Develop Bugs

T-Mobile HDSPA

I noticed the other day that Paul from modaco posted that even though he lives in an area with NO 3G on any network all of a sudden he has 3G on T-Mobile.
In my home and surrounding areas i can only get GPRS. If i set my phone to force WCDMA it will never connect.
However after seeing Pauls post i tried again and now setting my phone to force WCDMA i can get one and two bars on HDSPA...
How very strange. It's great though because i use it for web browsing on my pc and i can download roms quickly enough.
Should maybe try a speedtest?

ephumuris said:
I noticed the other day that Paul from modaco posted that even though he lives in an area with NO 3G on any network all of a sudden he has 3G on T-Mobile.
In my home and surrounding areas i can only get GPRS. If i set my phone to force WCDMA it will never connect.
However after seeing Pauls post i tried again and now setting my phone to force WCDMA i can get one and two bars on HDSPA...
How very strange. It's great though because i use it for web browsing on my pc and i can download roms quickly enough.
Should maybe try a speedtest?
Click to expand...
Click to collapse
Pauls new coverage might be a side effect of the tmobile/three network consolidation/expansion. If he has tmob coverage now he probably has 3 too.

I've noticed a better signal recently - sometimes getting H at home. Can I ask which area of Hull you're in?

i've tried it and get 'H' at home now (liverpool city centre) with t-mob. although, i just gopt the 3GB pack turned on on Sun. was on the slower 1GB before that

T mobile are to start roaming on to the Orange network and vice versa as part of their merger which may have something to do with it.
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Sent via the XDA Tapatalk App

gumbald said:
I've noticed a better signal recently - sometimes getting H at home. Can I ask which area of Hull you're in?
Click to expand...
Click to collapse
Longhill, East Hull.

aindow said:
T mobile are to start roaming on to the Orange network and vice versa as part of their merger which may have something to do with it.
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Sent via the XDA Tapatalk App
Click to expand...
Click to collapse
Not yet - end of year for that.

ephumuris said:
I noticed the other day that Paul from modaco posted that even though he lives in an area with NO 3G on any network all of a sudden he has 3G on T-Mobile.
In my home and surrounding areas i can only get GPRS. If i set my phone to force WCDMA it will never connect.
However after seeing Pauls post i tried again and now setting my phone to force WCDMA i can get one and two bars on HDSPA...
How very strange. It's great though because i use it for web browsing on my pc and i can download roms quickly enough.
Should maybe try a speedtest?
Click to expand...
Click to collapse
could you post these settings? I would like to try them

Odd data problem

Ok so I have an unlocked LG Nitro HD with custom ROM (CM10) and it has a very weird problem. I've tried two different AT&T MVNO SIM cards (AirVoice and Consumer Cellular) both have the same issue. My data signal keeps changing from H to H+ and occasionally to 3G like every few seconds regardless of where I am using the phone even outside. I don't understand what the problem is. What could be the issue?

screwregi said:
Ok so I have an unlocked LG Nitro HD with custom ROM (CM10) and it has a very weird problem. I've tried two different AT&T MVNO SIM cards (AirVoice and Consumer Cellular) both have the same issue. My data signal keeps changing from H to H+ and occasionally to 3G like every few seconds regardless of where I am using the phone even outside. I don't understand what the problem is. What could be the issue?
Click to expand...
Click to collapse
Are you able to use mobile data or are you just wondering why the icons go back and forth?

lordcheeto03 said:
Are you able to use mobile data or are you just wondering why the icons go back and forth?
Click to expand...
Click to collapse
Data does work but it seems to drain the battery with the networks constantly switching and on occasion I get a "No Connection" screen on certain apps, I guess because if I open an app while its swapping networks the app cant connect. It's strange.

screwregi said:
Data does work but it seems to drain the battery with the networks constantly switching and on occasion I get a "No Connection" screen on certain apps, I guess because if I open an app while its swapping networks the app cant connect. It's strange.
Click to expand...
Click to collapse
Yeah, constantly swapping networks will drain the battery.. what about your APN settings?

