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I understand that 2G and 3G has more to do with data speed. However does the voice quality differ between the two??? I can't find much consensus on the subject. Thank you.
unless your operator have strange equipment it would be 100% the same
A wireless communications guy who is a fanatic with cell phones on youtube (aka absalon3) once said that his Nokia E90 kept dropping calls because it did not support the U.S. 3G frequencies at his carrier.
So yes, if you don't have 3G access or subscription, than your phone is more likely to have a weaker signal--hence the dropped calls.
poetryrocksalot said:
A wireless communications guy who is a fanatic with cell phones on youtube (aka absalon3) once said that his Nokia E90 kept dropping calls because it did not support the U.S. 3G frequencies at his carrier.
So yes, if you don't have 3G access or subscription, than your phone is more likely to have a weaker signal--hence the dropped calls.
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i dont think so. gsm 3g devices can have simultaneous voice and data connections 3g and voice are totally separate.
josefcrist said:
i dont think so. gsm 3g devices can have simultaneous voice and data connections 3g and voice are totally separate.
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Check out Absalon3's video:
http://www.youtube.com/watch?v=FNrRNUZfqkQ
He says that the lack of 3G hardware meant that he got dropped calls.
On another video he claims to have a degree on some sort of communications thing. I haven't looked for the video because I don't know which one it is on the top of my head. Anyways it sounded as if his 'degree' made him an expert on cell phones.
I also have a Nokia E90 and the reception isn't as good as my North American version of Xperia X1. However, I do understand that reception is also determined by the other hardware factors.
Well thank you guys, this is why I had trouble finding out definitive info on this. It seems that there are no hard fact, just anecdotal evidences.
I am trying to decide whether I have to go with a higher price Telus HTC Hero (3G on ATT), or I can stick with a cheaper price HTC Hero (2G on ATT). I don't give a crap about data, however, voice is very important, after all it is a phone.
"gsm 3g devices can have simultaneous voice and data connections 3g and voice are totally separate."
not just gsm 3g devices
gsm since gprs (1g) have supported simultaneous voice and data
that is if the operators equipment support it too
had simultaneous data and voice on all my 1g gsm smartphones
Many 3G operators have their 2G service provided by another operator in low coverage areas, so when moving between 3G and 2G and vice versa there can sometimes be line drops.
The actual voice quality between a 2G phone call and a 3G phone call is no different.
Research your desired operator's coverage in your area for both 2G and 3G, then decide.
From what I've seen, and also from the maps on their websites.
If you have a phone with 2G and 3G you have the most coverage.
Now if you have a 2G device you will only have coverage in the 2G area, so if there are places that only have 3G in their area, you will get a dropped call.
This is practically useless for the large decent carriers like AT&T and Verizon who have a lot of coverage. But maybe it's a problem for some other carriers.
Also from the maps it looks like most 2G area have 3G.
Just my .02, I have nothing really to back this up. Best thing you can do is make sure you have good coverage.
ATT's Webpage for Coverage
There are other places where you can find a carriers coverage.
I notice that forcing 2g, calls get that kinda pulsating GSM radio interference noise whereas forcing 3g it does not occur!!!
Anyone else notice this?!!
strung said:
I notice that forcing 2g, calls get that kinda pulsating GSM radio interference noise whereas forcing 3g it does not occur!!!
Anyone else notice this?!!
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i thought 3g, 4g, 2g or what ever was for data purposes only....
laker666 said:
i thought 3g, 4g, 2g or what ever was for data purposes only....
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From what I understand, 4g is 3g, they are HSPA and HSPA+. 2G is GSM. So there are two separate radios in your phone and on the towers.
I just tested this on my phone and can confirm that 3G is a lot less noisier call-quality wise than 2G.
Voice uses 3G as well. TMO throttled back 2G a while back to make 3G faster, so using any phone on 2G mode nowadays is gonna suck more than it would otherwise.
zaventh said:
Voice uses 3G as well. TMO throttled back 2G a while back to make 3G faster, so using any phone on 2G mode nowadays is gonna suck more than it would otherwise.
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if that is the case how come i can turn of my data and stilll make crystal clear phone calls? not saying you are wrong just trying to understand
strung said:
I notice that forcing 2g, calls get that kinda pulsating GSM radio interference noise whereas forcing 3g it does not occur!!!
Anyone else notice this?!!
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Click to collapse
Yep.. 2G / EDGE uses the older GSM data transmission standard, while 3G/4G uses CDMA technology to transmit data.
