Develop Bugs

4g and 3g alternating

my 4g and 3g signals keep alternating..... seems like clockwork every 10 or so seconds... and im getting 2 bars of 4g.. :/
anyone else having this issue? i've tried both radio versions.

Moved as not Android Dev.

If you move to an area where your phone loses 4g then it takes a second to switch back to 3g. If your phone keeps finding and then losing the 4g signal it could do this.
It could also be exclusive to the custom ROM you are running?.. If you are..

This is when I stay still... im in philadelphia where they have 4g... right now I'm rooted.. running rooted stock Rom. No 4g data transmission at all but I believe a lot of people are having this problem with the Rom? I believe I was having a problem before I actually rooted though.. anyone else?

Not till I tried to run Fresh rom then I tried damages rom same outcome my 3g and 4g keep altering went back to my rooted stock and its good again. When I tried to flash the 4g fix it would stay in 3g and the 4g would be stuck in turning on mode this was done while on the fresh rom

I had the exact same problem. It has nothing to do with signal strength.
For some reason, the Wimax is set to disconnect after 10 seconds if idle time.
Idle time is defined by the number of seconds no traffic is passing to or from the internet.
When it disconnects, wimax will rescan and reconnect to the 4G network.
I found a fix for this, you will need your MSL code though to fix this so call Sprint and ask for it.
##DATA#
EDIT mode
Put in your MSL code.
Wimax
Change "Wimax_idle_sleep" from 10 to 300 seconds.
Click menu > commit changes.
Your phone will reboot and problem solved.

clubtech said:
I had the exact same problem. It has nothing to do with signal strength.
For some reason, the Wimax is set to disconnect after 10 seconds if idle time.
Idle time is defined by the number of seconds no traffic is passing to or from the internet.
When it disconnects, wimax will rescan and reconnect to the 4G network.
I found a fix for this, you will need your MSL code though to fix this so call Sprint and ask for it.
##DATA#
EDIT mode
Put in your MSL code.
Wimax
Change "Wimax_idle_sleep" from 10 to 300 seconds.
Click menu > commit changes.
Your phone will reboot and problem solved.
Click to expand...
Click to collapse
thanks for the post this fixed the problem for me! also i used this tut to get my msl code: http://forum.xda-developers.com/showthread.php?t=697487
now the battery life is a lot better as well thanks again

This is great. I was trying to make these modifications directly in the [mac addy].tree.xml file and they wouldn't persist. A reboot and the values I modified were reverted to their original state. I didn't realize they had to be modified here.

deonjahy said:
thanks for the post this fixed the problem for me! also i used this tut to get my msl code: http://forum.xda-developers.com/showthread.php?t=697487
now the battery life is a lot better as well thanks again
Click to expand...
Click to collapse
Worked wonderfully.. Thanks

4G in New Jersey
I get 4G in my town, bound brook, NJ. Its almost as fast as wifi.

This problem was pissing me off to no end. This procedure fixed it perfectly! removing tree.xml first did not fix it, although some people have had that help them instead. Nothing is ever consistent but in the end, something usually works.

4G - 3G Toggle for Verizon GN?

Sorry if this has been asked, but searching for the word "4G" fails for some reason.
I use the Extended Controls widget, but the 4G toggle setting isn't supported on the Nexus (or perhaps for Verizon?), so is there a widget out there that will work with the VZW Nexus?
Thanks!

I found a 4g toggle bewteen SwitcherPro Widgets' toggles...

It says in the market that it doesn't work for LTE. What's up with that?
Might have to wait for a VZW specific ROM that has it in the pulldown menu.

arrtoodeetoo said:
It says in the market that it doesn't work for LTE. What's up with that?
Might have to wait for a VZW specific ROM that has it in the pulldown menu.
Click to expand...
Click to collapse
Personally, I'd like something with Tasker/Locale features. Turn off LTE when the screen is off, turn on LTE when it's on...

