Phone doesn't reconnect to LTE after dropping to 3G? - Sprint Galaxy S 5 Q&A, Help & Troubleshooting

Anybody else having this issue? LTE works fine until..it doesn't, and then even if I was getting LTE in the exact same spot, it never jumps back on it. Once it's in 3G, it stays 3G until I restart. Any way to fix this?

drbadass said:
Anybody else having this issue? LTE works fine until..it doesn't, and then even if I was getting LTE in the exact same spot, it never jumps back on it. Once it's in 3G, it stays 3G until I restart. Any way to fix this?
Click to expand...
Click to collapse
You are in a area where they have not fixed circuit fallback. ... they made the phone do this so you would get calls and text ... triband phones use cfbs to push through calls so if your connected to lte you will not get calls and text.
Read this it will explain much betterhttp://s4gru.com/index.php?/blog/1/...-due-to-circuit-switched-fallback-technology/
Sent from my SM-G900P using Xparent BlueTapatalk 2

Epix4G said:
You are in a area where they have not fixed circuit fallback. ... they made the phone do this so you would get calls and text ... triband phones use cfbs to push through calls so if your connected to lte you will not get calls and text.
Read this it will explain much betterhttp://s4gru.com/index.php?/blog/1/...-due-to-circuit-switched-fallback-technology/
Sent from my SM-G900P using Xparent BlueTapatalk 2
Click to expand...
Click to collapse
I get what you're saying, but I don't believe that's it-- I stay on 4G most of the time, but once I get a call and it shifts me back to 3G, it never moves me back to 4G after the call. It just sits on 3G until I cycle airplane mode or restart the phone.

drbadass said:
I get what you're saying, but I don't believe that's it-- I stay on 4G most of the time, but once I get a call and it shifts me back to 3G, it never moves me back to 4G after the call. It just sits on 3G until I cycle airplane mode or restart the phone.
Click to expand...
Click to collapse
The article listed is the problem your having. You are not the only one and calling Sprint is a waste of time as most dont know what your talking about.
Sent from my SM-G900P using xda app-developers app

pastert33 said:
The article listed is the problem your having. You are not the only one and calling Sprint is a waste of time as most dont know what your talking about.
Sent from my SM-G900P using xda app-developers app
Click to expand...
Click to collapse
Actually, if you read, it's not. If I wasn't in a CSFB market, then I wouldn't connect to LTE at all except for a moment, and then drop off. I do connect to LTE, and receive calls without a problem. But let's say I pick up my phone and walk into another room where the LTE signal isn't as good, and my phone drops to 3G-- when I come back to the good LTE reception room, it should reconnect, like my previous phone would. Instead, it doesn't. It has nothing to do with CSFB.

drbadass said:
Actually, if you read, it's not. If I wasn't in a CSFB market, then I wouldn't connect to LTE at all except for a moment, and then drop off. I do connect to LTE, and receive calls without a problem. But let's say I pick up my phone and walk into another room where the LTE signal isn't as good, and my phone drops to 3G-- when I come back to the good LTE reception room, it should reconnect, like my previous phone would. Instead, it doesn't. It has nothing to do with CSFB.
Click to expand...
Click to collapse
Ok well good luck getting help fixing this problem with an atittude like that. Since I've had this phone, I mostly see 3G but with my S4, I never saw 3G. I can get it to be on LTE all day long when det to LTE only. Its something to do with 3G/LTE hand off and the single band data/voice radio.
Sent from my SM-G900P using xda app-developers app

pastert33 said:
Ok well good luck getting help fixing this problem with an atittude like that. Since I've had this phone, I mostly see 3G but with my S4, I never saw 3G. I can get it to be on LTE all day long when det to LTE only. Its something to do with 3G/LTE hand off and the single band data/voice radio.
Sent from my SM-G900P using xda app-developers app
Click to expand...
Click to collapse
My "attitude" was simply to correct you, since you either didn't read the article or didn't understand what I'm talking about.
I can agree it's probably something to do with the hand-off and/or the radio/how aggressively it decides to change connections, but that's not CSFB.

drbadass said:
Anybody else having this issue? LTE works fine until..it doesn't, and then even if I was getting LTE in the exact same spot, it never jumps back on it. Once it's in 3G, it stays 3G until I restart. Any way to fix this?
Click to expand...
Click to collapse
try clicking airplane mode, and then back off...that should reset it
i randomly run into this...but most of the time it gains LTE