T-Mobile uses all GSM technology. CDMA is something totally different and is used by Verizon/Sprint in the US.
I'm not a radio engineering expert, but the main difference between 2G and 3G is the protocol. 3G uses more efficient algorithms to compress/decompress the audio (and data) signals. This is the primary reason 3G is faster than 2G to begin with. T-Mobile uses 3G for voice, which means that, in general, calls will LIKELY sound clearly and crisper on 3G than 2G, on average. This is all dependent on network conditions, your 2G signal, your 3G signal, your particular handset, and your own hearing capabilities and preferences. But the idea is like an Mp3 encoding... 3G is 320kbps and 2G is 128kbps... maybe sometimes they sound the same to some people, but technically 3G is "better" under ideal circumstances.
But the 2G throttling I was remembering was actually AT&T, not T-Mobile, though they likely have done something to a similar effect by now.
http://www.ofb.biz/safari/article/512.html
wcdma is 3/4g
zaventh said:
T-Mobile uses all GSM technology. CDMA is something totally different and is used by Verizon/Sprint in the US.
I'm not a radio engineering expert, but the main difference between 2G and 3G is the protocol. 3G uses more efficient algorithms to compress/decompress the audio (and data) signals. This is the primary reason 3G is faster than 2G to begin with. T-Mobile uses 3G for voice, which means that, in general, calls will LIKELY sound clearly and crisper on 3G than 2G, on average. This is all dependent on network conditions, your 2G signal, your 3G signal, your particular handset, and your own hearing capabilities and preferences. But the idea is like an Mp3 encoding... 3G is 320kbps and 2G is 128kbps... maybe sometimes they sound the same to some people, but technically 3G is "better" under ideal circumstances.
But the 2G throttling I was remembering was actually AT&T, not T-Mobile, though they likely have done something to a similar effect by now.
http://www.ofb.biz/safari/article/512.html
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my question is if 2g and 3/4g have any effect on call quality, how can i receive crystal clear call quality with my data turned off. im not sure 2g, 3g, or 4g have any effect on call quality
None of your voice goes through your data connection. The ONLY way there is any difference is if there is some kind of electromagnetic interference from inside the phone caused by 2G and not by 4G.
As stated above, All voice calls and SMS come through without a data connection at all.
r4d14n7 said:
None of your voice goes through your data connection. The ONLY way there is any difference is if there is some kind of electromagnetic interference from inside the phone caused by 2G and not by 4G.
As stated above, All voice calls and SMS come through without a data connection at all.
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Disabling data does not mean you disconnect from the 3G/4G network. Turn mobile data off and then look under Settings>About Phone>Status, and look at Mobile Network Type. You're phone is still connected to UMTS/HSPA/EDGE/GPRS ... or whatever other type of network it was connected to. And you're not connected to both 2G and 3G simultaneously. Its one or the other and all data and phone transmissions are sent over whichever network you're connected to.
phburks said:
Disabling data does not mean you disconnect from the 3G/4G network. Turn mobile data off and then look under Settings>About Phone>Status, and look at Mobile Network Type. You're phone is still connected to UMTS/HSPA/EDGE/GPRS ... or whatever other type of network it was connected to. And you're not connected to both 2G and 3G simultaneously. Its one or the other and all data and phone transmissions are sent over whichever network you're connected to.
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+ 1
Sent from my LG-P999 using XDA App
Ah, fair enough. I was under the impression that voice always went through a GSM connection, whether WCDMA was active or not. Has this changed in the last few years?
r4d14n7 said:
Ah, fair enough. I was under the impression that voice always went through a GSM connection, whether WCDMA was active or not. Has this changed in the last few years?
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Don't think it's ever been that way. Phones will switch from one type of mobile network to another depending on user settings and signal strength, but you're only connected to one type of network at any given time. GSM networks utilize 2G technologies to allow for voice and data, but not simultaneously. GSM networks also utilize 3G/4G technologies to allow voice and data simultaneously.
Here's a good source of info on different technologies used by GSM networks:
http://www.gsmworld.com/technology/index.htm
My bad. Thanks for the link though.
When on 2g my speakers of my surround sound and car audio will make static from the phone... 3g doesn't do this. 2g and 3g are different.
Asus Transformer 3.1 pwnd
www.MiiWiiChat.com
www.SnapSiteAdmins.com
So - on an Android phone, do I need to check "Data Enabled" for the better voice quality, or will the 3G/4G for better voice be enabled by default?
