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[Q] Nexus S 4G - DATA DROPS

I have been having this problem with both of my Nexus S 4G ever since I got them 2 months ago.
My data drops out frequently and takes a while to get back up. If I have 4G enabled, then I have to manually reconnect it as it will not do it on it's own. This happens inside AND outside. Driving down the road or just standing in one spot.
I've tried all of the radios (basebands) and about 7 different ROMs and versions.
I've refreshed the data profile, PRL, and even tried the roaming Verizon PRL and Hybrid PRL.
Gone back to stock and tried everything from scratch. Still the same problem.
Dallas/Fort Worth Area
Network: Sprint
Baseband: D720SPRKE1
PRL Version: P:40447
I contacted Sprint and they just told me to update the profile & PRL.....
Any suggestions?

I'm not familiar with the CDMA nexus s, but are you able to change APN's? At one point I'd be able to connect to 3g (I have an I9020A), but every minute or so it would drop, so I fixed up the APN's for my carrier.

iv had a few data issues
forcing PRL and account updates has fixed it a couple of times
i'v bought used phones that iv had
to have sprint force update
im on LC1
[altho i cant tell any significant difference here]
and my prl is 61086
[a business account]
im currently on slim
make sure your mobile network
is set to roam
is not set to home only

Am I the only one with this problem? As I'm typing this I lost data but still had 3 bars. I never drop calls but only data.
Help please. This is driving me nuts.
Sent from my Nexus S 4G using xda premium

andrewddickey said:
Am I the only one with this problem?
Click to expand...
Click to collapse
no
i go thru periods of it acting bizarre
try disabling wifi and reboot
this USUALLY fixes mine till wifi is re-enabled
and i drop the sprint connection a few times
riding around
it then fails to re-acquire the IP address.
look in your status and see if you still have an IP
when your data fails
fwiw

I never use Wi-Fi. Ever.
Happens while using both 3G and 4G.
Sent from my Nexus S 4G using xda premium

4G is worthless here...
i dont even bother with the switch
does it do the same thing if you disable 4G?

I almost always have to use 4G (if possible) since 3G speeds are slower than dial-up.
I've tried rebooting and leaving 4G off, and still the same. Even tried going back to Gingerbread.
Sent from my Nexus S 4G using xda premium

andrewddickey said:
I almost always have to use 4G (if possible) since 3G speeds are slower than dial-up.
I've tried rebooting and leaving 4G off, and still the same. Even tried going back to Gingerbread.
Sent from my Nexus S 4G using xda premium
Click to expand...
Click to collapse
If going back to GB doesnt help, maybe it is hardware related?
---===:::Greetzz, jojoost:::===---
Sent from my iPad using Tapatalk HD

This is happening with BOTH of my NS4G.
Possibility that BOTH have hardware defects?

Do a profile and prl update
Hit the thanks button if i helped

R0M CHEF said:
Do a profile and prl update
Hit the thanks button if i helped
Click to expand...
Click to collapse
In the original post, I stated that was one of the things I've done.

have you checked to see if you have an IP address
when data fails?
mine shows "unavailable" when it's wonky
and wont re-aquire till i reboot.
i'v seen this on 2 phones
off and on including on oem 2.3.7
fwiw

andrewddickey said:
Am I the only one with this problem?
Click to expand...
Click to collapse
I have the same problems. From what I understand, its a problem with the hardware. I can confirm that's probably the case, because I've tried many different ROMs (stock, cm, etc...) and they all have the same radio issues (3g/4g and wifi)...

I have an NS4G in the DFW area and haven't seen the issues you're reporting. I'm currently on 4.0.4 with D720SPRLC1 baseband. Maybe I'm just lucky and have a good signal at work and home. It's very rare that I find an area of DFW where I don't get any data signal at all. Not sure what to suggest.

