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Htc Evo 4g Is for all user or only Sprint???????

Who knows that?

eshghman189 said:
Who knows that?
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The 4g portion will only be compatible with sprint's network.
The phone can technically work with other cdma carriers if you know what your doing, and will require some skill to get it to work, or a guide from someone that figures it out. 3G and 1x would possibly work if stuff is configured correctly, the radio is technically compatable with other carriers for everything other than 4g
This doesn't mean you can walk into bell south or verizon and say "hook it up" because that will definitely not work. You gotta make it work, I'm sure more info on how to do it will arise as people get their hands on it, as some have gotten the hero to work off sprints network.

I doubt 4G will work on Verizon's network those are to my knowledge the only major CDMA netwrks (in the US at least).
Verizon's take on 4g will be LTE while Sprint is going WiMax so I seriously doubt the phone's 4G radio will work across the board however the 3G and the call CDMA radio should work.

Sebrina said:
I doubt 4G will work on Verizon's network those are to my knowledge the only major CDMA netwrks (in the US at least).
Verizon's take on 4g will be LTE while Sprint is going WiMax so I seriously doubt the phone's 4G radio will work across the board however the 3G and the call CDMA radio should work.
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From what I gather the radios will operate on different frequencies
wimax on 2.5 GHz
http://en.wikipedia.org/wiki/WiMAX#Spectrum_allocation
lte is on 700 MHz
http://en.wikipedia.org/wiki/3GPP_Long_Term_Evolution#Frequency_bands_and_channel_bandwidths
so I'm going to go ahead and say not a chance of it working.... although I may be wrong

Tanx
Plz tell me more

more about what? the different frequencies?
Um well, for example you can't tune your tv to the radio channel even though they use similar technologies. (well you could back in the day depending on your tv but that isn't helping my point ) But it just uses different frequencies, look at this for a better understanding of frequency allocation,
http://upload.wikimedia.org/wikiped...locations_Chart_2003_-_The_Radio_Spectrum.jpg
The chart is rather busy, but see how each is boxed off? That is what a radio designed to operate on will be limited to. the wimax and lte are very far apart from each other in this spectrum, it will be extremely unlikely it will be able to operate on both frequencies.
This talks about the radio used in the EVO.
http://www.thesearethedroids.com/2010/03/25/sprint-evo4-chipset-qsd8650-supports-gsm-and-hspa/
Not an insane amount of LTE info is out there other than what's been cleared by the FCC, more info on the radios that will be used as soon as one is released. I know one thing, the freqs are different so the same roaming you enjoy now with sprint 3g will not be shared with 4g with verizon when they kick off LTE. 3g roaming will stay unaffected per sprint and verizon's roaming agreement because of same technologies and freqs used. Only the 4g portion will be different.
One chipset to be on the lookout for is this http://www.beceem.com/ends_4G_debate_LTE.html it will support both technologies, but it unfortunately will not be in the sprint EVO. Be on the lookout though as something with this chipset might counter the aforementioned roaming problem.

johnsongrantr said:
more about what? the different frequencies?
Um well, for example you can't tune your tv to the radio channel even though they use similar technologies. (well you could back in the day depending on your tv but that isn't helping my point ) But it just uses different frequencies, look at this for a better understanding of frequency allocation,
http://upload.wikimedia.org/wikiped...locations_Chart_2003_-_The_Radio_Spectrum.jpg
The chart is rather busy, but see how each is boxed off? That is what a radio designed to operate on will be limited to. the wimax and lte are very far apart from each other in this spectrum, it will be extremely unlikely it will be able to operate on both frequencies.
This talks about the radio used in the EVO.
http://www.thesearethedroids.com/2010/03/25/sprint-evo4-chipset-qsd8650-supports-gsm-and-hspa/
Not an insane amount of LTE info is out there other than what's been cleared by the FCC, more info on the radios that will be used as soon as one is released. I know one thing, the freqs are different so the same roaming you enjoy now with sprint 3g will not be shared with 4g with verizon when they kick off LTE. 3g roaming will stay unaffected per sprint and verizon's roaming agreement because of same technologies and freqs used. Only the 4g portion will be different.
One chipset to be on the lookout for is this http://www.beceem.com/ends_4G_debate_LTE.html it will support both technologies, but it unfortunately will not be in the sprint EVO. Be on the lookout though as something with this chipset might counter the aforementioned roaming problem.
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tanx,very useful

