Database Info

Radio Reboot Cause and What to DO!

OK Guys and Gals, Here is what is going on with the radio issue. No Matter WHAT radio combos you may be using. As some of you may know by my earlier posts I live in a huge 4G network and never get anything, but 4G and (3G only for a min on boot) This is why I didn't have ANY issue's until I got curious and wanted to try something. On our tbolts, if you try to make a call while in 3G the 3G will drop out until the call is over. I went back to froyo, got pissed and went strait back to GB (doesn't matter what Rom as all the dev have clearly stated) when I did go back to GB things were tight as usual. worked like a charm. I used it as I normally would and everything was fine. upon a self induced restart, before my phone had a chance to obtain 4G (still in 3G) I decided to make a test call to see if the 3G would drop. It didn't. Quickly after I ended the call the phone booted in to bootloader. Thank God I had removed the GB RUU because I don't have a card reader to remove the RUU. I forgot to mention I do have the latest Rom Mgr and was able to get into recovery and simply reboot. After that reboot I would get to my home screen, but this time the 3G only would come up and then reboot. Time after time of rebooting I tried other things such as toggle radio to just grab 4G, then the phone rebooted again! upon the next full boot I quickly moved the original froyo radio strait to the sd card. And yet another reboot. This time I got a Rom Mgr error and noticed that Rom mgr was no longer flashed!!! I flashed it real quick because I knew another reboot was on its way. Rom mgr flashed and I told it to boot in to recovery. Thank **** I flashed Rom manager because if not I would be in continuous boots like the unfortunate others. Once in recovery I Realized that I had told my phone to go in to recovery via Rom mgr. and if I did a restore, the phone would have booted back up with my froyo rom but with the GB radio! so I told CWR to just reboot so I could tell the phone to go into recovery via the pwr restart option (thus not restarting after I flashed my froyo recovery) Once recovery of my froyo rom was complete I used ADB to reboot bootloader and SUCCESS! Bottom line you can not make a call while on 3G with any of the current GB radios, you gotta be quick, Make sure ROM mgr is actually flashed!!!! and hopefully can dump the froyo radio on to your SD card before an inevitable reboot happens! and have some ADB knowledge. I'm certain this is whats going on! People make a call while in 3G and its all down hill from there. So dont bother with telling radio settings to stick with one band. Once this happens, there is no turning back. Any questions PM me. I'm glad I tried this out before Vaca tomorrow with a FUBAR Tbolt
Hope this helps developers somehow. Good luck!

I make calls all day on 3g

Only 3g here in new Mexico and no.issues here. Maybe its more to do with making a call while the phone is trying to.connect to the 4g.
Sent from my ADR6400L using XDA App

thetwiztidfreak said:
Only 3g here in new Mexico and no.issues here. Maybe its more to do with making a call while the phone is trying to.connect to the 4g.
Sent from my ADR6400L using XDA App
Click to expand...
Click to collapse
Good point, but sometimes you never know when that may happen. Ie. Your driving in a 3g area while on a call, hang up and it doesn't get the 4g in the new area ur at and what I mentioned is most likely going to happen. *shrugs*
Sent from my ADR6400L using XDA Premium App

Dubin04 said:
I make calls all day on 3g
Click to expand...
Click to collapse
Maybe, but that one time when u make a 3g call n hang up, if your in a 4g area then, this could happen n Tom manager may drop its cwr flash n **** ya up. Just a heads up. Make a 3g call, but if ur going in a 4g area make damn sure u check rom Mgr to see if cwr is still flashed.
Sent from my ADR6400L using XDA Premium App

In Hawaii I also do not have 4G unfortunately and have been using 3G with a GB ROM.
Sent from my ADR6400L using Tapatalk

This guy was just web browsing.
DroidTh3ory said:
Just happened... 10 minutes ago. I am looking for another Dump truck so I pulled up Craigslist, hit the search box and as I was typing it just started to lag like a MFKR... Then, Reboot. It hit the White HTC screen and just kept rebooting. I pulled the battery and booting into hboot, 3 seconds later... Reboot.
My not be relevant but it happened to be in a 3G area this morning on a job.
There's a Verizon store on my way home. Ill be setting another one up tonight.
Click to expand...
Click to collapse

MrHawaii said:
In Hawaii I also do not have 4G unfortunately and have been using 3G with a GB ROM.
Sent from my ADR6400L using Tapatalk
Click to expand...
Click to collapse
There's your answer. Hope 4G DOESN'T POP UP SOON OR IT MAY BE AN AWESOME THING GONE WRONG!
Sent from my ADR6400L using XDA Premium App

thetwiztidfreak said:
Only 3g here in new Mexico and no.issues here. Maybe its more to do with making a call while the phone is trying to.connect to the 4g.
Sent from my ADR6400L using XDA App
Click to expand...
Click to collapse
Plus your only in 3g. The phone will only grab the dominant signal. So ur good till 4g comes in to ur area. Hope there's a better radio to fix this by then!
Sent from my ADR6400L using XDA Premium App