lordcheeto03 said:
Yeah, constantly swapping networks will drain the battery.. what about your APN settings?
Click to expand...
Click to collapse
They are set up properly.
I had another odd problem, just a few minutes ago was texting someone and all of a sudden phone froze while vibrating then restarted! Don't know if that's a bug in CM10 or what, maybe the network swapping is as well.

screwregi said:
They are set up properly.
I had another odd problem, just a few minutes ago was texting someone and all of a sudden phone froze while vibrating then restarted! Don't know if that's a bug in CM10 or what, maybe the network swapping is as well.
Click to expand...
Click to collapse
Maybe make a backup of your CM10 and try flashing a different ROM not based on CM10.

screwregi said:
They are set up properly.
I had another odd problem, just a few minutes ago was texting someone and all of a sudden phone froze while vibrating then restarted! Don't know if that's a bug in CM10 or what, maybe the network swapping is as well.
Click to expand...
Click to collapse
I think this is the same issue that I recently fixed in quattrimus. I will try to get the fix included in the cm kernel soon. You might try my Rom to see if the fix works.

lordcheeto03 said:
Maybe make a backup of your CM10 and try flashing a different ROM not based on CM10.
Click to expand...
Click to collapse
I tried installing CM9 and it appears to have fixed the problem, the phone doesn't try to connect to the H+ network anymore, only the H network and seems to stay on it so far. I did see it quickly go over to the 3G network but it doesn't appear to be causing any issues, it went right back to the H network. However, I really wish the CM10 ROM worked right, as CM9 is so old...

screwregi said:
I tried installing CM9 and it appears to have fixed the problem, the phone doesn't try to connect to the H+ network anymore, only the H network and seems to stay on it so far. I did see it quickly go over to the 3G network but it doesn't appear to be causing any issues, it went right back to the H network. However, I really wish the CM10 ROM worked right, as CM9 is so old...
Click to expand...
Click to collapse
CM10 is snappy and oh so buttery smooth, I give you that. On another note, did you try any other CM10 variants? I'd give tdmcode's AOKP a spin. He says he might have fixed that problem you were talking about in his build.

lordcheeto03 said:
CM10 is snappy and oh so buttery smooth, I give you that. On another note, did you try any other CM10 variants? I'd give tdmcode's AOKP a spin. He says he might have fixed that problem you were talking about in his build.
Click to expand...
Click to collapse
I downloaded the CM10 ROM. It seems to behave slightly differently. It stays on H normally, but when I start to do something with data, it will go to H+ until the data loads, then go back to H. So far no disconnects, I'll keep you posted. Right now I have very limited data, I'm switching to T-Mobile as soon as UPS decides to deliver my SIM card (just found out they have a 1900MHz HSPA+ network in my area!) I'll be able to test it better then, but for now I'm trying to stick to wifi, especially since I wasted so much data tonight playing around with this stuff, lol.

screwregi said:
It stays on H normally, but when I start to do something with data, it will go to H+ until the data loads, then go back to H.
Click to expand...
Click to collapse
This is how it's supposed to work.

drumist said:
This is how it's supposed to work.
Click to expand...
Click to collapse
Ditto... H and 3g are subsets of each other. Namely they can handle simultaneous voice and data 4G (h+) and lte can only handle data. So it switches back to H so you can receive and make calls plus it uses less battery. If you are on either 4G techs and receive a phone call while downloading it will automatically switch to H from h+ or lte, this is why. The only way you will never see this is on an AT&T rom where it only has 4G and lte icons.
Sent from my LG-P930 using xda app-developers app

Swetnes said:
Ditto... H and 3g are subsets of each other. Namely they can handle simultaneous voice and data 4G (h+) and lte can only handle data. So it switches back to H so you can receive and make calls plus it uses less battery. If you are on either 4G techs and receive a phone call while downloading it will automatically switch to H from h+ or lte, this is why. The only way you will never see this is on an AT&T rom where it only has 4G and lte icons.
Sent from my LG-P930 using xda app-developers app
Click to expand...
Click to collapse
I have LTE disabled, I'm not using the phone on AT&T.

