
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Maybe there are issues with LTE in your area? If you didn't change anything on the phone I would reboot it just to be sure but it's probably a coverage issue.
I'm gonna talk to Rogers today, cause I should have LTE around my area.
Sent from my SGH-I337M using xda app-developers app
HSPA+ is H+, not 4G. Test your connection speed if you're unsure, anything over 10mbps (especially for upload) is most likely LTE. I get around 24-36mbps up here in Canada.
Edit: Ah, that might be different for each carrier then. I definitely get H+ when I am on HSPA+.
8mb/s. On download, I don't believe those are LTE speeds, and if they are they're pass poor.
Also, never seen H+ on my GS4, so I think 4G is HSPA+.
Sent from my SGH-I337M using xda app-developers app
The "4G" indicator is HSPA+.
Sent from my SAMSUNG-SGH-I337 using xda premium
On the AT&T version, when on LTE, there is a small print "LTE" under the 4G symbol. The term 4G has been abused so much, God knows what it means on any given device.
I`ve got the rogers one and it says LTE when theres LTE and 4G when there isn`t.
Check your apns and make sure its ltemobile.apn set up ?
kylecore said:
I`ve got the rogers one and it says LTE when theres LTE and 4G when there isn`t.
Check your apns and make sure its ltemobile.apn set up ?
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Where are you located? And ya, I have my Rogers LTE and my tethering APN as well.
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QuickSkope said:
Where are you located? And ya, I have my Rogers LTE and my tethering APN as well.
Sent from my SGH-I337M using xda app-developers app
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I'm in Chatham Ontario.
Between Windsor and London
I think it might be a radio issue with the stock ROM. It was the same on the S2 Skyrocket, some radios worked better than others. The Radio I had on my S2 when I switched over to the S4 showed LTE in my area constantly. Previous radios on that phone were hit and miss...some a lot better than others. I guess we will have to wait until the BootLoader is unlocked (for AT&T S4s) and other basebands (radios) are released until we can test and see which one works better in each area.
My S4 has a pretty good connection now, but it too shows 4G where it use to show LTE. Like I said, some radios do better than others when handling LTE connections.
So apparently the representative lied to me and said that I would have LTE, but my region doesn't support it. That's awesome : /. Thought it doesn't explain why I had it for a brief period. Maybe it came from a tower with LTE. Weird.
Well, This things going back unless a representative can give me a decent deal : /
QuickSkope said:
So apparently the representative lied to me and said that I would have LTE, but my region doesn't support it. That's awesome : /. Thought it doesn't explain why I had it for a brief period. Maybe it came from a tower with LTE. Weird.
Well, This things going back unless a representative can give me a decent deal : /
Click to expand...
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Are you positive that your area doesn't have LTE? Just because the phone is capable of having LTE doesn't mean you are guaranteed an LTE signal. You have to be within the LTE broadcast area and, your phone's modem (radio) has to pick up that LTE signal. Like I said before, the phones radio has a lot to do with it. Some just handle LTE connection (and all connections) better than others. Radios are flashable, but the bootloader has to be unlocked, with custom recovery installed and different versions of the radio have to be available before Devs can make them flashable. Some will do better than others. It's just a matter of trying them when they are available.
scott14719 said:
Are you positive that your area doesn't have LTE? Just because the phone is capable of having LTE doesn't mean you are guaranteed an LTE signal. You have to be within the LTE broadcast area and, your phone's modem (radio) has to pick up that LTE signal. Like I said before, the phones radio has a lot to do with it. Some just handle LTE connection (and all connections) better than others. Radios are flashable, but the bootloader has to be unlocked, with custom recovery installed and different versions of the radio have to be available before Devs can make them flashable. Some will do better than others. It's just a matter of trying them when they are available.
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I live in Nanaimo BC, Checking the Rogers Map, it states that LTE is "Coming Soon". Which is ambituitous to say the least.
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LTE During Calls

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?
Sent from my Galaxy S4 using Tapatalk 4 Beta
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.
Sent from my GT-I9505 using xda app-developers app
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.
Sent from my SAMSUNG-SGH-I337 using xda premium
Figured as much. Thanks guys!
Sent from my Galaxy S4 using Tapatalk 4 Beta
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.
Sent from my Xoom using Tapatalk HD
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!
Sent from my Galaxy S4 using Tapatalk 4 Beta
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?
Sent from my Galaxy S4 using Tapatalk 4 Beta
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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