I get random drops too and i hate it. My 3g speeds are fairly good even above 1 mbps. Highest i ever got on 3g was 1.51 mbps

Mine will lose data if I'm in a coverage free area for an extended period of time, when I'm back in range 3g icon will show up just never reconnect. A reboot fixes it

Certain Areas
There are certain areas where I live that data just disappears. Although this is just a network thing I believe. It's weird though when I am driving it's like a 10 second drop and then all is good. Hope you get a solid fix!:victory:

Backup 4g Partition
REMOVED - was a bad idea.

I've actually replaced BOTH of the phones with brand new NS4Gs and they shipped with ICS.
Still the same problem.
This is driving me nuts. I was driving and trying to download Maps for the new phone from the Play Store and it took 6 tries. Kept saying RETRY.
What I've come to believe is happening is:
When 4G connects, 3G disconnects. When 4G drops (which is does frequently), 3G has to reconnect.
***Is there a way to keep 3G "on" in the background while 4G is connected?*** Maybe a way for the radio to transition back and forth?

[Q] no LTE

I have a verizon gs3 that is rooted, running beanstalk 4.4.251-20140301-d2lte. I can't get LTE to work correctly. I can get LTE to turn on if I change my 'preferred network type' to LTE/GSM/WCDMA, but then I have no verizon signal (voice signal). When I have it on 'global', I can get 3G and verizon signal, but never any LTE.
This has been going on for quite some time. I've switched between all of the 'preferred network types' but its always 4G and no cell signal, or 3G with cell signal. I used to be on CM 11 nightlies, thought that might be the issue. I switched to Beanstalk, but have the same issue. Just yesterday, I updated my firmware from here: http://forum.xda-developers.com/showthread.php?t=1788313
Is there something obvious that I'm missing?

davids90gt said:
I have a verizon gs3 that is rooted, running beanstalk 4.4.251-20140301-d2lte. I can't get LTE to work correctly. I can get LTE to turn on if I change my 'preferred network type' to LTE/GSM/WCDMA, but then I have no verizon signal (voice signal). When I have it on 'global', I can get 3G and verizon signal, but never any LTE.
This has been going on for quite some time. I've switched between all of the 'preferred network types' but its always 4G and no cell signal, or 3G with cell signal. I used to be on CM 11 nightlies, thought that might be the issue. I switched to Beanstalk, but have the same issue. Just yesterday, I updated my firmware from here: http://forum.xda-developers.com/showthread.php?t=1788313
Is there something obvious that I'm missing?
Click to expand...
Click to collapse
I have the EXACT same issue, so you're not alone! Unfortunately, I have no answer for this either.
I was running CM11 (just the stable releases), started noticing lack of LTE a few weeks ago, decided to give SlimKat a try. The ROM is damn near flawless besides this LTE issue. I could actually never get it go into LTE mode through the normal settings, it would always fall back to 3G (and I'm in the middle of a capital city where there's plenty of 4G coverage). However, if I did that *#*#4636#*#* trick to go into testing mode, I could force it into "LTE Only", at which point the phone would be in LTE mode, and enjoy the blazing fast data speeds I pay for .... but can no longer make phone calls.
Anyone else out there experienced this or something similar? Any suggestions would be greatly appreciated.
Thanks!

After doing some research on it, I decided to flash back to stock and unroot. After that, I still could not get 4G, so I took it into the verizon store. I told him the problem, and that I had heard that it needed a new sim card. After doing some simple test, he burned a sim card for me and that did it! I'm thinking that soon after I flashed a CM11 nightly (a month ago at least) I dialed *228 to update my cell coverage. I think that might have fried it. I have limited knowledge on this topic, but I did read somewhere that dialing *228 on some custom roms is not good.
It would be nice if you could take it in to the store without flashing back to stock, but I'm not sure if they would go for that or not.

davids90gt said:
After doing some research on it, I decided to flash back to stock and unroot. After that, I still could not get 4G, so I took it into the verizon store. I told him the problem, and that I had heard that it needed a new sim card. After doing some simple test, he burned a sim card for me and that did it! I'm thinking that soon after I flashed a CM11 nightly (a month ago at least) I dialed *228 to update my cell coverage. I think that might have fried it. I have limited knowledge on this topic, but I did read somewhere that dialing *228 on some custom roms is not good.
It would be nice if you could take it in to the store without flashing back to stock, but I'm not sure if they would go for that or not.
Click to expand...
Click to collapse
Ah!! I dialed *228 too! Ok, that's gotta be it. Thanks!