When you say radio combos are you referring to froyo radios also? Cause gb only has one radio.
Sent from my ADR6400L using XDA App

So... if you have 4G disabled on the GB ROMs you shouldn't encounter the endless bootloop..?

mkilla said:
When you say radio combos are you referring to froyo radios also? Cause gb only has one radio.
Sent from my ADR6400L using XDA App
Click to expand...
Click to collapse
The GB radios out there are combos. They Support cdma,evdo and lte.
Sent from my ADR6400L using XDA Premium App

swimminsurfer256 said:
So... if you have 4G disabled on the GB ROMs you shouldn't encounter the endless bootloop..?
Click to expand...
Click to collapse
Possibly, but hope u maintain 3G because if you happen to go to 1x (CDMA) It may be the start of awfulness! Maybe just force evdo? Good luck
Sent from my ADR6400L using XDA Premium App

Well I'm not running a gb ROM right now but I was, and when I was, I am in and out of 4g/3g areas all day long, it didn't happen to my phone.
Sent from my ADR6400L using XDA App

Dope - make sure you post in the http://forum.xda-developers.com/showthread.php?t=1098363 thread, telling us what your EMMC identifies itself as.
So far, nobody who has bricked their device has stepped forward and given us the magic numbers, so we cannot determine whether specific hardware plays a role in bricking.

mkilla said:
Well I'm not running a gb ROM right now but I was, and when I was, I am in and out of 4g/3g areas all day long, it didn't happen to my phone.
Sent from my ADR6400L using XDA App
Click to expand...
Click to collapse
Have to be running a gb rom with a gb radio. Make a call while in a 3g/4g area. only make a call when in evdo n see what happens after u hang up. Jk
Unless you got another tbolt laying around if u aren't as fortunate as I was with this BS

CorporateGoth said:
Dope - make sure you post in the http://forum.xda-developers.com/showthread.php?t=1098363 thread, telling us what your EMMC identifies itself as.
So far, nobody who has bricked their device has stepped forward and given us the magic numbers, so we cannot determine whether specific hardware plays a role in bricking.
Click to expand...
Click to collapse
Leaving for Florida in a few hours n everything is packed up. Ill report once I'm there if not too busy. Thanks for the link!

I ran a GB rom and radio for over a week set to only 3G and I am in a STRONG 4G area. Made many calls and had no issue.
*edit: Correct me if I'm wrong but your data (3G) drops when in a call, when set to 3G only, due to the fact that you can't have simultaneous data and voice. That is what 4G (LTE) is providing. I open and close the browser a couple of times or toggle airplane mode and it comes back.

rsmiff said:
I ran a GB rom and radio for over a week set to only 3G and I am in a STRONG 4G area. Made many calls and had no issue.
*edit: Correct me if I'm wrong but your data (3G) drops when in a call, when set to 3G only, due to the fact that you can't have simultaneous data and voice. That is what 4G (LTE) is providing. I open and close the browser a couple of times or toggle airplane mode and it comes back.
Click to expand...
Click to collapse
Not my understanding...
I've put mine in 3G only and was still able to use voice and data.
Voice uses 1x...
Not until Voice over LTE will that be accurate...LTE is data only at this point.
Turn off data and you can still make a call, send and receive SMS/MMS.

dajogejr said:
Not my understanding...
I've put mine in 3G only and was still able to use voice and data.
Voice uses 1x...
Not until Voice over LTE will that be accurate...LTE is data only at this point.
Turn off data and you can still make a call, send and receive SMS/MMS.
Click to expand...
Click to collapse
I mean simultaneously use voice and data. You can't currently do that. That is what LTE is going to provide.
dopediculous...Have you done this?
http://forum.xda-developers.com/showthread.php?t=1098363

[Q] Wifi and 4g On At The Same Time Normal?

Just picked up my htc sensation 4g last night. My old phone was a galaxy, and when I got in range of wifi, the 4g would turn off. Sometimes on the sensation it stays on, or comes on from time to time while in range of wifi.. Is this normal, if not, is there a way to fix it?

I think this normal due to the wifi issue it could be choosing the best connection the only way u will have true control is by turning the 4g off, etc
Sent from my HTC Sensation Z710e using XDA Premium App

How do you turn 4g off?

Just bring down the notifications and then hit the quick settings tab then push the mobile toggle.. Make sure the wifi is still on
Sent from my HTC Sensation Z710e using XDA Premium App

Know this post is a little dated, just wondering if you are still having the issue.
I have a Sensation and 4G is never on when I'm connected to wifi.... NEVER. So if its still happening I really would really check into that.