No, enabling or disabling your mobile data connection will not affect call quality directly. Your device will connect to the best network available regardless of data being enabled. The only setting you can look at is your preferred network type under mobile network settings.
on the device the preferred network type is LTE but most of the time it falls back to HSPA mode and not LTE how do you force the LTE mode only? My location get's 3-4 bars for LTE coverage and all 5 bars for HSPA but LTE is faster
Dial *#*#4636#*#* on the keypad and under phone settings there is LTE only. Your phone won't work for calls possibly after you do this and you won't get data outside of an lte area.
Sent from my Nexus 5 using Tapatalk
coorsleftfield said:
Dial *#*#4636#*#* on the keypad and under phone settings there is LTE only. Your phone won't work for calls possibly after you do this and you won't get data outside of an lte area.
Sent from my Nexus 5 using Tapatalk
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Thank You. Yes it did work but changed it back since I need my cell phone to be a cell phone for calls
sillyshyme said:
Thank You. Yes it did work but changed it back since I need my cell phone to be a cell phone for calls
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How do you change it back? Mine keeps reverting back to LTE only and I am unable to make and receive calls.
Did you get calling back?
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sillyshyme said:
on the device the preferred network type is LTE but most of the time it falls back to HSPA mode and not LTE how do you force the LTE mode only? My location get's 3-4 bars for LTE coverage and all 5 bars for HSPA but LTE is faster
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man, i grepped a whole thread in relation to this very issue, it's a very imformitave read on LTE network overlays on legacy & upgrading cellular & the intro to these single chip, single pathed qualcomm snapdrgon families, but it got closed;
the nexus 5 only has one chip to handle all networking, from wifi, voice calls, to bluetooth;
it's doing quadruple duty, a question, what technology are you using, gsm, or cdma?
~edit~
nevermind it, you mentioned hspa, so it is gsm..
i'm reading up on lte to gsm handover right now.. lol
j'vai said:
man, i grepped a whole thread in relation to this very issue, it's a very imformitave read on LTE network overlays on legacy & upgrading cellular & the intro to these single chip, single pathed qualcomm snapdrgon families, but it got closed;
the nexus 5 only has one chip to handle all networking, from wifi, voice calls, to bluetooth;
it's doing quadruple duty, a question, what technology are you using, gsm, or cdma?
~edit~
nevermind it, you mentioned hspa, so it is gsm..
i'm reading up on lte to gsm handover right now.. lol
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5 month old thread that was necro'd
Zepius said:
5 month old thread that was necro'd
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Click to collapse
issue solved?
What does this mean?
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rraicu said:
What does this mean?
Sent from my Nexus 5 using Tapatalk
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Click to collapse
that's what i'd like to know.. lol
necro'd as in meaning; left'd to wither inthe wind, or because it's 5 months old, it's not worth posting to anymore..
that's why i asked if the issue was solved, there's threads, & posted STILL asking about LTE faulty connections scattered all over the place, so i guess the issue isn't solved in relation to this handset..
i'm in the school of thought, that like a car, or any tool one would use, it's best to grasp a critical understanding of what it's being used ON..
(am i wrong in this assessment?)
from there, once you understand the build of your tool, you compare it what it's being used on, with it's pros & cons; heighten it's pros, lessen it's cons..
wen i went to mexico just two weeks ago, i ordered two telcel prepaid sim cards to use for that 5 day stretch, i noticed i only got version 5 sim cards that didn't do lte that telcel provided, i called back & asked why, & was told that yes, telcel DID provide lte, but not in the area i was visiting, the highest i would get was hspa+, & only in mexico city & within cancun proper would lte be utilied..
knowing this, & knowing i would be off the beaten path on the beach & not in the major city, i opted for the cards sent, settling for the highest hpsa+ speeds..
maybe not all of us, but many of us, purchase our vehicles (& phones) based on critical knowledge of the phone & network in unison, **if we want more utilization from our hansets**
remember that scene - http://nilvideos.blogspot.com/2008/09/transporter-bank-robbery_17.html
I don't want to try disabling the hspa and calling without knowing I can flip it back on easily..
Sent from my Nexus 5 using Tapatalk
rraicu said:
I don't want to try disabling the hspa and calling without knowing I can flip it back on easily..