That's what I have been looking for all day...lte off when screen off. Not that my screen has been of much so far...
Sent from my Galaxy Nexus using Tapatalk

takaides said:
Personally, I'd like something with Tasker/Locale features. Turn off LTE when the screen is off, turn on LTE when it's on...
Click to expand...
Click to collapse
Or 4G when screen is on, 3G when screen is off so you still get notifications. Also, an option to auto switch to 3G after the battery gets below a certain level would be nice.
Of course, even running 3G all day, my battery life stinks. I'm going to let it discharge overnight and see if that helps it condition a little.

Glad someone else thought of this
I agree with the idea of LTE being on/off with the screen...however, I would also like to see a toggle as well for times when I'm using the phone but not the internet.

I feel like switching between 4G and 3G that often would hurt your battery life (Keep having to find signal)

Bobb_o said:
I feel like switching between 4G and 3G that often would hurt your battery life (Keep having to find signal)
Click to expand...
Click to collapse
I agree. I think it would be a very poor solution. One of the most battery intensive tasks is searching for signal. Doing that every time you turn on and off your screen?
I had and an EVO 4G and now an EVO 3D (my buddy just got a GN LTE and is looking for a 4G toggle) and I've found the best way to preserve battery is to stay on 3G 90% of the time. If I'm about to download a bunch of apps or 3G is just going too damn slow, I quickly toggle on 4G and turn it off before I pocket the phone. Treating it as a "turbo mode" basically.

I don't know of a working toggle as of yet. If you wanted, you can manually change the setting under Settings > Mobile Networks > Network mode and changing it to "CDMA" only

Widgetsoid 2.0 has a 4g enable/disable widget but it says experimental and is greyed out. Hopefully something coming soon...

Have you tried juice defender (free version in market)? I don't live in a 4g area so my lte radio is always off, but hypothetically juice defender would auto toggle the 3g/4g radios.
Sent from my Galaxy Nexus using xda premium

I'm still searching for a 3g/4g toggle widget or something. I would also like to leave the 4g off except when I am downloading or browsing. My house is also just out of 4g's reach so It would also be nice to disable 4g when on wifi.
Has anyone found anything that works? It seems like it would be a very simple app to create.

I have the Verizon Galaxy Nexus and I had this same problem. I use "Date Enabler Widget" and it works perfect

Doubler9 said:
I have the Verizon Galaxy Nexus and I had this same problem. I use "Date Enabler Widget" and it works perfect
Click to expand...
Click to collapse
http://market.android.com/details?id=com.farproc.data.enabler
This appears to be a complete data on/off toggle - not a 3G/4G toggle

thrillerbee said:
This appears to be a complete data on/off toggle - not a 3G/4G toggle
Click to expand...
Click to collapse
2nd that. There is a 'toggle' called LTE Switch but it just takes you to the menu item, so it's not a true solution. But it gets us about 80% of the way there. I figure it's only a matter of time until Extended or Widgetsoid get a working toggle.

nycebo said:
2nd that. There is a 'toggle' called LTE Switch but it just takes you to the menu item, so it's not a true solution. But it gets us about 80% of the way there.
Click to expand...
Click to collapse
yep. that's what i've been using. works fine..

I'll give the Data Enabler a shot.
Saves me a bit of trouble at least for the time being

takaides said:
Personally, I'd like something with Tasker/Locale features. Turn off LTE when the screen is off, turn on LTE when it's on...
Click to expand...
Click to collapse
Locale + widgetsolid combo gives you the option to make a locale rule. It seems to work most of the time....
I'm still waiting for a widget toggle,...

I leave my phone on 4g all the time and get ~13 hours. I tried only 3g and my battery life was significantly less. IMO there isn't a built in switch for a reason.

[Q] WIMAX disconnects and never attempts to reconnect

I live in the suburbs of Houston where the WiMAX coverage is kind of spotty. If I leave an area of coverage for more than like say a minute, my 4G will stop attempting to scan for a new 4G signal and never attempt to reconnect even if I enter a new area with 4G coverage. I have to manually toggle the connection in the notification bar.
I've searched the forums and noticed several posts describing the same issue.
Does anyone have a solution?