interesting
Not that my phone ever roams (I don't travel much), but when it does my Sprint will only go to Verizon? Did I understand that correctly?

Manicmobileaddict said:
Not that my phone ever roams (I don't travel much), but when it does my Sprint will only go to Verizon? Did I understand that correctly?
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Yes, your Sprint phone will only roam on Verizon's network cause their both cdma networks.

Luckily for Sprint users Verizon covers more area than any other carrier in the US.

Luckily for Sprint users Verizon covers more area than any other carrier in the US.
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that's not true Sprint has the biggest coverage area of all the us carriers. don't beleave everything you hear from a commercial.
Sent from my HERO200 using the XDA mobile application powered by Tapatalk

chippillie said:
that's not true Sprint has the biggest coverage area of all the us carriers. don't beleave everything you hear from a commercial.
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Where is this info from?

whole world
I think this phone is for the whole world not sprint,
sprint is only for 4g

eshghman189 said:
I think this phone is for the whole world not sprint,
sprint is only for 4g
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Do WHAT?!
This phone is built for Sprint. Sprint is 3G/4G.

eshghman189 said:
I think this phone is for the whole world not sprint,
sprint is only for 4g
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http://www.thesearethedroids.com/2010/03/25/sprint-evo4-chipset-qsd8650-supports-gsm-and-hspa/
However, it’s almost guaranteed that you won’t be able to use over half of those networks because the phone will lack the right amplifiers and/or antennas
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big band
It is support width band,I think u can change rillphone to work with other country and netwoek

eshghman189 said:
It is support width band,I think u can change rillphone to work with other country and netwoek
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I highlighted the part you need to re-read in my last post (it was a pretty lengthy quote)
but unless you plan to electrically (as in soldering iron and tiny electronic parts) modify your phone, don't plan on it being able to actually use those other frequencies.
They are not advertising it as a world phone (sprint has made worldphones before and advertised it because it's a selling point) so they are not going to put needless hardware that they won't enable, doesn't make sense, and it costs them additional money to make it that way.
If you did get that modification in, you will then have to edit the programming of your phone's cellular radio to talk on those frequencies and towers because they will not be built into whatever radio firmware ships with it because it wasn't needed because the amplifiers were left out. That will be an almost as equally difficult task.
I don't know man... good luck if you don't believe me.

When should we expect 4g on Nextel frequencies?

Thoughts?
Sent from my SPH-D700 using XDA App

Not until every single nextel contract is over at the very earliest.

There's never will. I work for sprint and the next thing for nextel is the door in 2013
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063_XOBX said:
Not until every single nextel contract is over at the very earliest.
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Not necessarily. When ATT upgraded from edge to umts did they kick out all the edge users on umts frequencies, no. All they had to do was allocate enough of the spectrum to accommodate the edge users and move the rest to umts.
Sent from my SPH-D700 using Tapatalk

I'm not sure if Nextel will ever get 4g. I do know for a fact Sprint is phasing out Nextel's network over the next 2-3 years and transferring their accounts to Sprint frequencies.
Sent from my SPH-D700 using XDA App

IDEN is scheduled fror decommission over the next 3 years, why invest in the technology if its already scheduled to die.
Plus, I don't think IDEN technology was optimized enough to support advanced data speeds, that was never its reason of existance.....
Sent from a cave.....

