Database Users

Lte

Lte requires sim cards right? So hopefully after sprint makes the upgrade to lte, we'll be able to buy sprint phones and use a sim card from any of the big 4! Dream come true in america, emirite?
Sent from my SPH-D700 using XDA App

Sorry, meant we can buy any lte phone unlocked*
Sent from my SPH-D700 using XDA App

That's what I heard. And supposedly it's not the micro ones either.

A_Flying_Fox said:
Lte requires sim cards right? So hopefully after sprint makes the upgrade to lte, we'll be able to buy sprint phones and use a sim card from any of the big 4! Dream come true in america, emirite?
Sent from my SPH-D700 using XDA App
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Not really...AT&T and Verizon are both going FDD-LTE on the 700mhz band...Sprint will get TD-LTE on the 2.5ghz~ range....
T-Mobile is going on their own HSPA/LTE hybrid variant...
So while Verizon and AT&T phones might be interchangeable (assuming they dont lock them say via some other method)..Sprint and T-Mobile will not be part of that...

gTen said:
Not really...AT&T and Verizon are both going FDD-LTE on the 700mhz band...Sprint will get TD-LTE on the 2.5ghz~ range....
T-Mobile is going on their own HSPA/LTE hybrid variant...
So while Verizon and AT&T phones might be interchangeable (assuming they dont lock them say via some other method)..Sprint and T-Mobile will not be part of that...
Click to expand...
Click to collapse
.......my heart.
Sent from my SPH-D700 using XDA App

gTen said:
Not really...AT&T and Verizon are both going FDD-LTE on the 700mhz band...Sprint will get TD-LTE on the 2.5ghz~ range....
T-Mobile is going on their own HSPA/LTE hybrid variant...
So while Verizon and AT&T phones might be interchangeable (assuming they dont lock them say via some other method)..Sprint and T-Mobile will not be part of that...
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So which one would be better?

musclehead84 said:
So which one would be better?
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Better in terms of?

musclehead84 said:
So which one would be better?
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Verizons lte is on par with wimax so i assume that sprints would be better when they get it
Sent from my SPH-D700 using XDA App

And higher spectrum means better building penetration, right?
Sent from my SPH-D700 using XDA App

A_Flying_Fox said:
.......my heart.
Sent from my SPH-D700 using XDA App
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Well its not impossible for a device to support both TD-LTE and FD-LTE on a single chipset..but we would then have to buy international phones..cause knowing carriers they either won't include those bands or lock them :/
A_Flying_Fox said:
And higher spectrum means better building penetration, right?
Sent from my SPH-D700 using XDA App
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700mhz is better building penetration over 2.5ghz..BUT how TD-LTE is allows carriers to use more spectrum...right now AT&T and Verizon plan to run it in 20mhz worth of spectrum each..realistically speaking that would constrain quantity of users/amount of data...(hence the tiered data)
Sprint right now though is running wimax in 10mhz of spectrum though..and could run it in 30mhz if they please..
So realistically speaking its easier to run TD-LTE as more spectrum is available in comparison to FD-LTE running at the limited 700mhz spectrum..while 700mhz spectrum though will offer betetr building penetration/signal

gTen said:
Well its not impossible for a device to support both TD-LTE and FD-LTE on a single chipset..but we would then have to buy international phones..cause knowing carriers they either won't include those bands or lock them :/
700mhz is better building penetration over 2.5ghz..BUT how TD-LTE is allows carriers to use more spectrum...right now AT&T and Verizon plan to run it in 20mhz worth of spectrum each..realistically speaking that would constrain quantity of users/amount of data...(hence the tiered data)
Sprint right now though is running wimax in 10mhz of spectrum though..and could run it in 30mhz if they please..
So realistically speaking its easier to run TD-LTE as more spectrum is available in comparison to FD-LTE running at the limited 700mhz spectrum..while 700mhz spectrum though will offer betetr building penetration/signal
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So its basically the 3g story again lol sprint has the better and same constant speeds no matter the load, but the signal won't be as strong lol. I can deal with that
And buyingunlocked international phones isn't bad...my friend only uses unlocked ones and they always have extra features compared to a branded one... and all he would have to do to activate it was slide his sim card in it. I hate how att/tmo users can effectively use any phone they want...I want this freedom with sprint/verizon
Sent from my SPH-D700 using XDA App

A_Flying_Fox said:
So its basically the 3g story again lol sprint has the better and same constant speeds no matter the load, but the signal won't be as strong lol. I can deal with that
Sent from my SPH-D700 using XDA App
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Sprint's LTE will act like the current Wimax implementation because it'll be running at 2.5ghz. We all know how spotty it is, especially when indoors.
Verizon and AT&T, at 700mhz will act their current 3G service because it's very close to 800mhz. They'll probably have an easier time getting better coverage because they know the 800mhz frequency.
Personally, I'd rather be at 700mhz for LTE, at 2.5ghz, you lose to much coverage and I'm sure Verizon already has the limited bandwidth figure out. If they didn't they could be throwing billions of dollars down the tube.
I can't wait for Verizon handsets to hit the market. My Sprint contract just expired so I'm looking to jump ship.