AzN1337c0d3r said:
I live in the suburbs of Houston where the WiMAX coverage is kind of spotty. If I leave an area of coverage for more than like say a minute, my 4G will stop attempting to scan for a new 4G signal and never attempt to reconnect even if I enter a new area with 4G coverage. I have to manually toggle the connection in the notification bar.
I've searched the forums and noticed several posts describing the same issue.
Does anyone have a solution?
Click to expand...
Click to collapse
I have seen this issue as well, do you use bluetooth? I know its a random question but I have only noticed this issue with mine when I have the bluetooth on.

rayprobg said:
I have seen this issue as well, do you use bluetooth? I know its a random question but I have only noticed this issue with mine when I have the bluetooth on.
Click to expand...
Click to collapse
Bluetooth is not turned for on my device.

Bump. Anyone else having this issue?

I'm using the phone app so I don't know the link, but there's a link in general, I think, that describes increasing 4g performance. There's two simple tweaks to do and some involved ones. I just did the two simple ones. One is to change the retry interval down to 15 seconds and the minimum signal level for 4g lock is -110db. Those two changes made a noticeable improvement on fringe areas and inside for me.

forum.xda-developers.com/showthread.php?t=1265990

oscarthegrouch said:
forum.xda-developers.com/showthread.php?t=1265990
Click to expand...
Click to collapse
I did those tweaks, that is not the issue. I have tried all the WiMax_Scan_Retry from 1 to 300 and the WiMAX will never reconnect.
For example: I do not have 4G at school and I have 4G at home. If I drive to school, the 4G will disconnect.
Then when I drive home back into 4G coverage and go to sleep even after 10 hours, the 4G will not reconnect.

Bump!!! Also have this issue.
Sent from my SPH-D710 using XDA App

AzN1337c0d3r said:
I did those tweaks, that is not the issue. I have tried all the WiMax_Scan_Retry from 1 to 300 and the WiMAX will never reconnect.
For example: I do not have 4G at school and I have 4G at home. If I drive to school, the 4G will disconnect.
Then when I drive home back into 4G coverage and go to sleep even after 10 hours, the 4G will not reconnect.
Click to expand...
Click to collapse
Try doing what most people do, when you know your leaving a 4g area turn it off. Then turn it back on when you get home. No sense in wasting battery. That and it only takes a couple seconds to turn out back on and reconnect.
Sent from my SPH-D710 using Tapatalk

Khilbron said:
Try doing what most people do, when you know your leaving a 4g area turn it off. Then turn it back on when you get home. No sense in wasting battery. That and it only takes a couple seconds to turn out back on and reconnect.
Sent from my SPH-D710 using Tapatalk
Click to expand...
Click to collapse
I have extended battery that will literally last days even with 4G on so that is not an issue for me. Besides, this is not a viable solution if I want 4G in the car and it moves in and out of areas of spotty coverage. 3G where I live is about as fast as 1x.

Mod? Rooted? Modem?
Is your phone software on stock?
What OTA updates/mods are you running?
Kernel/Modem versions?
It would be good to know of the people seeing these problems have similar software/mods/modems.

mightypenguin said:
Is your phone software on stock?
What OTA updates/mods are you running?
Kernel/Modem versions?
It would be good to know of the people seeing these problems have similar software/mods/modems.
Click to expand...
Click to collapse
I agree. Post your setup in detail. It will help to narrow this issue down. For example I had similar prob's on EL13 modem but with 26/29 flash all is good.
So more info plz.

mightypenguin said:
Is your phone software on stock?
What OTA updates/mods are you running?
Kernel/Modem versions?
It would be good to know of the people seeing these problems have similar software/mods/modems.
Click to expand...
Click to collapse
I tried these:
Stock/Stock+Root/Starburst/Caulkin
EK02/EL26/EL29
Rogue1.3/1.4

This may be an example where adjusting the WiMax settings in ##data# with MSL number will help. Try lowering minimum signal picked up from -89 to -110, you can also change how long it stays connected and how fast it reconnects too...and here's where to read about it all...I did it on my OG Epic, Nexus, and this phone but slightly modified settings..it could also be a kernel thing too. Some of the Nexus ICS ones do that and wont reconnect until you go into settings and toggle
http://forum.xda-developers.com/showthread.php?t=925898
Sent from my SPH-D710 using xda premium

AzN1337c0d3r said:
I tried these:
Stock/Stock+Root/Starburst/Caulkin
EK02/EL26/EL29
Rogue1.3/1.4
Click to expand...
Click to collapse
Ok now it's time to go to your local sprint store. Im outa ideas. You have done morethan most B4 choking a rep.LoL.