[Q] Galaxy S3 I535 No Service After KitKat Flash (4.4.4)

Hello everyone. I was hoping that some of you that are more knowledgeable about this stuff could help me out here. I recently flashed from CM 10.2 to KitKat (4.4.4), which everything went smoothly for the most part. However, I've noticed that my phone constantly has no service. I should probably state that I live in an area with very low service to begin with, but prior to the flash I was able to get at least a bar inside my house. Now, I'm unable to get anything.
The first thing I could think of to check was my settings in the phone. The data is enabled, CDMA Roaming mode is set to automatic, CDMA subscription is set to RUIM / SIM, and the Preferred Network Type was Global. I wasn't familiar with the global setting as I was used to seeing the LTE / CDMA / EvDo options there. So, when I clicked on it, it now gives LTE, 3g, 2g, 1x, and Global as options. I tried changing it to 3g, but the changes would not save that way. The only way I could get them to save was to power off the phone, take the sim card out and put it back in, and then reboot and switch them. Once i pick a new setting (which is now set on 3g), it locks it and I can't change it again without removing sim card.
When I look in About Phone > Status section, I'm seeing the network says searching for service. The mobile network type is unknown. The service state is out of service, and the mobile network state is disconnected.
Is there anything I can do to fix this issue? If so, I would truly appreciate any type of guidance you guys or gals could give me. Thanks!

I didn't read your entire post but myself and several others have reported signal issues after 4.4.4 flashes on all different ROM types. I think 4.4.4 is just picky about what firmware and baseband you're running. I flashed a few different RPM packages too but in the end I got lucky flashing the BLK3 modem and it seemed to fix my issues. I had noticeably poor signal strength most of the time and a couple times I would look down at my phone and I'd have no signal at all.
Maybe a dev or expert can shed some light on the root of the issue. I don't know enough about under the hood stuff to make an expert diagnosis.
Edit: The unanimous fix that everyone appears to agree on is to flash the MF1 AIO (all in one) package and then flash the ML1 modem only. Problem is finding a legit source for the MF1 aio package seems to be up in the air.
Like I said though, I didn't even do this. I was just trying all kinds of combinations of modems/aio's/ and rpm's and I got lucky. 2 days now with a solid signal at all times. LTE speeds are blazing too, 45 down and 10 up.

Check ur imei number. Or flash a backup and see if that fixes ur problem.
Sent from my SCH-I535 using XDA Free mobile app

jayjr1105 said:
Like I said though, I didn't even do this. I was just trying all kinds of combinations of modems/aio's/ and rpm's and I got lucky. 2 days now with a solid signal at all times. LTE speeds are blazing too, 45 down and 10 up.
Click to expand...
Click to collapse
Can you share the specific steps you took? What worked for you and where can we download it from?
thanks!

[Q] anybody else having 4g connection issues?