A_Flying_Fox said:
So its basically the 3g story again lol sprint has the better and same constant speeds no matter the load, but the signal won't be as strong lol. I can deal with that
And buyingunlocked international phones isn't bad...my friend only uses unlocked ones and they always have extra features compared to a branded one... and all he would have to do to activate it was slide his sim card in it. I hate how att/tmo users can effectively use any phone they want...I want this freedom with sprint/verizon
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Well yes and no..thing is most international phones dont have the AT&T 3g band and don't have AWS (most common t-mobile 3g band) on same band as T-Mobile
crabjoe said:
Sprint's LTE will act like the current Wimax implementation because it'll be running at 2.5ghz. We all know how spotty it is, especially when indoors.
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Click to collapse
As I said its spotty because right now..
1) sprint is using only 10mhz of spectrum...
2) They are doing minimum deployments..aka the need mroe towers but being cheap...
Verizon and AT&T, at 700mhz will act their current 3G service because it's very close to 800mhz. They'll probably have an easier time getting better coverage because they know the 800mhz frequency.
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Click to collapse
um..what?!?!
Personally, I'd rather be at 700mhz for LTE, at 2.5ghz, you lose to much coverage and I'm sure Verizon already has the limited bandwidth figure out. If they didn't they could be throwing billions of dollars down the tube.
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Yes its called Tiered Data plans...not fun...

Anyway, wouldn't the first crop of Verizon LTE phones still rely on 1x for voice and 3G EVDO/LTE for data?
So basically we're going to have a scenario where a Verizon LTE phone would be something like this CDMA 2000 1x/1900mhz EVDO/700mhz LTE,
and
an ATT LTE phone might be like Quad band GSM/GPRS/EDGE/UMTS 1900 (HSPA?)/700mhz LTE?

My 2 cents vzw & att are double what we pay for a premium phone service on sprint and not unlimited anything also have bad coverage. They nickel & dime the crap out of you on top of it. Also wimax has voice calling capabilities not just data. Lte for some reason can only do data. So maybe some new features with voice calling with wimax.
Viper Rom

jbadboy2007 said:
My 2 cents vzw & att are double what we pay for a premium phone service on sprint and not unlimited anything also have bad coverage. They nickel & dime the crap out of you on top of it. Also wimax has voice calling capabilities not just data. Lte for some reason can only do data. So maybe some new features with voice calling with wimax.
Viper Rom
Click to expand...
Click to collapse
Wimax for voice calling? I find that scary. In its current iteration its flaky enough just for data. I shudder to think how crappy voice calling would be on it. They seriously need to build it out a ton more. I walk in my house signal disappears....not encouraging.

LordLugard said:
Wimax for voice calling? I find that scary. In its current iteration its flaky enough just for data. I shudder to think how crappy voice calling would be on it. They seriously need to build it out a ton more. I walk in my house signal disappears....not encouraging.
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At least you are lucky enough to have coverage...

Wimax doesnt do voice.....on the other hand, att and tmo 3g is voice/data
Sent from my SPH-D700 using XDA App

Yes, the specifications for Voice over LTE have not been finished yet.
LordLugard said:
Wimax for voice calling? I find that scary. In its current iteration its flaky enough just for data. I shudder to think how crappy voice calling would be on it. They seriously need to build it out a ton more. I walk in my house signal disappears....not encouraging.
Click to expand...
Click to collapse
Sprint is working on making a seamless radio..aka unlike now where you need to enable/disable 4g it would work in a way that even if 4g is disconnected your session would not be interrupted...same for calls..