I have this same problem.. Sometimes sitting in the living room. When im outside i get 4 bars of 4g but inside i get 1. if some reason i get disconected, it seems to switch over to 3g and stay there without scanning again. If i walk outside again, still stays 3g until i toggle off and on 4g again....
UNnamed with EL29 leaked modem flashed with Gunslinger kern.......
Sent from my SPH-D710 using XDA App

Anyone know of an app that will toggle 4g for us when it loses connection?
Or maybe a tasker profile? I tried in tasker, but I can't seem to get it to do more than basic things. There a couple spots in town that always lose 4g when I drive by and never reconnects as well. 3g is slower than when I use roam control on 1x verizon.

quick way to toggle LTE?

Hey all --
Is there an easy to way to toggle LTE? II'd like to have a quick option to choose LTE but not to leave it on all of the time since my battery dies like 3x as fast.
I know there's the menu option that is like four menus in and requires a reboot.
SETTINGS --> MORE SETTINGS --> MOBILE NETWORKS --> NETWORK MODE
I'm hoping there's a better way.
Thanks!

I'm sure someone will eventually add it to our toggles
Sent from my SPH-L710 using xda app-developers app

As tdwp16 mentioned hopefully someone will add the toggle in. As of right now there is no easy way. That appears to be the ONLY way at the moment

Have you tried
SWITCHIT - 4G LTE TOGGLE
https://play.google.com/store/apps/...1bGwsMSwyLDEsImNvbS5icm93bmVudC5zd2l0Y2hpdCJd

jdelano said:
Have you tried
SWITCHIT - 4G LTE TOGGLE
https://play.google.com/store/apps/...1bGwsMSwyLDEsImNvbS5icm93bmVudC5zd2l0Y2hpdCJd
Click to expand...
Click to collapse
I will have to give that a shot. I have it installed on my SGS3 which is still unrooted at the moment. It at least has not Force Closed on me (like some of the reviewers complained about), but I have yet to find 4G. This is probably just do to the northern part of my area where I live missing coverage in quite a few spots.

I've decided to give this a shot. However, LTE is not available in my area so I will have no idea if it even works....

freeza said:
I've decided to give this a shot. However, LTE is not available in my area so I will have no idea if it even works....
Click to expand...
Click to collapse
Something like the old toggle for wimax 4g on the pull down menu would be most excellent... I have high hopes now that you are on the case, freeza

jdelano said:
Have you tried
SWITCHIT - 4G LTE TOGGLE
https://play.google.com/store/apps/...1bGwsMSwyLDEsImNvbS5icm93bmVudC5zd2l0Y2hpdCJd
Click to expand...
Click to collapse
i'll give it a shot and report back. thanks for the suggestion!

I have every reason that it can be accomplished natively through the settings menu.
Because, if you dial ##3282# and you go through the menus (i forgot the exact one), but it allows you to switch between different modes, LTE being one of them, on the fly without the need to reboot. So I guess all I have to do is remove the reboot option from settings and it should switch the same way that it does in the ##3282# menu.

The app noted in this thread worked for me as far as taking me to the settings but it doesnt work like a toggle does. That being said there is no LTE here in Phoenix yet so I'm screwed either way LOL We have some regular spots of 4g but I dont believe this phone works on regular 4g, unless I'm wrong??? Anyone know?