Related

Poor reception on S3 somewhat fixed

So let me start off by saying I have pretty bad reception at home with 4g.
I had an iphone 4 with a 3g range extender before I got the S3 and it worked great.
Found a free app called phone info
Went in under device information, selected cdma auto (PRL). I restarted my phone.
I now have 5 bars and perfect clarity.
*** I must have been on another planet with this post...
gingi999 said:
Went in under device information, selected cdma auto (PRL). I restarted my phone.
I now have 5 bars and perfect clarity.
Click to expand...
Click to collapse
You get 4g in CDMA auto (PRL) mode?
gingi999 said:
So let me start off by saying I have pretty bad reception at home with 4g.
I had an iphone 4 with a 3g range extender before I got the S3 and it worked great.
Found a free app called phone info
Went in under device information, selected cdma auto (PRL). I restarted my phone.
I now have 5 bars and perfect clarity.
Click to expand...
Click to collapse
I am usually about 2 bars where I am. Making this switch didn't change my number of bars or dbm. I'm glad it worked for you however.
I expect by making this change, you are basically downgrading to 3G until you set it back.
If you have a network extender for 3G then that's the fix. Not turning on thst option.
mtnmeow said:
You get 4g in CDMA auto (PRL) mode?
Click to expand...
Click to collapse
It switches to 3G
michael* said:
I am usually about 2 bars where I am. Making this switch didn't change my number of bars or dbm. I'm glad it worked for you however.
I expect by making this change, you are basically downgrading to 3G until you set it back.
Click to expand...
Click to collapse
I am downgrading to 3G and my range extender only works for 3G not 4g. Verizon claims to not have a 4g extender yet.
Elite49 said:
If you have a network extender for 3G then that's the fix. Not turning on thst option.
Click to expand...
Click to collapse
Not exactly. The phone will stay in 4g with one bar even if 5 bars of 3G is available. So forcing the phone to switch to 3G is the only way I got the call quality I needed to make calls in my house
What's the make and model of this range extender?
Sent from my SCH-I535 using Tapatalk 2
Unstable 3G performance
So I've had my S3 for a little over a month and have noticed the poor call reception that people have mentioned,especially in my office building. My old droid 2 global never had a problem, but when I receive calls on the S3 i have to walk to A window down the hall to keep the call from dropping. In an attempt to stay on the more stable 3G coverage in the area I installed phone tools and forced 3G. The problem I have now is that when I'm out of the office or house and not on wifi, I pull the phone put of my pocket to check something and there is no data connection at all now. Even if I open my browser and try to force a connection I get nothing. If I set the radio back to include LTE I have a reliable data connection everywhere but my calls are still poor.
Am i missing something when setting the phone to be 3G only? Thanks.
Ok i tried that phone info program and set it tup cdma auto or whatever, and no improvement. How do i get back to stock? I tried setting to lte/cdma/evdo but it does not stick. I tried uninstalling the program and the phone would stick to 3g. Help!
hypertek said:
Ok i tried that phone info program and set it tup cdma auto or whatever, and no improvement. How do i get back to stock? I tried setting to lte/cdma/evdo but it does not stick. I tried uninstalling the program and the phone would stick to 3g. Help!
Click to expand...
Click to collapse
Just download the phone info app and switch it back to lte/CDMA/evdo when you switch it turn off the radio at the bottom and wait for a couple secs then turn it back on
Sent from my SCH-I535 using xda app-developers app
I wish Verizon and Samsung would just get together and try and resolve why their phones don't work well on Verizon's network. I figured they'd learn what they did wrong with the Nexus - pretty upset they never resolved it with the S3. I'm hoping the DNA/DLX from HTC doesn't have this issue. I liked the Samsung S3 in just about every way but the reception is wretched compared to Motorola phones.
yea I agree...the reception is awful. Literally can't use the phone for business. Everything else about it is awesome though
gingi999 said:
Not exactly. The phone will stay in 4g with one bar even if 5 bars of 3G is available. So forcing the phone to switch to 3G is the only way I got the call quality I needed to make calls in my house
Click to expand...
Click to collapse
I'm missing something. How does 3g/4g have anything to do with your calls? The phone works with data turned off. Are you using Skype?
sincerity said:
yea I agree...the reception is awful. Literally can't use the phone for business. Everything else about it is awesome though
Click to expand...
Click to collapse
I've pretty much given up on Samsung and Verizon as much as I love the phone as a PDA, as a phone it sucks.
sincerity said:
yea I agree...the reception is awful. Literally can't use the phone for business. Everything else about it is awesome though
Click to expand...
Click to collapse
It has to do more with your location I think..I work in the tri-county are of Detroit and my reception is excellent. Had a Cappy on ATT before my GS3 on Verizon and could not even get a signal in our office building..now on Verizon I'm at least 4 bars and full strength pretty much everywhere else..
Tyggy said:
It has to do more with your location I think..I work in the tri-county are of Detroit and my reception is excellent. Had a Cappy on ATT before my GS3 on Verizon and could not even get a signal in our office building..now on Verizon I'm at least 4 bars and full strength pretty much everywhere else..
Click to expand...
Click to collapse
It seems to have to do with the technology of the Verizon towers in your area. In LA with a motorola phone I lock on no problem and get great reception. With the S3 you'll switch from 4 bars - drop the call and switch back to 4 bars even when stationary. Motorolas don't have that issue with Verizon's network. I know several people with the S3 including people in CT and TX - all having the same issue on Verizon's network.
mysterysauce said:
Just download the phone info app and switch it back to lte/CDMA/evdo when you switch it turn off the radio at the bottom and wait for a couple secs then turn it back on
Sent from my SCH-I535 using xda app-developers app
Click to expand...
Click to collapse
ok thanks, i tried this, and still seems to be stuck.
boe said:
I wish Verizon and Samsung would just get together and try and resolve why their phones don't work well on Verizon's network. I figured they'd learn what they did wrong with the Nexus - pretty upset they never resolved it with the S3. I'm hoping the DNA/DLX from HTC doesn't have this issue. I liked the Samsung S3 in just about every way but the reception is wretched compared to Motorola phones.
Click to expand...
Click to collapse
+1000 on Verizon and Sammy needing to fix this
Sent from my SCH-I535 using Xparent Red Tapatalk 2