I think there is some confusion to the OPs topic. Sprint will be pushing the kill switch on Nextel/IDEN technologies of the next few years. IDEN is not intended for LTE or data at all. The OP is alluding to the fact that when IDEN is actually dead, there is a lot of free spectrum in Sprint's hands (Spectrum != Protocol) Spectrum that can be used for LTE Transmission. This has been speculated for a long time and 'Project Leap something or another' is supposed to put the theory into action.

The 800MHz frequencies will probably see CDMA on them within the next year. There is more than enough unused resources to allocate 5MHz of the 15MHz sprint has in the 800MHz area to use CDMA. Most areas as it is only use 5MHz worth of sprints 1900MHz spectrum. Since just about every sprint phone as it is roam verizons 800MHz, it's nothing more than sending out a new PRL to take advantage of this. I expect that once IDEN is gone, sprint will use 10MHz in the 800MHz to utilize LTE as well as their 2.5GHz. I'm willing to bet that Sprint will eventually switch to LTE entirely across all of their frequencies. LTE has very low latency and Sprint will continue to cater to business who rely on the sub-second speed of their current IDEN radio use.
LTE can utilize multiple frequencies simultaneously, which means that we, the end user, will benefit greatly. It will be no problem for someone to use a 10MHz block of 800MHz and 10MHz block of 1900MHz simultaneously. There are some very cool things coming in the next few years, and I'm glad sprint is getting on board early.
The benefit of lower frequencies is their ability for penetration, while the benefit of 2.5GHz is the fact that sprint has access to around 170MHz of total bandwidth. The network will be a combination of super high speeds for stationary home solutions while having excellent mobile coverage everywhere. Very cool things are coming.....I can't wait.

Lol....never....

Good Old Nextel was the Shiznit in its day now a 2G Dino , never will it see anything but scrapyard and like earlier posts suggest reuse its BW

Quis89 said:
Lol....never....
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Never what? Sprint already said that 800 will be CDMA, and the new PTT CDMA devices drop in a few months. Hell, all their current IDEN users could use but 5MHz and still be covered.
It's inevitable that LTE will be the only choice in the future. CDMA, like IDEN, will eventually be a thing of the past. Cellular networks are gaining customers, but we're not gaining frequencies. As more people use the same frequencies, the switch to more efficient means of handling them must happen. Everything will eventually be IPv6 data only. The current GSM and CDMA will be replaced by newer protocols. Call quality will continue to increase as well. Hell, a lot of my calls are already QIK video chats.

NoSoMo said:
Never what? Sprint already said that 800 will be CDMA, and the new PTT CDMA devices drop in a few months. Hell, all their current IDEN users could use but 5MHz and still be covered.
It's inevitable that LTE will be the only choice in the future. CDMA, like IDEN, will eventually be a thing of the past. Cellular networks are gaining customers, but we're not gaining frequencies. As more people use the same frequencies, the switch to more efficient means of handling them must happen. Everything will eventually be IPv6 data only. The current GSM and CDMA will be replaced by newer protocols. Call quality will continue to increase as well. Hell, a lot of my calls are already QIK video chats.
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sucks, i dont want people to be seeing me when i make those calls lol. weird

Sprint to deploy 4G LTE network

Looks like Sprint's getting ready to deploy LTE. What does everyone think?
http://www.bgr.com/2011/06/17/sprint-to-deploy-4g-lte-network-with-lightsquared/
http://www.bloomberg.com/news/2011-06-17/falcone-s-lightsquared-venture-reaches-a-15-year-network-deal-with-sprint.html

Last i heard, LightSquared was told by the FCC they weren't allowed to broadcast because they were overpowering civilian and aviation GPS units. Has this issue been resolved? A 15 year deal ain't worth squat if you can't turn on the juice!!

SilverStone641 said:
Last i heard, LightSquared was told by the FCC they weren't allowed to broadcast because they were overpowering civilian and aviation GPS units. Has this issue been resolved? A 15 year deal ain't worth squat if you can't turn on the juice!!
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Yeah, thats what I'm worried about, I wish/hope its as easy as a change of a frequency channel.