Swetnes said:
Ditto... H and 3g are subsets of each other. Namely they can handle simultaneous voice and data 4G (h+) and lte can only handle data. So it switches back to H so you can receive and make calls plus it uses less battery. If you are on either 4G techs and receive a phone call while downloading it will automatically switch to H from h+ or lte, this is why. The only way you will never see this is on an AT&T rom where it only has 4G and lte icons.
Sent from my LG-P930 using xda app-developers app
Click to expand...
Click to collapse
H+ isn't a subset of 4G is it? I know that the CM's have separate icons for 3G/H, H+, 4G, and LTE.

lordcheeto03 said:
H+ isn't a subset of 4G is it? I know that the CM's have separate icons for 3G/H, H+, 4G, and LTE.
Click to expand...
Click to collapse
That certainly is debatable but the US's largest carrier considers it to be, it behaves like 4g, H+ may not be as fast but it is 90%+ as fast in most markets small enough to not make a noticeable difference as far as people's perception and the technology behaves like LTE in a lot of respects, CM is international so it just conforms to International norms so that's why you get H+ AND 4G (LTE) designators.
Sent from my LG-P930 using xda app-developers app

4G Problems

I use mobile data almost everyday but I have some problem with 4G LTE. If my network type is set to 2G/3G/4G, I get 4G signal and it work for just a few minutes. After a few minutes, all signal disappear. I don't have any Internet connection, not even cellular signal for calls.
But if network type is set to 2G/3G, it works flawlessly with 3G connection. (although I face some problem with 3G sometimes, but that is another story).
So did anyone else face this problem too? I'm using U Mobile in Malaysia which uses the 2600Mhz band.
Sent from my ASUS_Z00AD using Tapatalk

ImjuzCY said:
I use mobile data almost everyday but I have some problem with 4G LTE. If my network type is set to 2G/3G/4G, I get 4G signal and it work for just a few minutes. After a few minutes, all signal disappear. I don't have any Internet connection, not even cellular signal for calls.
But if network type is set to 2G/3G, it works flawlessly with 3G connection. (although I face some problem with 3G sometimes, but that is another story).
So did anyone else face this problem too? I'm using U Mobile in Malaysia which uses the 2600Mhz band.
Sent from my ASUS_Z00AD using Tapatalk
Click to expand...
Click to collapse
First step is to always check your APN settings. Make sure they are identical with that of your carrier for 4G LTE.

Does this issue occur in one location or various locations? Please test with WiFi disabled.
Also recommend using ASUS ZenUI app called ASUS Support. There are several helpful tips with basic troubleshooting techniques for your device including including 3G/LTE troubleshooting. Please go to Apps/ASUS Support/Assistance/3G-LTE-WIFI-GPS/Weak or disconnected 3G/LTE signal.
Sincerely,
ASUS_USA

cmendonc2 said:
First step is to always check your APN settings. Make sure they are identical with that of your carrier for 4G LTE.
Click to expand...
Click to collapse
Asus_USA said:
Does this issue occur in one location or various locations? Please test with WiFi disabled.
Also recommend using ASUS ZenUI app called ASUS Support. There are several helpful tips with basic troubleshooting techniques for your device including including 3G/LTE troubleshooting. Please go to Apps/ASUS Support/Assistance/3G-LTE-WIFI-GPS/Weak or disconnected 3G/LTE signal.
Sincerely,
ASUS_USA
Click to expand...
Click to collapse
I already set APN settings to what it should be but still no luck. And nothing in the Asus support app is helping.
I noticed that it happens to me when I'm on the go or I have a few 4G cell tower around me. I suspect it's because of switching of cell towers.
Sent from my ASUS_Z00AD using Tapatalk

Got the same problem. moreover, my wife has an iPhone 6+, we have the same carrier but when we go in not so well covered areas (up to the alps for example) she always has signal while my zenfone loses sim1 for data&voice. sim2 is available but gives only voice coverage btw. signal detection is far better on iPhone. I've tried with another carrier, same outcome.
It seems that sim1 only works with very strong signal from the carrier

ImjuzCY said:
I use mobile data almost everyday but I have some problem with 4G LTE. If my network type is set to 2G/3G/4G, I get 4G signal and it work for just a few minutes. After a few minutes, all signal disappear. I don't have any Internet connection, not even cellular signal for calls.
But if network type is set to 2G/3G, it works flawlessly with 3G connection. (although I face some problem with 3G sometimes, but that is another story).
So did anyone else face this problem too? I'm using U Mobile in Malaysia which uses the 2600Mhz band.
Sent from my ASUS_Z00AD using Tapatalk
Click to expand...
Click to collapse
Try disabling the second Sim and then using 4g on the Active Sim( 1st One ).
On my device, the second sim's signal seems to interfere with that of the first one.
I can use 4G on 1st Sim only when i disable the second sim.
3G works flawlessly tho.
I guess this is a problem with active dual sims??