Disable LTE without custom ROM?

I have the ATT HOX and want to disable LTE due to the known issues with missed calls etc. Would it be possible to disable it through root access WITHOUT installing a custom ROM?
I'm not sure what AT&T do to their phones but can you not change it via Settings > Mobile Network > Network mode.
Sent from my HTC One XL using xda premium
thejosh86 said:
I'm not sure what AT&T do to their phones but can you not change it via Settings > Mobile Network > Network mode.
Sent from my HTC One XL using xda premium
Click to expand...
Click to collapse
That's how it's done on my Rogers device.. should be the same on all.
this_is_nick6 said:
That's how it's done on my Rogers device.. should be the same on all.
Click to expand...
Click to collapse
Same on Telstra
Phone: HTC One XL
ROM: AOKP 4.2.1 MR1 preview w/ alloy blue theme
Launcher: Apex w/glaskart icons
Att one x doesn't have that function. Try to do it in service menu trying typing in *#*#4636#*#*
Go to phone info and scroll down. It works for me on clean Rom but not sure about stock rom
a670 said:
I have the ATT HOX and want to disable LTE due to the known issues with missed calls etc. Would it be possible to disable it through root access WITHOUT installing a custom ROM?
Click to expand...
Click to collapse
What known missed calls issue? What would LTE have to do with missed calls? LTE on AT&T is data only. It doesn't do anything with calls. You can dial *#*#4636#*#* and try to set it to gsm only or something.
Sent from my One X using Tapatalk 2
Believe me I have tried. It's not possible. But ik you said you didn't want to, but you really should look into custom ROMs. There's some that are basically stock with just better battery
Except for ATT. Its a well documented fact that they have it disabled. Any changes you make revert back to default.
this_is_nick6 said:
That's how it's done on my Rogers device.. should be the same on all.
Click to expand...
Click to collapse
Its a fairly well known issue with ATT and LTE phones.
As far as I can tell since LTE IS data only it has a hard time receiving calls when its connected to the LTE network. I think it has something to do with only having 1 antenna and it cant communicate on voice and data at the same time. Or, maybe not.:silly: All I know is that when my phone is connected to LTE I will not receive phone calls. All calls will ring a few times and then go to voice mail. I eventually get voice message notifications when the phone switches out of LTE.
Any changes made in the field test mode do not stick. Thank you very much ATT.
pside15 said:
What known missed calls issue? What would LTE have to do with missed calls? LTE on AT&T is data only. It doesn't do anything with calls. You can dial *#*#4636#*#* and try to set it to gsm only or something.
Sent from my One X using Tapatalk 2
Click to expand...
Click to collapse
a670 said:
Its a fairly well known issue with ATT and LTE phones.
As far as I can tell since LTE IS data only it has a hard time receiving calls when its connected to the LTE network. I think it has something to do with only having 1 antenna and it cant communicate on voice and data at the same time. Or, maybe not.:silly: All I know is that when my phone is connected to LTE I will not receive phone calls. All calls will ring a few times and then go to voice mail. I eventually get voice message notifications when the phone switches out of LTE.
Any changes made in the field test mode do not stick.
Click to expand...
Click to collapse
I've had 3 different LTE phones on AT&T and never had issues with missed calls and I'm constantly on a LTE connection. My phone kicks to hspa+ right before I receive a call and then it rings. Goes back to LTE about 30 seconds after I hang up. The only thing I can think of is that you are on LTE only in the field test mode thing. That will definitely give you call problems. What does it say that you are connected to when you go into the phone information menu?
Sent from my One X using Tapatalk 2
pside15 said:
I've had 3 different LTE phones on AT&T and never had issues with missed calls and I'm constantly on a LTE connection. My phone kicks to hspa+ right before I receive a call and then it rings. Goes back to LTE about 30 seconds after I hang up. The only thing I can think of is that you are on LTE only in the field test mode thing. That will definitely give you call problems. What does it say that you are connected to when you go into the phone information menu?
Sent from my One X using Tapatalk 2
Click to expand...
Click to collapse
I've had a few LTE phones too but I can confirm that this is an issue with AT&T and the HOX. (At least in certain areas.) The phone is *supposed* to do what you said and switch off LTE when a call comes in but that doesn't always happen. I've noticed it the most at my office where I usually have 4 bars of "4G LTE" or one or two bars of "4G". I'll have a long period of time with no incoming calls or texts and then when I make a call (and the phone switches to "4G") I get the backlog of voicemails and text messages. Hard resets haven't helped and AT&T refuses to admit that it's a problem.