I"m sure they will iron those wrinkles before flipping the switch.

It would be like Sprint to throw its weight behind a technology that is failed, different or inferior. WiMAX isn't exactly inferior to LTE, but the 2.5 GHz band it relies on most certainly is inferior to the 700 MHz band that Verizon's LTE uses.

Ok, so lets say they deploy this 4g lte network... what happens to their 4g wimax network? From what little I know about wimax and lte chipsets, I dont think it would be possible for a firmware upgrade to turn wimax to lte. What happens to clear? One important thing to remember is that I didnt actually read the article so these questions may already be answered. haha.
Although, if my evo became a 3g only device, I would actually be ok with that if they drop the $10 a month surcharge

ZachPA said:
It would be like Sprint to throw its weight behind a technology that is failed, different or inferior. WiMAX isn't exactly inferior to LTE, but the 2.5 GHz band it relies on most certainly is inferior to the 700 MHz band that Verizon's LTE uses.
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Words straight out of my mouth.

is there a resource that lists open frequency ranges?

Could the new radio(SMR) thats in the evo 3d work on this frequency and be a dual wimax/lte combo?
Sent from my PC36100

"The company can use LightSquared’s network to lessen the load on its own network as data demand has skyrocketed, an issue that has plagued other carriers. "
It sounds like they will be using them for backhaul, I don't see anything about Sprint using LTE. Right now backhaul is what Sprint is lacking so this will be a good thing for not just 4G but 3G speeds.

Cloyd said:
is there a resource that lists open frequency ranges?
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here is a chart..
http://www.ntia.doc.gov/osmhome/allochrt.pdf

I assume any potential move to lte will address wimax's inferior latency?

Sprint end users will NOT use LTE most likely ever. Sprint (the provider service) will utilize LTE strickly for back haul only. This is a very good thing for us the end user, basically means to us that we will have lots of bandwidth on tap. Wimax offers up to 12MB d/l transport speeds which most of us probably never see anyway. I personally get 7-8 around Baltimore/Annapolis areas of Maryland and this will hopefully allows us to have the bandwidth assuming more towers are deployed for our cell connectivity. This is a very good thing for us and the sooner the better!

sounds like lte will come later on firat is evdo rev o then rev a then rev b then do then do advance then lte
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I have spoken to my sprint rep a lot about how Sprint works. He used to work for Samsung and distributed phones to carriers in the northeastern part of the united states. Because of this, he learned a lot about Sprint. One thing that he learned was that Sprint has the most bandwidth out of all the carriers, and it is one of the main reasons why theory data is truly unlimited.
Just throwing that out there.
Sent from my PC36100 using XDA Premium App

xHausx said:
"The company can use LightSquared’s network to lessen the load on its own network as data demand has skyrocketed, an issue that has plagued other carriers. "
It sounds like they will be using them for backhaul, I don't see anything about Sprint using LTE. Right now backhaul is what Sprint is lacking so this will be a good thing for not just 4G but 3G speeds.
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It talks about Sprint using LTE in the third paragraph of the Bloomberg article.
“LightSquared and Sprint will jointly develop, deploy and operate LightSquared’s 4G LTE network,” according to the letter. “Sprint will become a significant customer of LightSquared’s 4G LTE network.”

Yet more money wasted on Wimax and shoveled into another bad relationship (Clearwire) Stay comfy in number 3 because you're going to be seated here a while, Sprint. At the very least they woke up and realized LTE is the way to go.
However even after Clearwire's long gone. Those who already have Wimax 4g will still be supported until after their devices are long gone. The only ones who will be bit will be the ones that should have upgraded lone ago. Like the ones today who are still carrying around Cingular phones refusing to upgrade to AT&T So at least Sprint will keep their core customers happy to an extent.