Sent from my Nexus 5 using Tapatalk
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Click to collapse
hey, are you on tmobile?
if so, tmobile's roaming is set within it's sim, *unless you manually select a particular nework*
"The device detects and registers on wireless networks inside T-Mobile’s calling area, but roaming networks are usually restricted to T-Mobile SIM cards. You can manually select a network only in areas where T-Mobile does not own GSM spectrum." - ~attachment~
our nexus 5s use single chip, single pathed radios, only one path is used at one time, right?
on the network side, things can be set up pretty differently -
3.3 SUBSCRIBER DATA ASPECTS: USIM/ISIM
Coexistence of LTE with WCDMA/HSPA and GSM Network requires a smooth transition of home location
register HLR towards HSS based on 3GPP specifications. This also helps in providing next generation
Data Layered Architecture that addresses operator’s needs regarding centralization of subscriber data
used for authentication across multiple layers of the same session.
The SIM/USIM is the security token in 2G/3G networks for authenticating a subscriber in the operator’s
HLR. The USIM will continue to provide user authentication function at the access level to the LTE
network.
However, it is necessary to define a mechanism for service level authentication as well, for services such
as the IMS. The ISIM (an application on the UICC) is defined to hold both the user’s access level
credentials and the IMS Private User Identity that is stored in the HSS. The ISIM enables the user to
authenticate to the LTE operator’s IMS network and access its services.
3.4 ROAMING SCENARIOS
There are two roaming scenarios based on home tunneling compared to home tunneling with the
possibility of local breakout as shown in Figure 9. The 2G/3G networks refer to legacy CS or PC based
accesses like GSM/WCDMA in the network
http://www.4gamericas.org/documents/4G_Americas_Coexistence_of_GSM_HSPA_LTE_May%202011x.pdf
to set up domestic roaming on this type of handset ACTUALLY make you roam moreso on other US networks, even though the sim card is provisioned with what network is OK'd?
we're not talking from an older, dual pathed chip paradigm, when that meant exactly *that*..
these newer phones are different beasts..
Yes I'm on T-Mobile.
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rraicu said:
Yes I'm on T-Mobile.
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Click to collapse
LTE has an all IP backbone, with no circuit switching mechanism, the network would provide that, & from my understanding from reading up on it, wcdma provides the **IP flattening** for voice on the gsm networks, just as ehrpd does for cdma networks..
what would happen if you switch on domestic roaming in -
APN & data settings
To set the Access Point Name (APN) and turn on data settings, follow these steps:
1.From any Home screen, tap the All appsAll Apps.pngicon.
2.Tap Settings.
3.Under 'WIRELESS & NETWORKS," tap More... to display more options.
4.Tap Mobile networks.
5.Check the Data enabled check box.
6.Check the Data roaming check box to receive data when roaming domestically
7.Uncheck the Data roaming check box when roaming internationally to avoid incurring roaming charges.
8.Tap Access Point Names
9.Choose from the following:•MetroPCS - fast.metropcs.com
•T-Mobile GPRS
•T-Mobile GPRS - fast.t-mobile.com
do you think you'd simply, roam on another provider?
i suspect it would aid your phone in it's LTE to GSM voice handling..
i suspect strongly.. setting it to *LTE* in -
Switch 2G / 4G / LTE
To change the band between 2G, 4G, and LTE, follow these steps:
1.From any Home screen, tap the All appsAll Apps.pngicon.
2.Tap Settings.
3.Under 'WIRELESS & NETWORKS," tap More... to display more options.
4.Tap Mobile networks.
5.Tap Preferred Network Selection.
6.Choose from the following:•LTE
•3G
•2G
..........................
on yet another note,, your handset may be functioning more properly than you could imagine; in your OP
"on the device the preferred network type is LTE but most of the time it falls back to HSPA mode and not LTE how do you force the LTE mode only? My location get's 3-4 bars for LTE coverage and all 5 bars for HSPA but LTE is faster"
tmobile's LTE may simply be having issues for a spell, to be worked out at a later date, & you're falling back on hspa+ asa failsafe..
you may not have to change a darn thing..
In the Palo Alto area LTE doesn't always stay on and the HSPA+ does not actually transfer any data. Sometimes hspa+ is on when weak LTE is available. In situations where I want wreak LTE over strong but useless hspa+ I need to force LTE not just prefer it
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Does anyone know if the S5 is tri-band with spark just like the 720T S4 ?
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Yes it is.
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Yep. It's spark enabled. Which I hate because no simultaneous voice and data over LTE
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eyecon82 said:
Yep. It's spark enabled. Which I hate because no simultaneous voice and data over LTE
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I heard it's supposed to be coming sometime around June correct? Trying to remember where I saw I mentioned
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reverepats said:
I heard it's supposed to be coming sometime around June correct? Trying to remember where I saw I mentioned
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yea...sprint hasn't upgraded their network to enable simultaneous voice and LTE with spark....but i heard they are working on....i hope its not region based and they can get all the towers working on it at once
i miss being able to mess around on the internet while on hold
hakeem0996 said:
Does anyone know if the S5 is tri-band with spark just like the 720T S4 ?