Heres a summary of what I have found:
1 Being in field test mode does not affect incoming calls.
2. When making outgoing phone calls with LTE or HSPA displayed in field test mode, the connection will switch to UMTS and then revert back to LTE or HSPA after hanging up. I dont know what that means, just throwing it out there.
3. On a few occasions during my testing I have noticed that I could not receive calls when HSPA is displayed in field test mode. I think that the phone had just switched from LTE, although I havent been able to 100% verify that.
4. My connection at my house varies between LTE, HSPA,EDGE.
5. EDGE is great. My phone makes and receives calls all day long when I have a EDGE connection.
6. Most of my testing has been at home where I have crappy reception to begin with. On a few occasions when I had my wife with me I had her call my phone(connected to LTE). Same as when at home, my pone never rings.
pside15;36112809]I've had 3 different LTE phones on AT&T and never had issues with missed calls and I'm constantly on a LTE connection. My phone kicks to hspa+ right before I receive a call and then it rings. Goes back to LTE about 30 seconds after I hang up. The only thing I can think of is that you are on LTE only in the field test mode thing. That will definitely give you call problems. What does it say that you are connected to when you go into the phone information menu?
Sent from my One X using Tapatalk 2[/QUOTE]
ITNV said:
I've had a few LTE phones too but I can confirm that this is an issue with AT&T and the HOX. (At least in certain areas.) The phone is *supposed* to do what you said and switch off LTE when a call comes in but that doesn't always happen......".
Click to expand...
Click to collapse
Exactly!
I have Samsung Galaxy S3 on AT&T and I have same issue when connected to LTE. I have been working with AT&T CSR for over a week and no resolution yet. I have talked them into switching my data plan from 300MB LTE to Unlimited Standard Phone data plan. (Unlimited standard phone data plan uses HSPA+ and not LTE, which would resolve the issue)
From what I have understood so far, its not the phone, its the AT&T LTE network.
Wouldnt people with the same phone have more answers for you?
Sent from my HTC One XL
Who are you talking to
954wrecker said:
Wouldnt people with the same phone have more answers for you?
Sent from my HTC One XL
Click to expand...
Click to collapse
AlwaysNoob said:
I have Samsung Galaxy S3 on AT&T and I have same issue when connected to LTE. I have been working with AT&T CSR for over a week and no resolution yet. I have talked them into switching my data plan from 300MB LTE to Unlimited Standard Phone data plan. (Unlimited standard phone data plan uses HSPA+ and not LTE, which would resolve the issue)
From what I have understood so far, its not the phone, its the AT&T LTE network.
Click to expand...
Click to collapse
I didnt even know that kind of plan existed. Have you switched over yet? Does it work?:fingers-crossed:
a670 said:
I have the ATT HOX and want to disable LTE due to the known issues with missed calls etc. Would it be possible to disable it through root access WITHOUT installing a custom ROM?
Click to expand...
Click to collapse
Have you tried this? http://forum.xda-developers.com/showpost.php?p=27732183&postcount=8
954wrecker said:
Wouldnt people with the same phone have more answers for you?
Sent from my HTC One XL
Click to expand...
Click to collapse
No, because this issue is not related to the phone but its related to AT&T LTE network. So everyone on AT&T LTE network has same issue and not only people with HTC one X.
---------- Post added at 03:20 PM ---------- Previous post was at 03:17 PM ----------
a670 said:
I didnt even know that kind of plan existed. Have you switched over yet? Does it work?:fingers-crossed:
Click to expand...
Click to collapse
I was on phone with them last night. They have created a case number for me so their "technical team" can look into it. They promised me to get back to me before friday on this.
For changing the data plan, the CSR tried to change it but it didnt work yesterday. I blame it on the CSR because I know some people on XDA has done that before. I am gonna call them again and have a different CSR try it or me.
And plus, with this change, you get unlimited HSPA+ for just $10.
cr1960 said:
Have you tried this? http://forum.xda-developers.com/showpost.php?p=27732183&postcount=8
Click to expand...
Click to collapse
Thanks for the link. Those settings actually worked for me. I had already tried a couple different APN configs but none of them seemed to stick.
So, now I have successfully disabled LTE.
Unfortunately, I'm still having intermittent missed calls with the phone connected to HSPA. Also, At work in certain areas, we have rock solid LTE reception and guess what...no missed calls. WTFrack?
At home the only time I can get regular calls is when the phone is connected to EDGE.
I seriously think that there must some relationship between 4G/LTE and signal strength. Does anyone know If EDGE and 4G/LTE use the same towers or same power outputs?

Nexus 5 dropping me off Network ??