[email protected] said:
Try disabling the second Sim and then using 4g on the Active Sim( 1st One ).
On my device, the second sim's signal seems to interfere with that of the first one.
I can use 4G on 1st Sim only when i disable the second sim.
3G works flawlessly tho.
I guess this is a problem with active dual sims??
Click to expand...
Click to collapse
But I don't have a second sim in my phone
Sent from my ASUS_Z00AD using Tapatalk

Try going to the phones dial pad and enter --: *#*#4636#*#* then select the first option " phone information" and then scroll down till you see the option to choose which type of bands you get or use.
I.e. GSM /LTE auto prl or CDMA/LTE auto, or all of them if global. Just some advise. Also make sure your APNS are correct for your carrier.

[GUIDE] [HOW TO] Fix VS986 dropping down to 3G/H+ from 4G LTE

I've been working on a fix since a long time now. If you are in SD community then you prolly know me. Anyway I was able to fix this on two of my phones and it's working fine. I tested for 12 hours now. I'll also tell you in the end what problems I'm seeing. I'm also working on a fix for that.
I noticed that a service is started when the fallback happens but if I kill that service the network also dies. But if you follow the below method it safely starts a new service which kills the one that's responsible for killing the 4G/LTE
1. Upgrade your phone to 13B firmware
2. Root 13B
3. Now download Shortcut Master lite app from play store.
4. Now add these shortcuts to your favorites in the "Shortcut Master lite app". You can search for "LTE" and click on search button
LTEBandSelection
LTETestMain
LTE System Selection
CDMAPreference
5. Now click on "LTEBandSelection" and enable all the bands
6. Save and reboot
7. You now need to enable your data and turn off your wifi. Make sure your phone is in Global mode (in settings >> Mobile networks >> System select)
8. After your phone is rebooted open "Shortcut Master lite" app.
9. Now tap on LTETestMain
10. Select Click on CDMA preference.
Now choose Band preference and select "any"
P_REV_Preference ---> "MOB_P_REV 3
This is important.. EVDO Revision --> Rev A
11. "LTE Connect w/o IMS PDN" must be checked
12. Now go back to your main menu in shortcut master lit app
13. This step is very important. Changing the timeout is important. Tap on LTE System Selection
Except "Scan duration" add a couple zeros to all the other timers. For eg: T_mpsr timer (Min) is 200
The fallback timer will reset itself after reboot. But don't worry the configuration is already updated with the new value. For some reasons the shortcut master lite app is not picking it up.
14. Now finally click on "CDMA preference" in the main menu and make sure it has the value you set in Step 10
At step 10 or 13 your network should go away and your phone should complain about "no network". That's fine. just ignore the message.
Now finally reboot your phone. That's it. You should now have 4G LTE and it won't fallback to 3G or H+
The only problem is when I'm on a call my 4G LTE is dropped to 3G/H+. But after I hang up it goes back to 4G LTE after 12 seconds. I don't know if it's an expected behavior. But I'm trying to see if there is a fix for that.
I tested this with Tmobile. Make sure your APN settings are correct.

Not working for me on Cricket (AT&T). Still will always go back to H+, 4G LTE only works when I select CDMA.

konradsa said:
Not working for me on Cricket (AT&T). Still will always go back to H+, 4G LTE only works when I select CDMA.
Click to expand...
Click to collapse
I tried it on my two phones (Both tmobile). My friend just tried it on his phone. It worked for him too.

motorhead_biker said:
I tried it on my two phones (Both tmobile). My friend just tried it on his phone. It worked for him too.
Click to expand...
Click to collapse
That's great! I hope we can figure out also what we need to do to get it to work for AT&T, I am sure it's probably just some small tweaks required.

konradsa said:
That's great! I hope we can figure out also what we need to do to get it to work for AT&T, I am sure it's probably just some small tweaks required.
Click to expand...
Click to collapse
I will try it with my roomies att sim tonight. He has a nano sim, I need to find a sim adapter.