RaViCa said:
Know this post is a little dated, just wondering if you are still having the issue.
I have a Sensation and 4G is never on when I'm connected to wifi.... NEVER. So if its still happening I really would really check into that.
Click to expand...
Click to collapse
I stand corrected. I just noticed that my Sensation that both the 4G and wifi icon was displayed at the same time.
It happenned when after I openned the MyAccount app. This app does not work over wifi so phone automatically switched on the 4G radio in order for the app to work. Once you leave the app it remains running in the background which causes both icons to remain displayed.
So if you use this app (or maybe any other app that does not work over wifi) this could be the cause for both icons to be on.
What I don't know is if it is actually using both wifi and 4g at the same time or does it turn the 4G completely off until the app requiring it is exited.

Bump.
I have the same issue. I use wifi exclusively at home, but sometimes seemingly at random I see a cell connection icon in the notification bar as well. Today it's been on for several hours. I have not used My Account in weeks. When I look in Task Manager no apps are running.
I assume there's some app that "needs" to connect via a cell tower, but don't know how to identify it. Can this be blocked, and if so would that just cause some other issue? Seems like a really unnecessary battery drain, but not a huge problem far as I can tell, just odd.

samnada said:
Bump.
I have the same issue. I use wifi exclusively at home, but sometimes seemingly at random I see a cell connection icon in the notification bar as well. Today it's been on for several hours. I have not used My Account in weeks. When I look in Task Manager no apps are running.
I assume there's some app that "needs" to connect via a cell tower, but don't know how to identify it. Can this be blocked, and if so would that just cause some other issue? Seems like a really unnecessary battery drain, but not a huge problem far as I can tell, just odd.
Click to expand...
Click to collapse
Yeah, I just had it happen to me again a few days ago but this time it was while using the Market. I wanted to purchase an app and noticed that now there is an option of adding it to your mobile carriers bill instead of a credit card so I opted to added to to my bill. Well I am assuming so that t-mobile needed a direct connection with my phone for billing so of course the 4G icon all of a sudden pops on.
In short I am saying I am sure it happens when certain apps are running that need cellular data vs WiFi. Don't know if you can block it but if you do those apps will not perform correctly. Also there are many other things running other than just what the stock task manager shows you.

RaViCa said:
Yeah, I just had it happen to me again a few days ago but this time it was while using the Market. I wanted to purchase an app and noticed that now there is an option of adding it to your mobile carriers bill instead of a credit card so I opted to added to to my bill. Well I am assuming so that t-mobile needed a direct connection with my phone for billing so of course the 4G icon all of a sudden pops on.
In short I am saying I am sure it happens when certain apps are running that need cellular data vs WiFi. Don't know if you can block it but if you do those apps will not perform correctly. Also there are many other things running other than just what the stock task manager shows you.
Click to expand...
Click to collapse
I understand some apps apparently need a cell connection for some reason, perhaps it's location tracking, but mine's been connected for 4 hours straight today. Hard to imagine there's that much data being transferred on a 4G connection. Really seems like something is hung. Just tried putting my phone is airplane mode, then back to regular mode. When I turned it back on the 4G icon appeared for a few seconds then went off and is staying off. So looks like a force interrupt unstuck whatever it was.

verizon 4g radio

hi has anyonr else eperiance this same issue. whenever I go to an area that has little signal or turn the wifi off and on my phone resets to 3g. I have to keep going into the apn settings and change it from EHRPD to 4GLTE and then restart my phone. I cant change any of the settings oe delete extra APN's so I posted a screenshot and im hoping someone can help me out. Thanks
Sent from my SCH-I535 using xda app-developers app

plasmasnakeusa said:
hi has anyonr else eperiance this same issue. whenever I go to an area that has little signal or turn the wifi off and on my phone resets to 3g. I have to keep going into the apn settings and change it from EHRPD to 4GLTE and then restart my phone. I cant change any of the settings oe delete extra APN's so I posted a screenshot and im hoping someone can help me out. Thanks
Sent from my SCH-I535 using xda app-developers app
Click to expand...
Click to collapse
not that it helps much, but this is an issue seeming to affect alot of us. I havent been able to correct it yet however. If I find anything out I'll post it.

Just put on airplane mode and turn it back off. Boom your done.
Sent from my SCH-I535 using xda premium

Is that an app you use to change those settings or is that buried somewhere?
Sent from my SCH-I535 using xda app-developers app

I just checked as I haven't seen it yet either. Settings, More settings, mobile network, access point names
Kind of cool. Mine showed the first option chosen but it hope between 3G and 4G as usual. Choosing LTE made no difference for me. I have virtually no 4g signal where I love
Sent from my SCH-I535

xceebeex said:
Is that an app you use to change those settings or is that buried somewhere?
Sent from my SCH-I535 using xda app-developers app
Click to expand...
Click to collapse
Airplane mode is a feature of the phone and turns off all radios. You can hold the power button and choose airplane mode or use the quick toggle in the notification window. Since it sounds like you may be in an area with weak 4G, you can also use an app called Phone Info to set it to CDMA auto (PRL) under Device Information. You can also change it back to LTE/CDMA/EvDO if you want it to switch as normal.