Sprint desperate to jump into the LTE iPhone train next year?
Sent from my Nexus S 4G using Tapatalk

What good is backhaul when the airwaves can't reach end users?
It's like having a download server capable of gigabit speed, along with an ISP who can deliver it to you. Except you're saddled with a 1991-vintage 10 Mbps ethernet card.
That's the problem I've been noticing with WiMAX. Sprint has one hell of a data network, but the airwaves used to deliver that network are congested and not well suited to the consumer's needs.

I wonder how likely it is that an upcoming Galaxy 2 or Photon 4G will be LTE / Wimax on Sprint...

Sprint to upgrade netword from EVDO rev. A to Rev B

http://gizmofusion.com/2011/09/spri...1x-advanced-much-faster-3g-speeds-on-the-way/
"Well well well look at what we have found for you folks that are on Sprint. We are not quite certain if this video was posted early or not, as Sprints big network/3G/4G conference is not until next month, but from the look of things their network enhancements are already well underway. What should you expect as a Sprint customer? How about EvDO Rev B which should see speeds in the 5 to 10Mbps down link depending on channel bonding, 1X Advanced which brings voice and data at the same time, as well as spectrum bonding to bring the best coverage available. Even better, Evo 3D and Epic Touch 4G users may be able to take advantage of this very soon.t Lets not forget who brought to you some pretty exclusive stuff regarding their “network vision” well before this was all announced."

It looks like the Epic 4g Touch does not have a rev b compatible radio. Still the best phone I ever owned. Before the OG Evo was on the top of that list.

cdszoke said:
It looks like the Epic 4g Touch does not have a rev b compatible radio. Still the best phone I ever owned. Before the OG Evo was on the top of that list.
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Where did you hear this? I think I read somewhere that it was.
Better question is can the current Evo 4G handle rev.B?

Just curious.....what is a netword
free the dirk

if the following is true the evo supports rev b
http://en.wikipedia.org/wiki/HTC_Evo_4G

As far as I know, the QSD 8650 supports rev. B, at least in hardware.

dottat said:
if the following is true the evo supports rev b
http://en.wikipedia.org/wiki/HTC_Evo_4G
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I didn't think he was right. But..
The EVO features a CDMA cellular radio that supports 3G EVDO, Revisions 0, A, and the
as-of-yet undeployed B [citation needed] allowingfaster download and upload speeds, and better power efficiency. As well as WiMAX, protocol known as 802.16e, which features speeds of up to 10 Mbit/s on the downlink, and 1 Mbit/s on the uplink. The device is marketed as a 4G phone, WiMAX is considered to be a 4G technology based on 4G

I really hope this is true and that the Evo is able to support it! I'd love to get a boost in 3G speeds. I'm getting sick of how slow it gets sometimes and wimax is a joke, way too spotty coverage and very up/down with it's speed.

I wish I could post the links, but the HTC's spec page for the EVO states a QSD 8650 as the SoC and a search on Qualcomm's site confirms rev. B support.

nismotigerwvu said:
I wish I could post the links, but the HTC's spec page for the EVO states a QSD 8650 as the SoC and a search on Qualcomm's site confirms rev. B support.
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I don't think our phones are 1X advanced compatible though. I towuld be nice to be able to use REV B it really would.

My guess is that this would very likely be turned on somewhere for trials.. so perhaps people can keep checking their network status page to see that A turn into a B/....