So I got my nexus 5 on Friday and its perfect none of the mentioned defects was having some small issues with the notification light but that's all. However I noticed once a day since getting it I go to use my phone and it says emergency only / Rogers and I won't be able to make calls or receive calls. Anyone else experiencing this problem ?
Sent from my Nexus 5 using xda app-developers app
I'm on Bell and for some reason sometimes I'd have no signal out of no where then it'll jump back to full bars the next second... Really annoying unless this is a normal thing for the Nexus 5
Sent from my Nexus 5 using xda app-developers app
I'm on Rogers and I get this too. I usually fix it by going into network mode and change it to 3G and back to LTE immediately.
I still get incoming calls even though I can't dial out until I do the above change.
Its network problem not the nexus 5
Sent from my Nexus 5 using Tapatalk
I have the similar problem i'm on rogers and if the signal gets weak it will show signal strength in the home screen, i can surf the internet(data), but will not send text messages or make calls, if I try to make a call it say "cellular network not available", if i turn air plane mode on then off it reconnects right away. this has never happened with my GE Galaxy S4
benetton said:
I have the similar problem i'm on rogers and if the signal gets weak it will show signal strength in the home screen, i can surf the internet(data), but will not send text messages or make calls, if I try to make a call it say "cellular network not available", if i turn air plane mode on then off it reconnects right away. this has never happened with my GE Galaxy S4
Click to expand...
Click to collapse
I have the exact same issue guys, I hope that it has nothing to do with our nexus 5's.
im getting this error too. darn! its not normal for a phone to be like that. never happened to my previous one.
there must be something wrong with the phone.
im on Fido.
but its only happening to canadian network? weird.
maybe they're torturing people who didnt buy from them? lol
It looks like I have a similar issue.
My connection sometimes gets lost. Some sort of hiccup when connected to mobile network.
No issues found on WIFI
I'm on a hspa network in Canada and wanted to report that I get worse reception with the N5 than I did with my Galaxy S2. I hope it is easy fixable with a new modem flash or other update.
Just wanted to contribute in case there is anyone working on this and wanted some more info.
I had to change my data plan because, according to T-Mobile (US) it was not compatible with the phone. I could get emails and SMS text messages but could not get Internet data services (kept being prompted to log onto the network and presented with the T-Mobile logon screen). Lost my unlimited data, which I was grandfathered into (but found out that they were throttling me at 5 GB which I don't usually hit). I knew they would eventually make me change my plan anyway and was able to get a new 4.5 GB plan at the same price. Since T-Mobile will be offering this phone very soon (tomorrow? they're taking pre-orders now), I guess a lot of long-time customers will be pushed off their unlimited data plan.
I have the same problem!! It's really annoying - mine gets dropped every 2-5 mins! Is there a way to fix it? Is it the N5 or Rogers network?
I have the same problem in Belgium:
https://productforums.google.com/forum/m/#!msg/nexus/T5ey4dttBOA/v9OaGzPxESwJ
Sent from my Nexus 5 using xda app-developers app
scutie88 said:
I have the same problem!! It's really annoying - mine gets dropped every 2-5 mins! Is there a way to fix it? Is it the N5 or Rogers network?
Click to expand...
Click to collapse
If you are constantly getting poor signal it might be the handset. If you have good signal, and can use data, but have "Emergency calls only" instead of a carrier name, it's probably a carrier issue.
I am on Fido and have randomly had the same problem. There's another thread somewhere, and most if not all people reporting the problem are Rogers/Fido customers.
trendiggity said:
If you are constantly getting poor signal it might be the handset. If you have good signal, and can use data, but have "Emergency calls only" instead of a carrier name, it's probably a carrier issue.
I am on Fido and have randomly had the same problem. There's another thread somewhere, and most if not all people reporting the problem are Rogers/Fido customers.
Click to expand...
Click to collapse
right here man
http://forum.xda-developers.com/showthread.php?t=2525583
good point though... i don't see anyone from other canadian carriers complaining.
I also have this problem. I am on Fido in BC. Sometimes it will completely cut off the network signal from full bars to no service, similar to no sim card installed. It goes back to normal in about 5-6 seconds by itself but its definitely annoying.
SeraldoBabalu said:
right here man
http://forum.xda-developers.com/showthread.php?t=2525583
good point though... i don't see anyone from other canadian carriers complaining.
Click to expand...
Click to collapse
There were some bell users complaining about it in the other thread as well
Sent from my Nexus 5 using xda app-developers app
yeah its the phone and not the network, I switched my Rogers sim to my old phone and get full bars
I too am experiencing this and i'm in the UK. Just wanted to let you know that this may be more widespread thank we think.
Same issue with Tmobile
definitely the phone and not the carrier. I have a samsung galaxy s2 and n5 and it only happens on n5. Both on tmobile in portland oregon
phishncode said:
definitely the phone and not the carrier. I have a samsung galaxy s2 and n5 and it only happens on n5. Both on tmobile in portland oregon
Click to expand...
Click to collapse
It is a software issue. I switched to a different ROM and kernel.
Cataclysm ROM and bricked Kernel.
So far, the connection is solid with this combo.