Sent from my SPH-L720T using xda app-developers app
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Click to collapse
I have Spark (tri-band) network and Google Fiber in KC. Here are my speedtest results. The top 3 results are GS5 on Google Fiber WiFi, the bottom 3 results on Sprint Spark LTE.
https://dl.dropboxusercontent.com/u/3812896/Pics/Android/GFiber Sprint SG5.png
Why spark being the fastest networks, can't talk and data same time.... Nonsense.
Sent from my SPH-L710 using XDA Premium 4 mobile app
Im not in a spark area but still getting much better 4g speeds than my Note 2. Be it modem or whatever its nice
eyecon82 said:
yea...sprint hasn't upgraded their network to enable simultaneous voice and LTE with spark....but i heard they are working on....i hope its not region based and they can get all the towers working on it at once
i miss being able to mess around on the internet while on hold
Click to expand...
Click to collapse
It has nothing to do with upgrading spark to enable voice and lte, sorry but that is completely wrong. Its device specific and not the network, the reason why its not possible is because there is only one radio path with the current crop of tri-band devices which makes it impossible to have lte and voice at the same time so nothing can be done on the network side to make it work. The reason why it was possible on previous non tri-band devices was because they had more than one radio path. I am sure its possible but maybe it just proved too costly and too inefficient to implement Also keep in mind that none of the other wireless carriers can do voice and lte at the same time. The gs5 on att/tmobile, once a call is initiated will drop lte all together but at least they still have the luxury of hspa to fall back on for data in the mean time.
themuffinman said:
It has nothing to do with upgrading spark to enable voice and lte, sorry but that is completely wrong. Its device specific and not the network, the reason why its not possible is because there is only one radio path with the current crop of tri-band devices which makes it impossible to have lte and voice at the same time so nothing can be done on the network side to make it work. The reason why it was possible on previous non tri-band devices was because they had more than one radio path. I am sure its possible but maybe it just proved too costly and too inefficient to implement Also keep in mind that none of the other wireless carriers can do voice and lte at the same time. The gs5 on att/tmobile, once a call is initiated will drop lte all together but at least they still have the luxury of hspa to fall back on for data in the mean time.
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Click to collapse
Are you sure? Everything I gave read indicates it's a network issue rather than hardware
The s4 didn't have the svdo radio so we lost simultaneous voice and data on 3g and the original s4 could do it without the extra radio
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eyecon82 said:
Are you sure? Everything I gave read indicates it's a network issue rather than hardware
The s4 didn't have the svdo radio so we lost simultaneous voice and data on 3g and the original s4 could do it without the extra radio
Sent from my SM-G900P using Tapatalk
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Click to collapse
Non-triband Sprint LTE phones "supported simultaneous voice and LTE (SVLTE). It could do so with two separate transmission paths from the antennas to the chipset. Voice/texting could run via 1xRTT on one transmission path. LTE could run a separate path, allowing data and voice to be used simultaneously."
"In contrast, Sprint Triband LTE devices do not support two separate transmission paths. They have one path, shared by voice/SMS and data. We were alerted to this months in advance. However, we did not realize that the network would have to run on Circuit Switched Fallback in order for this to work and what the ramifications of this would be."
Source: http://s4gru.com/index.php?/blog/1/...-due-to-circuit-switched-fallback-technology/
It's a very informative and extensive read-up and explains, sadly, what is going on.
LordLugard said:
Non-triband Sprint LTE phones "supported simultaneous voice and LTE (SVLTE). It could do so with two separate transmission paths from the antennas to the chipset. Voice/texting could run via 1xRTT on one transmission path. LTE could run a separate path, allowing data and voice to be used simultaneously."
"In contrast, Sprint Triband LTE devices do not support two separate transmission paths. They have one path, shared by voice/SMS and data. We were alerted to this months in advance. However, we did not realize that the network would have to run on Circuit Switched Fallback in order for this to work and what the ramifications of this would be."
Source: http://s4gru.com/index.php?/blog/1/...-due-to-circuit-switched-fallback-technology/
It's a very informative and extensive read-up and explains, sadly, what is going on.
Click to expand...
Click to collapse
great article and it proves my point that simultaneous voice and data will be available via triband LTE in the future and its a network issue, not phone hardware
"Yes, this is an issue of all Triband devices, as they are dependent on CSFB to be present on the Sprint network in order to be able to use LTE.