freeza said:
I've decided to give this a shot. However, LTE is not available in my area so I will have no idea if it even works....
Click to expand...
Click to collapse
No!! All your developmental resources are to be put into force roaming!!! I'm kidding... kinda

jdelano said:
Have you tried
SWITCHIT - 4G LTE TOGGLE
https://play.google.com/store/apps/...1bGwsMSwyLDEsImNvbS5icm93bmVudC5zd2l0Y2hpdCJd
Click to expand...
Click to collapse
it works! its definitely faster than having to reboot my phone after changing it through the settings menu. i hope someone comes up with a widget sometime because that'd be incredibly useful!
thanks for your suggestion

rihc55 said:
it works! its definitely faster than having to reboot my phone after changing it through the settings menu. i hope someone comes up with a widget sometime because that'd be incredibly useful!
thanks for your suggestion
Click to expand...
Click to collapse
You're welcome; I'd love to be able to use LTE - I am hoping Sprint will have better coverage in the Atlanta area soon.

jdelano said:
You're welcome; I'd love to be able to use LTE - I am hoping Sprint will have better coverage in the Atlanta area soon.
Click to expand...
Click to collapse
Yea, I am having the same issue in the northern part of Dallas. LTE is not very good here yet either for Sprint, but hopefully if they sell enough phones and get enough complaints they will break out more towers faster.
Actually I have since uninstalled the App and since then I have not been able to locate LTE at all. I tried putting it back on in an area that I had previously attained 4G and still no go. I hope that Switch It did not mess with my antenna or some such. Just wanted to put the warning out there.

LTE Toggle
freeza said:
I have every reason that it can be accomplished natively through the settings menu.
Because, if you dial ##3282# and you go through the menus (i forgot the exact one), but it allows you to switch between different modes, LTE being one of them, on the fly without the need to reboot. So I guess all I have to do is remove the reboot option from settings and it should switch the same way that it does in the ##3282# menu.
Click to expand...
Click to collapse
I don't have the SGSIII yet, since Sprint has not launched yet in my area, but I had a couple of questions.
Sounds like you are pretty knowledgeable, thanks for the info. When looking at the phone, I was surprised to see and didn't know the reason for the reboot when turning on LTE. Do you know the reason for the reboot? Is it anything logical or necessary?
I would hope that this will be something Dev's start building into their roms, unless of course there is a legitimate reason for the reboot.
Thanks!

freeza said:
I have every reason that it can be accomplished natively through the settings menu.
Because, if you dial ##3282# and you go through the menus (i forgot the exact one), but it allows you to switch between different modes, LTE being one of them, on the fly without the need to reboot. So I guess all I have to do is remove the reboot option from settings and it should switch the same way that it does in the ##3282# menu.
Click to expand...
Click to collapse
The problem with that method -- which also requires your MSL code -- is that if you use it to select LTE, it forces the handset to LTE only without 1x or EVDO. They are mutually exclusive.
This can be used to bypass the normal settings that automatically upshift and downshift between LTE and CDMA data as a threshold function of signal strength, to force LTE. But it has the side effect of killing the voice/text connectivity.

Where did my 4G go!

I live in area that does not have 4 g so it stays off, however today at airport I tried and no 4G toggle anywhere! Where did it go, I swore when I got s3 I tested 4G but now it's gone? Thanks for help.
Sent from my SPH-L710 using xda app-developers app

BiggieD said:
I live in area that does not have 4 g so it stays off, however today at airport I tried and no 4G toggle anywhere! Where did it go, I swore when I got s3 I tested 4G but now it's gone? Thanks for help.
Sent from my SPH-L710 using xda app-developers app
Click to expand...
Click to collapse
GS3 doent have a 4g "toggle" as you say...but you can make sure its enabled
settings-->more settings-->Mobile Network-->Network mode.
Preferred network mode should be set to "CDMA/LTE/EVDO"
If you have "CDMA/LTE/EVDO" enabled, anytime your in a Sprint LTE area your phone icon will switch from 3g to 4g.

n8te_1 said:
GS3 doent have a 4g "toggle" as you say...but you can make sure its enabled
settings-->more settings-->Mobile Network-->Network mode.
Preferred network mode should be set to "CDMA/LTE/EVDO"
If you have "CDMA/LTE/EVDO" enabled, anytime your in a Sprint LTE area your phone icon will switch from 3g to 4g.
Click to expand...
Click to collapse
doesn't it chew up more battery?

bigfamei said:
doesn't it chew up more battery?
Click to expand...
Click to collapse
it shouldnt chew up ure bttery at all, as all it does is search the network for 4gLTE and if it doesnt find it, it will automaticly go to sleep and try again like 2 or 3 hours later or periodically as it tells u. .however u do need to have sprint automatic connention left on in order for that work. atleast thats what i got from reading the sprint connection optimizer information it gave me.