T-Mobile connectivity

How in the heck can I get this phone to connect to LTE and stay connected? Sometimes it will connect then when I make a call it won't reconnect no matter what I try. They have sent me two different phones. Same problem. I have changed the Sim card also. Is there an app that will help that won't run the battery down real fast? They say the tower is fine but I think it isn't. When I do connect I get 20 down 9 up or so. Thanks to anyone who may help. And yes I've googled it. Lol
Sent from my Nexus 5 using xda app-developers app
it could just be your local area. im in nyc, and on tmo, and am on lte 100% of the time. when you make phonecalls, it will switch from lte to 3G/H, as its supposed to, because the lte doesnt support voice. and while theres data flowing over your network, it wont switch back to lte until the data stops flowing. and no, no app will help you.
Are you using a custom ROM? If so check your APN sometimes it'll default to metro PCs LTE
Sent from my Nexus 5 using Tapatalk
treIII said:
How in the heck can I get this phone to connect to LTE and stay connected? Sometimes it will connect then when I make a call it won't reconnect no matter what I try. They have sent me two different phones. Same problem. I have changed the Sim card also. Is there an app that will help that won't run the battery down real fast? They say the tower is fine but I think it isn't. When I do connect I get 20 down 9 up or so. Thanks to anyone who may help. And yes I've googled it. Lol
Sent from my Nexus 5 using xda app-developers app
Click to expand...
Click to collapse
during calls, it'll drop off LTE and go to 3G
after the call, it should go back to LTE (if your signal has no problems) ...
not sure if you are complaining about the no-LTE-reconnect-after-call problem or no-LTE-during-call problem
paperWastage said:
during calls, it'll drop off LTE and go to 3G
after the call, it should go back to LTE (if your signal has no problems) ...
not sure if you are complaining about the no-LTE-reconnect-after-call problem or no-LTE-during-call problem
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I'm speaking that when I'm in a LTE area that my phone won't connect at all. It will sometimes if I pull the Sim card and reinsert it. But tmobiles engineers say the tower is operating properly. Between myself and my son we have had 4 nexus 5's. Whenever I'm by the other tower in town with LTE phone works great. fallback to hspa and then reconnecting to lte works flawless when connected to the other tower. But they say there is no tower issue and sent me another phone.
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[Q] Can't receive calls while on LTE