The problem is not Triband LTE devices, but rather that the Sprint network is not currently upgraded enough in all places that currently have LTE"
Basically, Switchback Mode needs to be enabled for us to have simultaneous voice and data over LTE
" when a Sprint LTE Triband device is in Sprint LTE coverage it parks only in LTE. And doing so means it cannot transmit calls without Circuit Switched Fallback (CSFB) on the network side. CSFB and eCSFB (Enhanced Circuit Switched Fallback) are network controls that will allow a single mode/single path network to operate in two modes, both CDMA and LTE"
Prior to triband phones, there were 2 radios...one for CDMA, and one for LTE...but now it's all over LTE radio for both calls and data...but not yet enabled, so it can only do 1 at a time currently
---------- Post added at 07:57 AM ---------- Previous post was at 07:09 AM ----------
LordLugard said:
"In contrast, Sprint Triband LTE devices do not support two separate transmission paths. They have one path, shared by voice/SMS and data. We were alerted to this months in advance. However, we did not realize that the network would have to run on Circuit Switched Fallback in order for this to work and what the ramifications of this would be."
Click to expand...
Click to collapse
it says right there in in bold in your quote that you need "Circuit Switched Fallback" to have 2 transmission paths on one radio...but it is not yet enabled
GS5 performs really well on tri-band. I'm getting up to around 40Mbps indoors at home, though I'm just a few blocks from a cellsite. The first 3 results are on Google Gigabit Fiber in KC, the second three are Sprint Spark.
https://dl.dropboxusercontent.com/u/3812896/Pics/Android/GFIber Sprint GS5.png
BTW, more on Google Fiber here...
http://www.dslreports.com/forum/r29157624-Google-Fiber-Kansas-City
eyecon82 said:
Are you sure? Everything I gave read indicates it's a network issue rather than hardware
The s4 didn't have the svdo radio so we lost simultaneous voice and data on 3g and the original s4 could do it without the extra radio
Sent from my SM-G900P using Tapatalk
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Click to collapse
Yes, I am very sure, its in the radio design. Even with previous devices that could do svdo and svlte, it was because of radio design of the hardware and not because of the network.
themuffinman said:
Yes, I am very sure, its in the radio design. Even with previous devices that could do svdo and svlte, it was because of radio design of the hardware and not because of the network.
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Click to collapse
Read post #12. You are wrong, respectfully
yes, there is 1 radio..but spark will allow both voice and data over LTE once switchback mode is enabled, hence allowing 2 channels with 1 radio
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xenokc said:
GS5 performs really well on tri-band. I'm getting up to around 40Mbps indoors at home, though I'm just a few blocks from a cellsite. The first 3 results are on Google Gigabit Fiber in KC, the second three are Sprint Spark.
https://dl.dropboxusercontent.com/u/3812896/Pics/Android/GFIber Sprint GS5.png
BTW, more on Google Fiber here...
http://www.dslreports.com/forum/r29157624-Google-Fiber-Kansas-City
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Click to collapse
Spark in NYC has been a disappointment for me. Haven't seen or noticed any improvements at all (I have an LG G2). Typically test as low as 2Mb to as high as 9Mb usually, which is just fine by me. Fast enough to stream stuff without buffering (most times) but it's just not consistent.
Frankly I'll trade some of that theoretical 40Mbps LTE speeds for better LTE coverage and 3G speeds and the ability to talk and surf over 3G and LTE any day. (I know it's not a big deal for lots of folks but i sure enjoyed it when I had the Galaxy S3 and Note 2).
Definitely jealous of your speeds though.
eyecon82 said:
great article and it proves my point that simultaneous voice and data will be available via triband LTE in the future and its a network issue, not phone hardware
"Yes, this is an issue of all Triband devices, as they are dependent on CSFB to be present on the Sprint network in order to be able to use LTE.