LTE doesn't require a SIM card...Verizon is CDMA

HTC Thunderbolt Voice/Data simultaneously over 3G?

what!!!!?!?!!?
Thunderbolt review
http://www.bgr.com/2011/03/28/htc-thunderbolt-review/
The HTC ThunderBolt is able to send and receive data and carry voice calls simultaneously. It the first of many Verizon Wireless smartphones that will be able to carry voice calls while moving data, and it can do so over Verizon’s new 4G LTE network as well as its older 3G EVDO network. I tested this capability a great deal over the past week, and it has worked flawlessly for me. Whether connected to 3G or 4G, apps and web pages on the ThunderBolt continue to hustle along while voice calls are being made. I’m not sure if this new technology plays a role in the noticeably degraded audio quality I noted above, but the functionality is there so and many users will be elated.
either i am miss understanding this part or verizon enabled something to allow voice/data over their 3g cdma network

IceCreaMan said:
what!!!!?!?!!?
Thunderbolt review
http://www.bgr.com/2011/03/28/htc-thunderbolt-review/
The HTC ThunderBolt is able to send and receive data and carry voice calls simultaneously. It the first of many Verizon Wireless smartphones that will be able to carry voice calls while moving data, and it can do so over Verizon’s new 4G LTE network as well as its older 3G EVDO network. I tested this capability a great deal over the past week, and it has worked flawlessly for me. Whether connected to 3G or 4G, apps and web pages on the ThunderBolt continue to hustle along while voice calls are being made. I’m not sure if this new technology plays a role in the noticeably degraded audio quality I noted above, but the functionality is there so and many users will be elated.
either i am miss understanding this part or verizon enabled something to allow voice/data over their 3g cdma network
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Verizon is implementing SVDO which allows voice and data simultaneously. Its an evolution of EVDO.

Happy to hear it...just ordered my tbolt. Should be here tomorrow. I never used the feature but since i can now....im sure i will use it alot.

Thats pretty neat....but it sucks that you cant turn off 4g....and battery life using LTE and the Thunderbolt seems to be on par with Wimax and the Evo.

TonyArmstrong said:
Verizon is implementing SVDO which allows voice and data simultaneously. Its an evolution of EVDO.
Click to expand...
Click to collapse
My touch, pro 2 had svdo
Sent from my Evo, ho!

skillzo1 said:
Happy to hear it...just ordered my tbolt. Should be here tomorrow. I never used the feature but since i can now....im sure i will use it alot.
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Click to collapse
You canceled your sprint account?
Sent from my Evo, ho!

TonyArmstrong said:
Verizon is implementing SVDO which allows voice and data simultaneously. Its an evolution of EVDO.
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Ahh sweet! Come on Sprint

DarkManX4lf said:
Thats pretty neat....but it sucks that you cant turn off 4g....and battery life using LTE and the Thunderbolt seems to be on par with Wimax and the Evo.
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Click to collapse
Most ppl have been using the app "Phone Info" from the market to force the phone to use CDMA/EvDO data which turns of the 4g radio

Later today i am...waiting for my tbolt in the mail. Im tired of sprints data issues.
JUST2SUAVE said:
You canceled your sprint account?
Sent from my Evo, ho!
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It's the same as turning on your 4G, getting on the internet and the talking on the phone. Come one use your common sense.

Sean-El said:
It's the same as turning on your 4G, getting on the internet and the talking on the phone. Come one use your common sense.
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You can do the same with wifi
Sent from my Evo, ho!

JUST2SUAVE said:
You can do the same with wifi
Sent from my Evo, ho!
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Werd.....
S

Sean-El said:
It's the same as turning on your 4G, getting on the internet and the talking on the phone. Come one use your common sense.
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Click to collapse
Except that you can find ways of turning off LTE and using just EVDO, saving battery and the annoyance of having to constantly turn on WiMax.

Sean-El said:
It's the same as turning on your 4G, getting on the internet and the talking on the phone. Come one use your common sense.
Click to expand...
Click to collapse
JUST2SUAVE said:
You can do the same with wifi
Sent from my Evo, ho!
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Both of you missed the boat...duh try voice and data at the sametime in an area where there is no 4g or WiFi and see if it works for ya. The answer is no but apparently Verizon is learning that users want this feature and has been enabling it on certain devices. Now we just need sprint to follow

IceCreaMan said:
Both of you missed the boat...duh try voice and data at the sametime in an area where there is no 4g or WiFi and see if it works for ya. The answer is no but apparently Verizon is learning that users want this feature and has been enabling it on certain devices. Now we just need sprint to follow
Click to expand...
Click to collapse
You might need to check that boat schedule, yourself. The 3G and LTE antennas/radios are separate, just like Sprint's 3G and 4G. So, if you live on a market that Verizon has yet to light up their LTE and you'll be in the same boat.
I would hazard a guess that the reason you've not seen either Verizon or Sprint actually promote simultanious voice/data as AT&T does is that it's limited to markets where they've lit up LTE/4G.
.....