Awesome, thank you! worked for me T-mobile.
it initially didn't work but I had to turn data off then on.
It also cycles me to 2g speed for a few seconds sometimes but that may be due to poor signal in building.

pwtzz said:
Awesome, thank you! worked for me T-mobile.
it initially didn't work but I had to turn data off then on.
It also cycles me to 2g speed for a few seconds sometimes but that may be due to poor signal in building.
Click to expand...
Click to collapse
Yeah It's due to the poor signal. I got that too. You can check your signal strength using LTE discover app.
But overall it's working fine for Tmobile. I'm gonna try and fix ATT tonight.

Is 13B the main thing in the solution? I've changed these settings before on 11A and wasn't fixed. I tried these numbers on 11A and still don't work.
Also, unless a phone supports VOLTE, it'll fall back to 3G/H for calls.

eigen said:
Is 13B the main thing in the solution? I've changed these settings before on 11A and wasn't fixed. I tried these numbers on 11A and still don't work.
Also, unless a phone supports VOLTE, it'll fall back to 3G/H for calls.
Click to expand...
Click to collapse
I tried in 11A and it didn't work for me. So I guess it needs 13B.

So I tried various combinations last night for AT&T/Cricket, but I was not able to get it to work. No matter what I tried, when I had 4G LTE, voice wouldn't work and whenever voice worked, I was back to H+.
If others are reporting that T-Mobile works reliably on 4G and nobody can figure out how to make this work for AT&T, I guess it's time to switch to T-Mobile.

konradsa said:
So I tried various combinations last night for AT&T/Cricket, but I was not able to get it to work. No matter what I tried, when I had 4G LTE, voice wouldn't work and whenever voice worked, I was back to H+.
If others are reporting that T-Mobile works reliably on 4G and nobody can figure out how to make this work for AT&T, I guess it's time to switch to T-Mobile.
Click to expand...
Click to collapse
No. Hold on. I have a solution for ATT too. I tried something last night. Actually while I was working on a solution for ATT I found that we don't even have to go through the steps I mentioned in my OP to solve the problem. It boils down to invoking a service and killing a native VZW service.
The ATT solution I have works but in low signal area 4G fades and it doesn't fallback to 3G or H+. I had to recycle data to get 3G or H+.

It's Working!!!!!!!!! Thank you!!!!!!!
You just made my life much better now!
I finally have a phone which is great and also finally have good reception!
I Love U!

motorhead_biker said:
No. Hold on. I have a solution for ATT too. I tried something last night. Actually while I was working on a solution for ATT I found that we don't even have to go through the steps I mentioned in my OP to solve the problem. It boils down to invoking a service and killing a native VZW service.
The ATT solution I have works but in low signal area 4G fades and it doesn't fallback to 3G or H+. I had to recycle data to get 3G or H+.
Click to expand...
Click to collapse
Yes, that same thing happens when you switch to CDMA mode with AT&T. Voice doesn't work then (obviously), but it also doesn't fall back to H+ automatically, when you lose 4G coverage you pretty much lose signal all together.

konradsa said:
Yes, that same thing happens when you switch to CDMA mode with AT&T. Voice doesn't work then (obviously), but it also doesn't fall back to H+ automatically, when you lose 4G coverage you pretty much lose signal all together.
Click to expand...
Click to collapse
Yeah I know. I also know why that is happening. Actually I think it's a bug in the baseband firmware. But we can fix that issue by just overriding the command that was sent by baseband firmware.

ron.r said:
It's Working!!!!!!!!! Thank you!!!!!!!
You just made my life much better now!
I finally have a phone which is great and also finally have good reception!
I Love U!
Click to expand...
Click to collapse
Lol.. rep me in SD :laugh:

konradsa said:
Yes, that same thing happens when you switch to CDMA mode with AT&T. Voice doesn't work then (obviously), but it also doesn't fall back to H+ automatically, when you lose 4G coverage you pretty much lose signal all together.
Click to expand...
Click to collapse
Do you have a working fix for AT&T/Cricket? Is it different than the T-Mobile?

motorhead_biker said:
Lol.. rep me in SD :laugh:
Click to expand...
Click to collapse
Ha! You are repped!
What root did you use? and steps?
easyroot?
did you split the file and merge it back?