The problem is not Triband LTE devices, but rather that the Sprint network is not currently upgraded enough in all places that currently have LTE"
Basically, Switchback Mode needs to be enabled for us to have simultaneous voice and data over LTE
" when a Sprint LTE Triband device is in Sprint LTE coverage it parks only in LTE. And doing so means it cannot transmit calls without Circuit Switched Fallback (CSFB) on the network side. CSFB and eCSFB (Enhanced Circuit Switched Fallback) are network controls that will allow a single mode/single path network to operate in two modes, both CDMA and LTE"
Prior to triband phones, there were 2 radios...one for CDMA, and one for LTE...but now it's all over LTE radio for both calls and data...but not yet enabled, so it can only do 1 at a time currently
---------- Post added at 07:57 AM ---------- Previous post was at 07:09 AM ----------
it says right there in in bold in your quote that you need "Circuit Switched Fallback" to have 2 transmission paths on one radio...but it is not yet enabled
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I am sorry but I don't think you understand what Robert was trying to say in that article. The reason why its not possible is because there is only one transmission path so its only possible for you to be connected either cdma or lte. The purpose of csfb is to let the tri-band device to know when to actually switch, thats why tri-band devices that are in areas that are not fully upgraded with csfb will have connection issues because it doesn't know when to switch. Simultaneous voice and data will not happen with the current hardware design of tri-band devices regardless of whats done in the network side.
EDIT: And when it talks about csfb is needed, its not needed to be able to do cdma and lte modes at the same time its needed to tell the device when to switch to either cdma or lte.
themuffinman said:
I am sorry but I don't think you understand what AJ was trying to say in that article. The reason why its not possible is because there is only one transmission path so its only possible for you to be connected either cdma or lte. The purpose of csfb is to let the tri-band device to know when to actually switch, thats why tri-band devices that are in areas that are not fully upgraded with csfb will have connection issues because it doesn't know when to switch. Simultaneous voice and data will not happen with the current hardware design of tri-band devices regardless of whats done in the network side.
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it says it right below
" when a Sprint LTE Triband device is in Sprint LTE coverage it parks only in LTE. And doing so means it cannot transmit calls without Circuit Switched Fallback (CSFB) on the network side. CSFB and eCSFB (Enhanced Circuit Switched Fallback) are network controls that will allow a single mode/single path network to operate in two modes, both CDMA and LTE"
themuffinman said:
I am sorry but I don't think you understand what AJ was trying to say in that article. The reason why its not possible is because there is only one transmission path so its only possible for you to be connected either cdma or lte. The purpose of csfb is to let the tri-band device to know when to actually switch, thats why tri-band devices that are in areas that are not fully upgraded with csfb will have connection issues because it doesn't know when to switch. Simultaneous voice and data will not happen with the current hardware design of tri-band devices regardless of whats done in the network side.
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kunundrum78 said:
it says it right below
" when a Sprint LTE Triband device is in Sprint LTE coverage it parks only in LTE. And doing so means it cannot transmit calls without Circuit Switched Fallback (CSFB) on the network side. CSFB and eCSFB (Enhanced Circuit Switched Fallback) are network controls that will allow a single mode/single path network to operate in two modes, both CDMA and LTE"
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yep....read the above....
---------- Post added at 02:36 PM ---------- Previous post was at 02:35 PM ----------
themuffinman said:
EDIT: And when it talks about csfb is needed, its not needed to be able to do cdma and lte modes at the same time its needed to tell the device when to switch to either cdma or lte.
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yea, but it says BOTH...not "either"
"allow a single mode/single path network to operate in two modes, both CDMA and LTE"
kunundrum78 said:
it says it right below
" when a Sprint LTE Triband device is in Sprint LTE coverage it parks only in LTE. And doing so means it cannot transmit calls without Circuit Switched Fallback (CSFB) on the network side. CSFB and eCSFB (Enhanced Circuit Switched Fallback) are network controls that will allow a single mode/single path network to operate in two modes, both CDMA and LTE"
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eyecon82 said:
yep....read the above....
---------- Post added at 02:36 PM ---------- Previous post was at 02:35 PM ----------
yea, but it says BOTH...not "either"
"allow a single mode/single path network to operate in two modes, both CDMA and LTE"
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Come on guys, you don't understand what the article is saying:
"In contrast, a Sprint Triband LTE device can only stay on one technology at a time. CDMA or LTE, not both. So when a Sprint LTE Triband device is in Sprint LTE coverage it parks only in LTE. And doing so means it cannot transmit calls without Circuit Switched Fallback (CSFB) on the network side. CSFB and eCSFB (Enhanced Circuit Switched Fallback) are network controls that will allow a single mode/single path network to operate in two modes, both CDMA and LTE.
Here is how it works in the simplest way I can describe. When your Triband LTE device has an LTE signal, it cannot receive or make calls on its own. It is just using LTE data happily. However, what if someone calls you? How does it get through the CDMA network to your device? Via CSFB.