I doubt that the EVO could take advantage of all of these improvements, although I suppose if the chipset supports rev B then that aspect is certainly possible. I know that when network vision was announced it was said that phones with chipsets supporting aspects of network vision (channel bonding, 1x advanced, etc.) would come out in the summer of 2011, but it was never announced which phones had these new chipsets (or perhaps all new phones after a certain date would have them, which makes sense in the long term as every handset on the network that supports channel bonding gives the network more flexibility).
It's certainly plausible that flagship phones such as the EVO 3D or Samsung Epic Touch would be the first to get them.
Edit: Not sure where in that video it states explicitly that Sprint is rolling out EVDO Rev B, but maybe I missed that. There's really not any new information in that video, this is the same basic info that Sprint's been promoting since network vision was first announced. Anyhow, even if the EVO can't make use or 1x advanced or Rev B, network vision will be good for data speeds on the EVO in a couple of ways: First, every phone that has the new chipsets potentially alleviates congestion on the network by allowing the phone to use 2.5 GHZ spectrum for CDMA voice and EVDO when available, freeing 1.9 spectrum for us EVO users. Second, the new towers provide better signal quality overall, so if you're in an marginal coverage area, you could get better signal quality from the new tower. And third, microwave back haul allows Sprint to no longer rely on its competitors when connecting individual towers to the backbone of its network, which provides increased backhaul capacity at lower cost.
The benefits are obviously more direct for phones with the newer chipsets, but every existing handset will benefit indirectly.

nismotigerwvu said:
As far as I know, the QSD 8650 supports rev. B, at least in hardware.
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Confirmed here

Its interesting that the upload is only 1mbps when I've been getting upwards of 900 right now. But seeing tthe down at 10 is awesome
Sent from my PC36100 using XDA App

fenixjn said:
Confirmed here
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I checked on this before. The SoC supports it but I don't the antenna does. Something like that, check late last year.

using 3G data during a call S4

After checking in to why this would not work I was told that it just isn't supported. You can use 4G and wifi data duringa call but not 3G. It's a little bit ofa draw back for me. I was just wondering what any one else's thoughts where on this?
I do like the phone so far other than this.

tman73 said:
After checking in to why this would not work I was told that it just isn't supported. You can use 4G and wifi data duringa call but not 3G. It's a little bit ofa draw back for me. I was just wondering what any one else's thoughts where on this?
I do like the phone so far other than this.
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I'm taking a chance on sounding silly, but that's just the way it is on CDMA networks. You can only do one or the other on 3G: voice or data. Being able to use voice and data simultaneously is a perk of 4G, LTE or wifi. Of course, if you have no LTE available where you are, or no wifi, it's voice or data. I know it's frustrating. I live in Minneapolis, Uptown area. We never did get very good Wimax at our house, especially indoors.
When the LTE phones came out, I was in no hurry to upgrade, as there was no LTE anywhere in the Twin Cities. No one could hazard a guess as to when it would be rolled out. The Evo LTE has been out for almost a year, and LTE is finally becoming available. It's still pretty spotty, though. The good thing is, even with a weak signal at my house, I still can get nearly 5000kbps down inside my house. That's a lot better than 3G for sure! Sprint is saying we'll have LTE pretty much throughout the city in the next couple of months. I'll believe that when I see it.
I like my S 4 pretty well. It's still strange getting used to Touch Whiz after Sense. I moved to the S 4 after having the original Evo and then the Evo 3D. I'm looking forward to rooting and being able to run custom ROMS on my S 4.

smarcin said:
I'm taking a chance on sounding silly, but that's just the way it is on CDMA networks. You can only do one or the other on 3G: voice or data. Being able to use voice and data simultaneously is a perk of 4G, LTE or wifi. Of course, if you have no LTE available where you are, or no wifi, it's voice or data. I know it's frustrating. I live in Minneapolis, Uptown area. We never did get very good Wimax at our house, especially indoors.
...
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That's not exactly accurate. Some phones can do simultaneous CDMA voice and data. However, it requires extra complexity in the phone (what's called "multiple paths") and with Sprint going to LTE, they decided to put a separate transmit path in the device just for LTE (and Wi-Fi).