I literally can't get any calls while connected to LTE. They all go to voicemail. I have been trying to figure this out for days. As soon as I turn off LTE I get calls on 3g with no problems. It also appears that when I'm on LTE if I make a call it had to drop to 3g before the call connects. Data works just fine. I have called sprint but they were less than helpful, updated prl and profile, and tried it in multiple different towns. Anyone have an idea of what to try next?
richse said:
I literally can't get any calls while connected to LTE. They all go to voicemail. I have been trying to figure this out for days. As soon as I turn off LTE I get calls on 3g with no problems. It also appears that when I'm on LTE if I make a call it had to drop to 3g before the call connects. Data works just fine. I have called sprint but they were less than helpful, updated prl and profile, and tried it in multiple different towns. Anyone have an idea of what to try next?
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Whoops accidental thanks lol. If u check the other threads u will know that the way the new tri band phone's work, when on LTE all u get is data, on 3g u get voice and data, so while Ur connected to lte the only way to make or receive calls is for your phone to switch to 3g. This process should be automatic unless u manually changed something to force the phone one lte only.
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luigi311 said:
Whoops accidental thanks lol. If u check the other threads u will know that the way the new tri band phone's work, when on LTE all u get is data, on 3g u get voice and data, so while Ur connected to lte the only way to make or receive calls is for your phone to switch to 3g. This process should be automatic unless u manually changed something to force the phone one lte only.
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That is so false because when I'm on LTE at my local mall, I can send and receive texts just fine.... the OP must've messed with some sort of setting is my guess..?
I have not messed with any settings. This has been happening from day 1. It took me about an hour after I got home from the Sprint store to notice that all calls were going directly to voicemail when I'm on 4G. As soon as I turn off 4G I get all my calls with no problem. I have tried updating prl and profile as I said before, but I don't appreciate people assuming I changed some setting when I'm telling you I didn't change anything. When I'm on 4G there is a spark icon that is constantly showing and the signal bar is always showing 1 bar. I don't know if that's part of the problem or not. If anyone has a serious suggestion to help instead of just assuming I caused this please let me know. Thanks.
Joe0113 said:
That is so false because when I'm on LTE at my local mall, I can send and receive texts just fine.... the OP must've messed with some sort of setting is my guess..?
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Actually text over lte is possible but voice over lte doesnt work for us.
There is a giant s4gru article that explains it all
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richse said:
I have not messed with any settings. This has been happening from day 1. It took me about an hour after I got home from the Sprint store to notice that all calls were going directly to voicemail when I'm on 4G. As soon as I turn off 4G I get all my calls with no problem. I have tried updating prl and profile as I said before, but I don't appreciate people assuming I changed some setting when I'm telling you I didn't change anything. When I'm on 4G there is a spark icon that is constantly showing and the signal bar is always showing 1 bar. I don't know if that's part of the problem or not. If anyone has a serious suggestion to help instead of just assuming I caused this please let me know. Thanks.
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If I read correctly on the s4gru website then the reason ur having this issue is because the tower is missing the 3g upgrade that handles this handoff which is called Circuit Switched Fallback*or enhanced Circuit Switched Fallback. Here's a link to the s4gru page with this info if u wish to learn more about it.
http://s4gru.com/index.php?/blog/1/...-due-to-circuit-switched-fallback-technology/
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gtuansdiamm said:
Actually text over lte is possible but voice or lte doesnt work for us.
There is a giant s4gru article that explains it all
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False again. When at the mall I can make/receive calls as well. You CANNOT use data and be on a call at the same time though (like I could on my S4).
Joe0113 said:
False again. When at the mall I can make/receive calls as well. You CANNOT use data and be on a call at the same time though (like I could on my S4).
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So what your saying is that everything that we know about tri band phones is false? The tri band phones only have 1 antenna so it is impossible to use voice when connected to lte period. When u make a call Sprint kicks you off lte in order to use voice and when the call ends Sprint reconnects you to lte.
eCSFB Gap Issue – What you Need to know:
Smart devices require eCSFB to “fall back” to 3G to accept a voice call if the user is connected to the LTE network.
Taken directly from the link I posted
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luigi311 said:
So what your saying is that everything that we know about tri band phones is false? The tri band phones only have 1 antenna so it is impossible to use voice when connected to lte period. When u make a call Sprint kicks you off lte in order to use voice and when the call ends Sprint reconnects you to lte.
eCSFB Gap Issue – What you Need to know:
Smart devices require eCSFB to “fall back” to 3G to accept a voice call if the user is connected to the LTE network.
Taken directly from the link I posted
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Like I said, I'm not on LTE during the call.....
Joe0113 said:
Like I said, I'm not on LTE during the call.....
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You made it hard to understand what u were saying since u said the guy u quote was giving false information and then said the same thing he explained
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luigi311 said:
You made it hard to understand what u were saying since u said the guy u quote was giving false information and then said the same thing he explained
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Because I thought he said that you can't receive calls or make calls if you are on 4G LTE. Which you can, but once you dial out, or accept the call, you have no data.
Simple miscommunication!!
Joe0113 said:
Because I thought he said that you can't receive calls or make calls if you are on 4G LTE. Which you can, but once you dial out, or accept the call, you have no data.
Simple miscommunication!!
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I never said you can't get a call while on 4G. I said I can't receive a call while my phone is on 4G. Something about my phone or area of service causes my phone not to switch to 3g for incoming calls so the phone never rings
richse said:
I never said you can't get a call while on 4G. I said I can't receive a call while my phone is on 4G. Something about my phone or area of service causes my phone not to switch to 3g for incoming calls so the phone never rings
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i've been having the same problem! I live on the outskirts of the spark network so i only get the regular lte at home. and i dont believe the towers have been upgraded here yet because i wont recieve calls or texts unless i call out on my phone which forces lte off for 3g etc. but if i drive 15 min. north where the "spark" network is deployed then i'll recieve my calls and texts appropriately because the towers are upgraded there.
so sadly i keep my phone on wifi and cdma mode while at home then whenever i go out i have to switch it to lte/cdma and restart the phone so i can utilize lte while im in a "spark" area.