Vegasden said:
You might need to check that boat schedule, yourself. The 3G and LTE antennas/radios are separate, just like Sprint's 3G and 4G. So, if you live on a market that Verizon has yet to light up their LTE and you'll be in the same boat.
I would hazard a guess that the reason you've not seen either Verizon or Sprint actually promote simultanious voice/data as AT&T does is that it's limited to markets where they've lit up LTE/4G.
.....
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Click to collapse
That's assuming that this isn't SVDO which is 3G/EVDO and completely unrelated to LTE.
Sent from my PC36100 using Tapatalk

Award Tour said:
That's assuming that this isn't SVDO which is 3G/EVDO and completely unrelated to LTE.
Sent from my PC36100 using Tapatalk
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This is exactly what's going on.
Verizon is rolling out SVDO, as I mentioned earlier. Proof comes from the following link: http://pocketnow.com/tech-news/simultaneous-voice-data-coming-to-cdma
It can be -- and is apparently being -- done.

IceCreaMan said:
Both of you missed the boat...duh try voice and data at the sametime in an area where there is no 4g or WiFi and see if it works for ya. The answer is no but apparently Verizon is learning that users want this feature and has been enabling it on certain devices. Now we just need sprint to follow
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Click to collapse
Area with no wifi? If I'm in my house I have it. or in any cafe also
Sent from my Evo, ho!

JUST2SUAVE said:
Area with no wifi? If I'm in my house I have it. or in any cafe also
Sent from my Evo, ho!
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A whole two places? Amazing.
Sent from my PC36100 using Tapatalk

Award Tour said:
A whole two places? Amazing.
Sent from my PC36100 using Tapatalk
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Every where in my city has wifi, you must live in a cave or the mountains.
Sent from my Evo, ho!

talk and internet at the same time?

So anybody heard about the new evo update allowing them to talk and be on the internet at the same time?

Haven't heard anything about that, have been able to do that if using 4G or WiFi.
Sent from my PC36100 using XDA App

It is a limitation with CDMA technology. You can talk and be on 4G or WIFI but not 3G.

tgruendler said:
It is a limitation with CDMA technology. You can talk and be on 4G or WIFI but not 3G.
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Yup , Verizon made it possible on thunderbolt cause it got 2 antennas or something like that
Sent from my PC36100 using Tapatalk

jgalan14 said:
Yup , Verizon made it possible on thunderbolt cause it got 2 antennas or something like that
+1 i hope sprint comes out with this kinda phone
Sent from my PC36100 using XDA Premium App
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You could probably do that with groove ip and ur Google number, u would just chew up data opposed u minutes, I have only used this over WiFi, but it should work over 3g also
Sent from my Misfit Speedy Evo using the XDA app

bring it!!!!!!!!!!!!!!

I read a discussion about this once before. Basically they said that due to limitations in cdma tech, it most likely won't happen unless the phone has separate transceiver chips.
That's what they said, not what I'm saying, lol

Mark_Hardware said:
I read a discussion about this once before. Basically they said that due to limitations in cdma tech, it most likely won't happen unless the phone has separate transceiver chips.
That's what they said, not what I'm saying, lol
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Click to collapse
I am moderately surprised this hasn't happened yet. Given that we have a wifi chip, an FM receiver, bluetooth, 3G, 4G...some phones have had FM transceivers as well, NFC, etc....
I am not surprised, however, because bandwidth is very limited...we're not talking back-haul, we're talking actual radio wave space....I'm dying to know what breakthrough will come along to alleviate that.
If anyone wonders why your mobile internet sucks it's oversaturation....not of the back-haul line that connects the cells to the backbone but of the very air itself as allocated. There's only so much physical space in them airs. Too may people, not enough frequencies, bands are too narrow, too many things need their own band.

It isn't a limitation. I used to do this on my Treo 755. Sprint set it up so we can't do this. There are two types of internet packages we can get for our phones and they basically ended the other one. lol.however, not many people knew that. I am getting 2M down and 768up on 3g where I'm at. when my 4g coming? hahaha
But they did it so they could limit what we do.

runcool said:
It isn't a limitation. I used to do this on my Treo 755.
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Click to collapse
HAHA no you didn't. It's a limitation with cdma, you CANNOT use 3g and phone at the same time.

runcool said:
It isn't a limitation. I used to do this on my Treo 755. Sprint set it up so we can't do this. There are two types of internet packages we can get for our phones and they basically ended the other one. lol.however, not many people knew that. I am getting 2M down and 768up on 3g where I'm at. when my 4g coming? hahaha
But they did it so they could limit what we do.
Click to expand...
Click to collapse
I think this is the same guy that came on and said the same thing on the last post that got out of hand.
This is real simple:
CDMA Technology has a limitation that doesn't allow talking and data on the same radio. End of story. No, there isn't a way around it.

tgruendler said:
I think this is the same guy that came on and said the same thing on the last post that got out of hand.
This is real simple:
CDMA Technology has a limitation that doesn't allow talking and data on the same radio. End of story. No, there isn't a way around it.
Click to expand...
Click to collapse
Exactly why WiMaxx 4G was established, to enable that capability.
GSM is only able to achieve this because they have HSPA for the data side if i'm not mistaken.
Sprints already in the works on switching to LTE 4G, I wonder if they can just make it a hybrid WiMaxx/LTE network and have a radio capable of using either...