smarcin said:
I'm taking a chance on sounding silly, but that's just the way it is on CDMA networks. You can only do one or the other on 3G: voice or data. Being able to use voice and data simultaneously is a perk of 4G, LTE or wifi. Of course, if you have no LTE available where you are, or no wifi, it's voice or data. I know it's frustrating. I live in Minneapolis, Uptown area. We never did get very good Wimax at our house, especially indoors.
When the LTE phones came out, I was in no hurry to upgrade, as there was no LTE anywhere in the Twin Cities. No one could hazard a guess as to when it would be rolled out. The Evo LTE has been out for almost a year, and LTE is finally becoming available. It's still pretty spotty, though. The good thing is, even with a weak signal at my house, I still can get nearly 5000kbps down inside my house. That's a lot better than 3G for sure! Sprint is saying we'll have LTE pretty much throughout the city in the next couple of months. I'll believe that when I see it.
I like my S 4 pretty well. It's still strange getting used to Touch Whiz after Sense. I moved to the S 4 after having the original Evo and then the Evo 3D. I'm looking forward to rooting and being able to run custom ROMS on my S 4.
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There's no harm in sounding silly. :silly: We forgive you.
The Sprint S3 and Evo 4G LTE both do it, it's called SVDO, simultaneous voice and EVDO 3G data (and ofcourse simultaneous voice and LTE and or WiFi).
For some reason, Sprint decided to fore-go SVDO on LTE phones after those two (S3 and Evo 4G LTE) and instead focus on SVLTE. To be fair, in all the years i've been with Sprint (13) i never thought i would ever need or use that feature until i got the S3. The first time i unknowingly used it i didn't even realize that while on a call, i was playing WordFeud multiplayer. It's something i do all the time now, and definitely sad to see it gone on the newer phones.
As their LTE network gets more robust and mature, it won't be much of an issue, but as of now 3G is in more places than their LTE network is. So...

LordLugard said:
There's no harm in sounding silly. :silly: We forgive you.
The Sprint S3 and Evo 4G LTE both do it, it's called SVDO, simultaneous voice and EVDO 3G data (and ofcourse simultaneous voice and LTE and or WiFi).
For some reason, Sprint decided to fore-go SVDO on LTE phones after those two (S3 and Evo 4G LTE) and instead focus on SVLTE. To be fair, in all the years i've been with Sprint (13) i never thought i would ever need or use that feature until i got the S3. The first time i unknowingly used it i didn't even realize that while on a call, i was playing WordFeud multiplayer. It's something i do all the time now, and definitely sad to see it gone on the newer phones.
As their LTE network gets more robust and mature, it won't be much of an issue, but as of now 3G is in more places than their LTE network is. So...
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Thanks to both you guys for setting me straight. I was parroting what I'd always heard from the OG Evo (which I had) and then the 3D, which I just left. Of course, you couldn't do SVDO on either. On the 3D, though, you could do a call + data if on 4G (Wimax), which was and still is, pretty spotty here in Minneapolis-St Paul. Of course, Sprint has been rolling out LTE for a while now. It appears, then disappears a lot. Unfortunately 3G has been awful for months. I will be so thankful when LTE is finally and fully deployed!

No problem, welcome. We are all here to help and learn from each other along the way. :good:

smarcin said:
Thanks to both you guys for setting me straight. I was parroting what I'd always heard from the OG Evo (which I had) and then the 3D, which I just left. Of course, you couldn't do SVDO on either. On the 3D, though, you could do a call + data if on 4G (Wimax), which was and still is, pretty spotty here in Minneapolis-St Paul. Of course, Sprint has been rolling out LTE for a while now. It appears, then disappears a lot. Unfortunately 3G has been awful for months. I will be so thankful when LTE is finally and fully deployed!
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Those devices did not support SVDO. I know the S3 and EVO LTE support it, and possible the Nexus LTE (additionally, the newest Optimus maybe?). I really liked this feature when on the phone and being able to quickly check email or pull up traffic info without relying on WiFi.
The S4 does not support simultaneous voice+data, and I believe that anandtech/ars had good articles describing the data paths employed by the HTC One and S4.
What I found interesting is that when the 4G connection drops out and 3G connects, I can just send a text and get 4G back immediately instead of waiting to hop towers. I suspect that a phone call would serve the same purpose.
Also, toggling 4G off and on will get you back the same mobile IP address. This is not the case with 3G, which results in a new IP address being assigned. In order to get a new IP on LTE, you have to toggle airplane mode (which is likely why this is the first step in troubleshooting LTE connectivity).