About 3 weeks ago after installing the update of liquidsmooth 4.4.4 i randomly started dropping to 3g service in places that i normally had full 4g available. It has slowly gotten worse to where if im not on wifi, than the phone is pretty much useless. i normally have full coverage everywhere. so i originally thought that maybe something had gotten messed up on the update, so i did a clean install of liquidsmooth 4.4, and blackbird kernal and same thing still occurred. also tried carbon rom and slimrom, and no luck. so for the fun of it, i went ahead and reflashed the phone back to stock from backups and rerooted it, updated the modems and reinstalled liquidsmooth w/ blackbird kernal, and same thing. i have went through all the mobile networks settings and tried everything and nothing seems to help, idk if that update screwed something up or if its an issue that others have been experiencing as well, or if im just screwed and my phone phone is dying.... any help is appreciated thanks

rideforlife7 said:
About 3 weeks ago after installing the update of liquidsmooth 4.4.4 i randomly started dropping to 3g service in places that i normally had full 4g available. It has slowly gotten worse to where if im not on wifi, than the phone is pretty much useless. i normally have full coverage everywhere. so i originally thought that maybe something had gotten messed up on the update, so i did a clean install of liquidsmooth 4.4, and blackbird kernal and same thing still occurred. also tried carbon rom and slimrom, and no luck. so for the fun of it, i went ahead and reflashed the phone back to stock from backups and rerooted it, updated the modems and reinstalled liquidsmooth w/ blackbird kernal, and same thing. i have went through all the mobile networks settings and tried everything and nothing seems to help, idk if that update screwed something up or if its an issue that others have been experiencing as well, or if im just screwed and my phone phone is dying.... any help is appreciated thanks
Click to expand...
Click to collapse
I'm currently running OmniToad, and ran CM 11M8 for a short while. On T-Mobile at least, with the custom ROMs it's normal to see H+ only when data is being transferred; it will drop back to 3G otherwise. When I ran the stock ROM on the Relay, it would always say "4G" regardless of whether it was in UMTS (3G) or HSPA+ mode. Apps like SignalCheck or CellMapper will tell you which mode it is really in.
On the other hand, if data transmission is only going through as 3G, it could be a phone issue or a tower issue. Is LTE available in your area, or are they just getting it set up? I know when T-Mobile was upgrading the Chicago area to provide LTE, there were a few glitches here and there.
It was stupid for T-Mobile to brand HSPA+ as "4G" but that's a different rant.

Bobby Tables said:
I'm currently running OmniToad, and ran CM 11M8 for a short while. On T-Mobile at least, with the custom ROMs it's normal to see H+ only when data is being transferred; it will drop back to 3G otherwise. When I ran the stock ROM on the Relay, it would always say "4G" regardless of whether it was in UMTS (3G) or HSPA+ mode. Apps like SignalCheck or CellMapper will tell you which mode it is really in.
On the other hand, if data transmission is only going through as 3G, it could be a phone issue or a tower issue. Is LTE available in your area, or are they just getting it set up? I know when T-Mobile was upgrading the Chicago area to provide LTE, there were a few glitches here and there.
It was stupid for T-Mobile to brand HSPA+ as "4G" but that's a different rant.
Click to expand...
Click to collapse
yea LTE has been in this area for quite a while now, i had it with my S4 and it worked perfectly, i never had a problem with the service on the relay either up untill a few weeks ago the internet speed and and data coverage was great, not quite as fast as the LTE on my S4 but it was still more than adequate, i used to use the hotspot and stream netflix on my laptop. now i can usually get a text to send but calls usually fail and if i try and use the internet its impossible. it almost seems like its doing the exact opposite of what it should be doing, as soon as i try and use anything (not while connected to wifi) than it drops coverage to 3g/edge/ or to nothing at all. Im leaning towards the hardware failing side, but i figured i might as well give it a shot and post it and see if maybe i wasnt alone. thank you for your reply.
small note of background on me: first time posting ever in this forum but have been using the tools and roms from it for a long time, so im not a complete noob, but i definitely still have a lot to learn.