So when Sprint switches to LTE, will the current 4G phones work still?

There is a newer version of the CDMA spec that allows it, but Sprint hasn't deployed it. It's unclear if they will, and it's unclear whether existing phones could be upgraded to use it if they did.
For now, it's just like it always has been on all CDMA devices...no 3G data while you're on voice.

bkrodgers said:
There is a newer version of the CDMA spec that allows it, but Sprint hasn't deployed it. It's unclear if they will, and it's unclear whether existing phones could be upgraded to use it if they did.
For now, it's just like it always has been on all CDMA devices...no 3G data while you're on voice.
Click to expand...
Click to collapse
Yeah I heard about this on Verizon side
And about 4G working after LTE deploy most likely unless they upgrade you for a free LTE device or a lawsuit lol
Sent from my ADR6400L using Tapatalk

runcool said:
It isn't a limitation. I used to do this on my Treo 755. Sprint set it up so we can't do this. There are two types of internet packages we can get for our phones and they basically ended the other one. lol.however, not many people knew that. I am getting 2M down and 768up on 3g where I'm at. when my 4g coming? hahaha
But they did it so they could limit what we do.
Click to expand...
Click to collapse
No, it is a huge limitation with cdma. Sprint isn't the only one with this limitation.

The tbolt is the only Verizon phone to offer it. It has svdo (?.) Technology. We wont be able to do it with an update.

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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Click to collapse
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.
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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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Click to collapse
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
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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.

Sprint question.

Alright so some people have been confused as to what I'm asking, telling me to use search first, which I have. My question is: is sprints voice signal carried over 1xrtt (2G) or EvDo (3G) I realize my EVO 4GLTE is capable of using voice and data at the same time, and that's not what I'm asking. Thanks!
Sent from my EVO using xda app-developers app

AZ FadeOut said:
Alright so some people have been confused as to what I'm asking, telling me to use search first, which I have. My question is: is sprints voice signal carried over 1xrtt (2G) or EvDo (3G) I realize my EVO 4GLTE is capable of using voice and data at the same time, and that's not what I'm asking. Thanks!
Sent from my EVO using xda app-developers app
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Click to collapse
it's not unless your on wifi or LTE actually, and i wanna say it's carried over 3g although when i send a text message it drops to 1x for a second

The EVO LTE can use 3G and voice at the same time.
Sent from my EVO using xda app-developers app

AZ FadeOut said:
The EVO LTE can use 3G and voice at the same time.
Sent from my EVO using xda app-developers app
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Click to collapse
hmmm, did a little research, touche sir, but it's not really that great
"SV-DO is terrible on battery life, though. It requires activating two separate Tx/Rx antenna structures as CDMA antennas. That means that only 4G LTE devices can do this, since all Sprint 4G LTE devices have EV-DO/LTE antennas. But, because of how inefficient SV-DO is, it eats a little bit over 50% more than the CDMA2000 1X/LTE radio combination would."

The HTC Thunderbolt does EVDO SMS/phonecalls somehow but I forget how.

AZ FadeOut said:
Alright so some people have been confused as to what I'm asking, telling me to use search first, which I have. My question is: is sprints voice signal carried over 1xrtt (2G) or EvDo (3G) I realize my EVO 4GLTE is capable of using voice and data at the same time, and that's not what I'm asking. Thanks!
Sent from my EVO using xda app-developers app
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Sprints CDMA network is, like you said split up into several parts. 1xRTT is for audio transmission and the first generation technology and EvDO which stands for "Evolution: data only" is the second. EvDO only supports data communications, therefore when you make a phone call your radio which is tuned to the 1.25 MHz spectrum changes to 1xRTT. Since your making a call you must be in 1xRTT and therefore cannot be in EvDO frequency to obtain data at the same time. With LTE/WiMax the phones contain a secondary cell radio that can communicate at the same time as the voice call is being made. The same process involves calling while connected to WiFi.
Long story short, a radio in CDMA standards can only act as a voice or a data radio at one point in time. If you have more than one radio then you can connect to different services simultaneously however at a loss to battery life.