Thought I'd help you all out to understand it since you all are sooooo new to having LTE on your phones and all (that was a joke, don't get bent out of shape over it....)
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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Just to be a bit more clear, it was not a sprint decision it is based on Qualcomm's chip design. The s4 krait simply supported svdo out the box and the snapdragon 600 doesn't.

themuffinman said:
Just to be a bit more clear, it was not a sprint decision it is based on Qualcomm's chip design. The s4 krait simply supported svdo out the box and the snapdragon 600 doesn't.
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I am not sure that is correct. First of all, the 600 is the CPU, not the modem - which is a separate component altogether. Secondly, I believe SVDO support is more a factor of the front end RF design being set up to feed multiple transmit paths to the modem, which in the case of the Qualcomm modem, I believe has the necessary additional ports to handle it. However, it would have necessitated a more complex RF design which Sprint and Samsung probably opted to forgo, given that Sprint's is already getting on the LTE bandwagon.

myphone12345 said:
I am not sure that is correct. First of all, the 600 is the CPU, not the modem - which is a separate component altogether. Secondly, I believe SVDO support is more a factor of the front end RF design being set up to feed multiple paths to the modem, which in the case of the Qualcomm modem, I believe has the necessary additional ports to handle it. However, it would have necessitated a more complex RF design which Sprint and Samsung probably opted to forgo, given that Sprint's is already getting on the LTE bandwagon.
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You are absolutely correct but wouldn't that be dependent on whether the modem supported that design?

themuffinman said:
You are absolutely correct but wouldn't that be dependent on whether the modem supported that design?
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My best guess is that the advanced modem in the S4 could handle it, but to add it on top of SVLTE along with the newer MIMO antenna configurations and multi-band transceivers and switches found in the latest LTE capable handsets would require the addition of another RF chain in the device and thus significantly raise the complexity of the design to a degree that doesn't make it worthwhile for Samsung to implement it.

It's not going to happen.... It's a USA cdma limitation it has NOTHING to do with the phone
Sent from my GT-I9505 using xda premium

hyelton said:
It's not going to happen.... It's a USA cdma limitation it has NOTHING to do with the phone
Sent from my GT-I9505 using xda premium
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Yes, for the most part, cdma devices has never been able to do voice and 3g data simultaneously but there is something called svdo which allows supported devices to do just that. The HTC thunderbolt on verizon was one of the first phones to support svdo(simultaneous voice and data over 3g on a cdma network). Getting it to work has absolutely nothing to do with the network but how the phone is designed. Now I am a sprint customer so I don't know what other devices supported it on verizon since but I do know that both sprint and verizon's gs3 both support svdo as well as sprints evo lte and a few other devices.

hyelton said:
It's not going to happen.... It's a USA cdma limitation it has NOTHING to do with the phone
Sent from my GT-I9505 using xda premium
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Not true. There have been several devices that could do it.

myphone12345 said:
Not true. There have been several devices that could do it.
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Oh theres plenty!! of devices that support it!! Its the NETWORK that does not.

hyelton said:
Oh theres plenty!! of devices that support it!! Its the NETWORK that does not.
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You keep talking like the network is preventing it from being possible, yes there are technical obsticals but obviously there are ways around it. So the botton line is, can you have a phone thats on a cdma network that can do voice and 3g data at the same time? That answer is yes

Seriously, why are we arguing this much about this? Simultaneous voice AND 3G on Sprint, yes, period. S3 and Evo LTE do it, S4 doesn't. Let's move on to other things.