No LTE in some ROMs

Hello. My issue is that my phone won't connect to LTE in stock ROM, but it connects with CM 12.1. But my main "concern" is that it used to connect to LTE using stock ROM... To make the long story short: when I bought the phone, it only connected to H, even if I selected LTE in Preferred Network Type (selecting LTE there even made, and still makes my data connection unstable, getting disconnected and rapidly connecting to data network, but only uses H network type) so I selected 3G, because it was made my connection stable.
Then, after some time, I decided to try and select LTE again, and it connected to LTE! Good, fast, stable connection. But after some weeks, I had to wipe my data partition, and again... it would't grab LTE. Some days ago, I flashed CM ROM, and I was surprised that it grabbed LTE with it again. And today, I decided to flash stock ROM again because CM gave me some problems with moto apps (I had to wipe data because it entered in a bootloop), and again, no LTE in stock ROM.
My question is, what can be causing this behavior? I didn't do anything to purposely fix data connection and use LTE, and my phone is capable of connecting to my carrier LTE band (i tested the speed when I was on LTE and yes, it was a lot faster than H), so it should be some ROM/software related issue. I tried to reset APN setting, connecting to the 2 APN that my phone has, and still won't get LTE.
Any ideas of what could be causing this behavior? Thanks!

Secuential said:
Hello. My issue is that my phone won't connect to LTE in stock ROM, but it connects with CM 12.1. But my main "concern" is that it used to connect to LTE using stock ROM... To make the long story short: when I bought the phone, it only connected to H, even if I selected LTE in Preferred Network Type (selecting LTE there even made, and still makes my data connection unstable, getting disconnected and rapidly connecting to data network, but only uses H network type) so I selected 3G, because it was made my connection stable.
Then, after some time, I decided to try and select LTE again, and it connected to LTE! Good, fast, stable connection. But after some weeks, I had to wipe my data partition, and again... it would't grab LTE. Some days ago, I flashed CM ROM, and I was surprised that it grabbed LTE with it again. And today, I decided to flash stock ROM again because CM gave me some problems with moto apps (I had to wipe data because it entered in a bootloop), and again, no LTE in stock ROM.
My question is, what can be causing this behavior? I didn't do anything to purposely fix data connection and use LTE, and my phone is capable of connecting to my carrier LTE band (i tested the speed when I was on LTE and yes, it was a lot faster than H), so it should be some ROM/software related issue. I tried to reset APN setting, connecting to the 2 APN that my phone has, and still won't get LTE.
Any ideas of what could be causing this behavior? Thanks!
Click to expand...
Click to collapse
dial *#*#4636#*#* and service menu will appear. in phone info menu select network type 'LTE only' and check your signal strength. if it's low like 1 bar in status bar that's why it keeps switching back to HSPA.

I won't connect if I select LTE only, it just shows "no service". But I have good signal here in my house, as I used to have LTE when this was working fine.

Secuential said:
I won't connect if I select LTE only, it just shows "no service". But I have good signal here in my house, as I used to have LTE when this was working fine.
Click to expand...
Click to collapse
maybe carrier signal problems? you should check LTE signal strength on other's phone and compare with yours when it's available at your house.
and you mentioned it was working with cm12.1, try with it again or maybe ur harware was defected

creative21 said:
maybe carrier signal problems? you should check LTE signal strength on other's phone and compare with yours when it's available at your house.
and you mentioned it was working with cm12.1, try with it again or maybe ur harware was defected
Click to expand...
Click to collapse
Ok, I'll try again with CM again, but it used to work some time with stock too. I think it shouldn't be a carrier or signal related problem, but I'll try using my sim card in other phone, and try again with CM, I'll report back here after I test.

It seems to be caused because of the APN. I inserted another sim card to my phone and it added a new APN, and it changed the Network Type in phone info to "LTE/GSM Auto (PRL)" and now it works! Thanks for the idea!

But I still find it strange that it connected in CM from the start, hahaha

Secuential said:
But I still find it strange that it connected in CM from the start, hahaha
Click to expand...
Click to collapse
because CM has all apns preloaded

creative21 said:
because CM has all apns preloaded
Click to expand...
Click to collapse
Nice! Hahahaha