When the Sprint network tries to forward a call to your device but cannot see it via CDMA, it then checks for an LTE connection to your device. If it sees one, it tells your device to disconnect from LTE for a moment and reconnect to CDMA. Your device then jumps over to take the call on Sprint CDMA and the LTE session is interrupted. This happens very fast and seamlessly. Except for the loss of data availability. If you receive a text, the Sprint network is able to route it to your device via LTE."
When it talks about both cdma and lte modes, its not meaning both at the same time, it means being able to switch between the two seamlessly. Without csfb there will be issues switching back and forth for tri-band devices. In the last paragraph I quoted from s4gru, it tells you right there how it works. When you get a call csfb tells the device what to do so you can get the call, the transition is seamless except for the loss of data availability. Read the whole article not just that sentence.
EDIT: Here is a link to the thread over on s4gru that talks about it in more detail, ask your questions there to see what they say.
http://s4gru.com/index.php?/topic/5001-breaking-band-tri-band-lte-ecsfb-issues-thread/
Hi everyone. Quick question. I searched but didn't find much, but I was wanting to use LTE only (*#*#4636#*#*, Phone, LTE Only), and it does work but on Sprint, it disables 1x and pretends like the phone has no coverage and then does the "Searching for Service" and the battery drains like crazy. Any ideas?
MrObvious said:
Hi everyone. Quick question. I searched but didn't find much, but I was wanting to use LTE only (*#*#4636#*#*, Phone, LTE Only), and it does work but on Sprint, it disables 1x and pretends like the phone has no coverage and then does the "Searching for Service" and the battery drains like crazy. Any ideas?
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That mode disables all voice and texting abilities, I don't think you can use that on a phone, especially not a phone on Sprint.
turn it back, if the phone doesn't think it has a good enough signal to use LTE, trust it and drop to 3G you'll be better off.
Use global setting for Sprint
Sent from my Nexus 5
I don't want 3g though because my phone has the power to get a signal but if it gets down to 1 bar roughly (driving between towers and I'm in a fairly big city so it's not a coverage/reception issue) and it drops to 3g, despite the fact that it'll get stronger if it waits 5 more seconds.
you can not get/make phonecalls on lte only, period. its for data only.
indeed. setting it through the dialer to lte only, makes that lte data channel the only channel, it kills the ehrpd / 1x cdma 200 ip hand-off needed for voice paging to & from the network..
but NOW i know WHY you were forcing lte only via the dialer (didn't know at 1st)
but where you are (if you're on srpint) this is what' was reported happening -
Sprint used to have "same-as-native" 3G service in the western half of Kansas via those carriers, and even used to show it as Native on their coverage maps. Then it changed to Off-Network roaming a couple years ago. They even stopped Native service along I-70 through most of Kansas and eastern Colorado. Sounds like some of those carriers aren't being too accommodating to Sprint nowadays.
via the HoFo App
i didn't know, the hometown of sprint, was having such a hard time covering, it's own home state..
j'vai said:
indeed. setting it through the dialer to lte only, makes that lte data channel the only channel, it kills the ehrpd / 1x cdma 200 ip hand-off needed for voice paging to & from the network..
but NOW i know WHY you were forcing lte only via the dialer (didn't know at 1st)
but where you are (if you're on srpint) this is what' was reported happening -
Sprint used to have "same-as-native" 3G service in the western half of Kansas via those carriers, and even used to show it as Native on their coverage maps. Then it changed to Off-Network roaming a couple years ago. They even stopped Native service along I-70 through most of Kansas and eastern Colorado. Sounds like some of those carriers aren't being too accommodating to Sprint nowadays.
via the HoFo App
i didn't know, the hometown of sprint, was having such a hard time covering, it's own home state..
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That's inaccurate for me as I'm in central KS. That only applies for west KS. I'm in a native market with LTE, NV, and band 25 and 26.
MrObvious said:
I don't want 3g though because my phone has the power to get a signal but if it gets down to 1 bar roughly (driving between towers and I'm in a fairly big city so it's not a coverage/reception issue) and it drops to 3g, despite the fact that it'll get stronger if it waits 5 more seconds.
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ok.. central ks..
what were your settings prior, to lte only?
Just LTE/CDMA. There are times I want to set LTE only so I don't drop 4g. Of course I have service with that setting.
Sent from my Nexus 5 using xda app-developers app
you know, that going via the keypad to set LTE only you'll kill the fall back bridge to 1xrtt voice & evdo 3g, right?
& every time you want to have voice service you'd have to do the toggle to undo LTE only , then when you want it back LTE only ..
you say "you don't want evdo 3g" but the devil in the details are, you'll not have voice service ither, that way..
is it worth that trouble?