With the Verizon S3, is there the need to do *228 (or *22899) ? I did this every so often on my old HTC Incredible.

frankybeenz said:
With the Verizon S3, is there the need to do *228 (or *22899) ? I did this every so often on my old HTC Incredible.
Click to expand...
Click to collapse
Doesn't work on LTE devices. A reboot essentially does the same thing. Some have recommended pulling the battery with the phone on, removing the sim card for about 30sec and then putting everything back in.

Thanks, I know what airplane mode is, wasn't sure where the APN setting was. I will look in to phone info though.
Sent from my SCH-I535 using xda app-developers app

Are you guys also experiencing the "No Sim Card" and "No Network Connection" issues?
Or is this an entirely different issue?

When this phone goes to 3g, it does seem extra bad on how long it takes to switch back to 4g. i have areas where i live where it goes to 3g when going in between hill (less than a 50 foot stretch) and it will not go back to 4g for over 10 minutes if i dont manually do it. Not to mention my LTE never goes above 10 mbps on the best days

Somewhat related...If you use Anycut to create a shortcut to IOTHiddenMenu, enter the ##DATA# Menu, edit. Under "Advanced", there is an LTE toggle, under "Other" > "HDR/1X" you can set the phone mode, and then under "Other" > "LTE APN Settings" you can somewhat modify the APN settings, reset and discard. If it asks for a password, it's 000000.

I gave these a try. I'm trying to find a way for my phone to favor 4G when there's a 4G signal, no matter how weak.
Yesterday I did a test, 3G with 3 bars vs 4G with 0 to 1 and 4G had consistently faster download speeds and shorter ping times. The upload varied from similar to 3G to slower.
Sent from my SCH-I535

Josolanes said:
I gave these a try. I'm trying to find a way for my phone to favor 4G when there's a 4G signal, no matter how weak.
Yesterday I did a test, 3G with 3 bars vs 4G with 0 to 1 and 4G had consistently faster download speeds and shorter ping times. The upload varied from similar to 3G to slower.
Sent from my SCH-I535
Click to expand...
Click to collapse
probably easier said than done. The phone info app can force LTE but you lose voice and text.

Ya I found that out yesterday when testing speeds. I went to send a text then make a call and no luck
Otherwise 4G service where I live could be excellent at one spot then a mile away no service. If I had excellent 4G consistently I'd consider GoSMS which I believe has the option for data text and also a separate VoIP app
Ah well hopefully something will be figured out eventually. With a strong 4G signal 4G is considerably faster and more consistent than my 20mbps home broadband
Sent from my SCH-I535

send it back
I've had similar issues with my network. I had no 4G in 4G areas, but mainly my wifi would disconnect randomly and 3G also dropped to 1X a lot. I ended up having to send it back and get another one. So far no issues. Also the new ones have an "Updated" sticker on them. I think it was just a software update they applied, but I never got the OTA on my old phone.

lefos123 said:
I've had similar issues with my network. I had no 4G in 4G areas, but mainly my wifi would disconnect randomly and 3G also dropped to 1X a lot. I ended up having to send it back and get another one. So far no issues. Also the new ones have an "Updated" sticker on them. I think it was just a software update they applied, but I never got the OTA on my old phone.
Click to expand...
Click to collapse
Your new phone came with an already updated firmware version I535VRALG1 instead of the original version I535VRALF2.

lefos123 said:
I've had similar issues with my network. I had no 4G in 4G areas, but mainly my wifi would disconnect randomly and 3G also dropped to 1X a lot. I ended up having to send it back and get another one. So far no issues. Also the new ones have an "Updated" sticker on them. I think it was just a software update they applied, but I never got the OTA on my old phone.
Click to expand...
Click to collapse
I'm having the same issue with my second replacement phone... My first one was replaced for an entirely different issue (loose home button).
Did you get the "No Sim Card" notification and "No Network Connection" message?
I think I might have to return this one as well...

PJnc284 said:
probably easier said than done. The phone info app can force LTE but you lose voice and text.
Click to expand...
Click to collapse
Not sure if anyone will have the same luck I have with the "Phone Info" app, but with it I was able to get my 4g service back and my phone is functioning normally again. Just open the app, select Device Information and scroll down to "Set preferred network type" and select "LTE/CDMA/EvDo" then get out of the app.. 4g should return shortly there after. When I looked at it, my device was set to "GSM/CDMA auto (PRL)"

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

Phone doesn't reconnect to LTE after dropping to 3G?

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