its tedious and sometimes i forget to switch back when i get home.. its such a pain. Leave it to sprint to deploy phones before their network is even ready for them.
pyrochance said:
i've been having the same problem! I live on the outskirts of the spark network so i only get the regular lte at home. and i dont believe the towers have been upgraded here yet because i wont recieve calls or texts unless i call out on my phone which forces lte off for 3g etc. but if i drive 15 min. north where the "spark" network is deployed then i'll recieve my calls and texts appropriately because the towers are upgraded there.
so sadly i keep my phone on wifi and cdma mode while at home then whenever i go out i have to switch it to lte/cdma and restart the phone so i can utilize lte while im in a "spark" area.
its tedious and sometimes i forget to switch back when i get home.. its such a pain. Leave it to sprint to deploy phones before their network is even ready for them.
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Well the places without the 3g upgrades is not that big so they probably just decided to jump on to tri band even though development wasn't complete. It's like saying they should of waited not not sold any LTE devices until they finished deploying LTE, which means they would of still had old devices being sold.
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luigi311 said:
Well the places without the 3g upgrades is not that big so they probably just decided to jump on to tri band even though development wasn't complete. It's like saying they should of waited not not sold any LTE devices until they finished deploying LTE, which means they would of still had old devices being sold.
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well i understand that but at least when they first started selling the lte devices; the devices would still received calls and texts. because even though the lte may not have been upgraded/deployed or whatever yet. the cell phones themselves were compatible with the old network as is. but with these spark devices, they are deploying phones that may or may not work (the main point of a phone is being able to send/receive calls or texts etc) depending on where you are because half of the towers aren't upgraded for csfb
"Circuit Switched Fallback is a great solution to the issue of Sprint Triband LTE smartphones. But the problem here is that the Sprint network is being upgraded in Network Vision, and not all Sprint parts of the Sprint network can currently support CSFB. And it affects all Sprint Triband LTE phones, not just the Nexus 5 and LG G2." quote from http://s4gru.com/index.php?/blog%2...-technology/
and the problem here is the phone is supposed to be able to detect that the lte towers in my area dont have csfb and therefore switch back to cdma. But it doesnt, so it stays connected to lte and i never receive any calls or texts. but when i drive north to a spark network area the csfb works appropriately. So this leads me to believe its a network issue and not that my phone is a lemon.
idk maybe im just blowing hot air here but its frustrating that the most important part of my phone does not work properly for whatever reason in my hometown where i spend most of my time.
pyrochance said:
well i understand that but at least when they first started selling the lte devices; the devices would still received calls and texts. because even though the lte may not have been upgraded/deployed or whatever yet. the cell phones themselves were compatible with the old network as is. but with these spark devices, they are deploying phones that may or may not work (the main point of a phone is being able to send/receive calls or texts etc) depending on where you are because half of the towers aren't upgraded for csfb
"Circuit Switched Fallback is a great solution to the issue of Sprint Triband LTE smartphones. But the problem here is that the Sprint network is being upgraded in Network Vision, and not all Sprint parts of the Sprint network can currently support CSFB. And it affects all Sprint Triband LTE phones, not just the Nexus 5 and LG G2." quote from http://s4gru.com/index.php?/blog%2...-technology/
and the problem here is the phone is supposed to be able to detect that the lte towers in my area dont have csfb and therefore switch back to cdma. But it doesnt, so it stays connected to lte and i never receive any calls or texts. but when i drive north to a spark network area the csfb works appropriately. So this leads me to believe its a network issue and not that my phone is a lemon.
idk maybe im just blowing hot air here but its frustrating that the most important part of my phone does not work properly for whatever reason in my hometown where i spend most of my time.
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I know it's the reason I got rid of LG g2 but the only thing to do right now is put the phone in cdma only and keep checking if they upgrade towers yet
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Joe0113 said:
Because I thought he said that you can't receive calls or make calls if you are on 4G LTE. Which you can, but once you dial out, or accept the call, you have no data.
Simple miscommunication!!
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Click to collapse
According to S4GRU what you are saying is wrong. In order for your phone to ring it kicks you off LTE. Circuit Switched Fallback. When you are connected to LTE your phone receives 0 CDMA signals (this includes voice). When sprint is trying to send voice to your phone, if the CDMA cannot be routed to your phone, the LTE network is checked for your phone, if found the LTE network drops you so the CDMA signal can get to your phone.
Give it a try. Make sure you are connected to LTE and data is in use. Have someone call your phone. Watch your LTE indicator change to grayed out, and switch to CDMA before your phone starts ringing.
sporklover said:
According to S4GRU what you are saying is wrong. In order for your phone to ring it kicks you off LTE. Circuit Switched Fallback. When you are connected to LTE your phone receives 0 CDMA signals (this includes voice). When sprint is trying to send voice to your phone, if the CDMA cannot be routed to your phone, the LTE network is checked for your phone, if found the LTE network drops you so the CDMA signal can get to your phone.
Give it a try. Make sure you are connected to LTE and data is in use. Have someone call your phone. Watch your LTE indicator change to grayed out, and switch to CDMA before your phone starts ringing.
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Finally someone researches this, even though I put the link to it you would be surprised how no-one will open it or not even bother to read it since its kinda on the long side.
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sporklover said:
According to S4GRU what you are saying is wrong. In order for your phone to ring it kicks you off LTE. Circuit Switched Fallback. When you are connected to LTE your phone receives 0 CDMA signals (this includes voice). When sprint is trying to send voice to your phone, if the CDMA cannot be routed to your phone, the LTE network is checked for your phone, if found the LTE network drops you so the CDMA signal can get to your phone.
Give it a try. Make sure you are connected to LTE and data is in use. Have someone call your phone. Watch your LTE indicator change to grayed out, and switch to CDMA before your phone starts ringing.
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No ISH, you still receive the call though, that's what I am trying to say..................
This whole thing is extremely depressing, just got this phone today and it's one of the first things I relized..sure I can put it on 3g and sit tight like that but come on the whole point in getting the newest flagship is how it's better than everything else, and sprint can't make it work right (yet). I noticed with my area that as long as the data is not actively loading a page or downloading it will switch to 3g and calls will come in but if it's load strait to voicemail..hope they get it all fixed the way it's supposed to be soon enough.

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