I must have really bad luck or something. It doesn't work for me. The Tbsr_cdma timer resets back to 2 at reboot.
Edit: Appears to be working. Nice job!

renoob said:
Ha! You are repped!
What root did you use? and steps?
easyroot?
did you split the file and merge it back?
Click to expand...
Click to collapse
Root? I just flashed the rooted sys image. That's it. instead of copying it in the FAT32 memory card just copy it to your phone's internal and you don't have to deal with split and merge stuff

If it drops out of 4G on a call then you're talking on 1X. So no video chat, no HD voice and no voice + data?

How to exclude 2G connections on the Exynos version?

Hi,
In the network menù of my unlocked no brand S9+ with Exynos SOC I can't choose to have only 4G and 3G like in LG devices, do You know if there is some secret code or something like that?
My goal is to have the phone only connect to 3G and 4G networks, and never connect to 2G network
Thanks a lot.

I didn't have that option on my S7 and I don't have it either on my S9. It has only 2 options with "only": 3G and 2G.
But I don't miss that, as my goal is having my phone connected to the best available network. For this "LTE/3G/2G (auto connect)" setting works great.

raducanmihai said:
I didn't have that option on my S7 and I don't have it either on my S9. It has only 2 options with "only": 3G and 2G.
But I don't miss that, as my goal is having my phone connected to the best available network. For this "LTE/3G/2G (auto connect)" setting works great.
Click to expand...
Click to collapse
The problem is that once the phone switch to 2G, it will not be possible to return to 3G or 4G unless you close the call, this means worse voice quality and no data connection until you're stuck in 2G.

There is an app called 4G Switcher that I use to set it to UMTS/LTE only. Try it.

SydneyBlue120d said:
The problem is that once the phone switch to 2G, it will not be possible to return to 3G or 4G unless you close the call, this means worse voice quality and no data connection until you're stuck in 2G.
Click to expand...
Click to collapse
You are technically correct, but the chance of that happening - starting a voice call while only in 2G coverage, moving to a 3G/4G area while still speaking and needing data connection while speaking - is a very long shot. Not to mention that if you force 4G/3G and there is only 2G coverage, then you can't make a voice call at all. So between a lesser quality one and not being able to do it, I'll choose the former.
But my opinions are based on my experience, my destinations and the 4G/3G coverage in my country (Romania). There are extremely rare circumstances where there is no 4G/3G coverage here.

I'm using Vodafone Italy, one of the best mobile operator here in Italy, and when I make a long call, i mean longer than 15 minutes, sooner or later it always got stuck on 2G.
So it is a very annoying behavior, and I can't understand why on a LG phone I can exclude 2G and with a Galaxy S9+ I can't.

Any update on this? It is very annoying e.g. when you're calling inside a car to always go and stay stuck in 2G until the end of the conversation, without data connection working

I want to know this too! I always have better 4G reception than 2G but sometimes it gets stuck to 2G.

up, any update about this?

Luish77 said:
There is an app called 4G Switcher that I use to set it to UMTS/LTE only. Try it.
Click to expand...
Click to collapse
What configuration do I need to choose using the app to exlude 2G?

SydneyBlue120d said:
What configuration do I need to choose using the app to exlude 2G?
Click to expand...
Click to collapse
Yea this app works great. But after January 1st I do believe it will not matter. Since they are doing away with anything lower than 4g
Sent from my SM-G960U using Tapatalk

blackops11252 said:
Yea this app works great. But after January 1st I do believe it will not matter. Since they are doing away with anything lower than 4g
Sent from my SM-G960U using Tapatalk
Click to expand...
Click to collapse
I can confirm that even now, if I start a call under 4G and I'm driving, soon it will switch to 2G, no matter what I do, and I'm using Vodafone Italy, one of the best network here.