Practitioner said:
it shouldnt chew up ure bttery at all, as all it does is search the network for 4gLTE and if it doesnt find it, it will automaticly go to sleep and try again like 2 or 3 hours later or periodically as it tells u. .however u do need to have sprint automatic connention left on in order for that work. atleast thats what i got from reading the sprint connection optimizer information it gave me.
Click to expand...
Click to collapse
The optimizer isn't for the LTE. I hate that garbage so I always leave it off. As long as your preferred network is set as stated above, it will automatically switch between them. Side note though, it may switch back to 3g if you don't have a very strong 4 g signal. It likes to be weird.
Sent from my SPH-L710 using xda app-developers app

Sounds like your thinking of a wimax phone. I I had a Motorola Photon and you had to physically turn 4g on and off on it.... I think most wimax 4g phones are that way.
Sent from my SPH-L710 using xda app-developers app

Do any of the custom ROMS have a toggle for 4g/3g? I live in a 4g area but sometimes the signal isn't strong enough so it goes to 3g. Quite annoying. It would be great to toggle 3g off and force 4g.

So I had s2 before s3, so I assume the s2 was a 4 -g wimax? It had a toggle widget.
Sent from my SPH-L710 using xda app-developers app

BiggieD said:
So I had s2 before s3, so I assume the s2 was a 4 -g wimax? It had a toggle widget.
Sent from my SPH-L710 using xda app-developers app
Click to expand...
Click to collapse
Correct !:good:

sssqueue said:
Do any of the custom ROMS have a toggle for 4g/3g? I live in a 4g area but sometimes the signal isn't strong enough so it goes to 3g. Quite annoying. It would be great to toggle 3g off and force 4g.
Click to expand...
Click to collapse
Have you tried updating to the new radio? I believe they boosted the power to give slightly better LTE connectivity in those kinds of environments.

There is a way to force LTE on the GS3. I did it with mine so that I could map out the LTE zones with sensorly a bit easier while I was driving over the weekend. The way I was able to do this is you need to have Nova Launcher downloaded and installed.
Once you do this, long press on the home screen and go to "Shortcuts".
Next click on "Activities"
Next scroll down to "IOTHiddenMenu"
Then scroll down and click on "IOTHiddenMenu : HDR1X_Selection"
Doing this will allow you to force LTE only mode. Keep in mind you WILL NOT be able to make any phone calls while doing this. For some reason the GS3 requires the phone to be in LTE + CDMA + EVDO Mode to make calls even if you have a very strong LTE signal.
Another app I would recommend downloading is called OpenSignalMaps. Once you have the LTE only mode turned on or even the normal LTE + CDMA mode, you can use this app to refresh your network by clicking the little refresh button at the bottom left of the app in the Overview tab. What this does is pretty much turn your phones mobile networks on and off and then scan for LTE first before scanning for EVDO. I have been able to connect to many more LTE sites by doing this. Even ones that are fairly far away.
Hope this all helps. Let me know if you have any extra questions.

No data connection at all
I have the settings on GSM/HSPA/LTE, but lost data connection completely. Tried to restart and turned on/off flight mode - still no data. Voice in and out is OK. I finally managed to reconnect by repeating the process. Is there a better way to reconnect?
Thanks.

Check out "Network"
https://play.google.com/store/apps/details?id=de.mangelow.network
It takes you to the network screen as well
Sent from my SPH-L710 using xda app-developers app

with the latest l13 radio my phone will not stay on 4g it is heavily biased to 3g and I do not know how to fix it. I am right next to the 4g towers.. ... any thoughts? Thanks

Thanks
Thanks. Unfortunately, the "Network" app would not run. So I followed a similar line, and found "3G Reconnect". It does not fix the connection issue. Any other thoughts?