Develop Bugs

Tmobile S4 on AT&T cannot connect to LTE help!

Hey everyone!
So I picked up a tmobile s4 to use on ATT since I read it was the most unlocked due to bands / bootlocker. I unlocked it via the method described on this site via the debug menu.
Popped in ATT sim, everything looked fine initially.
1. I'm only getting 4G in an LTE area. device hasn't picked up any LTE anywhere yet.
2. When I go under "Network Mode" and select "LTE/GSM/WCDMA (auto connect) the signal dies out and it always reverts back to GSM/WCDMA"
3. I've called ATT a few times and triple checked that I'm on an Android LTE data plan, so that's not an issue. ATT techs suggested it could be a device issue and maybe I should take it into their tech center.
4. Tried to set up ATT Visual Voicemail, that failed also.
So can it be a Sim issue? Maybe something on tmobiles side? Since device was never active on their network. A lemon S4?
I've run out of options
Any help would be appreciated.
TIA!

qidrox said:
Hey everyone!
So I picked up a tmobile s4 to use on ATT since I read it was the most unlocked due to bands / bootlocker. I unlocked it via the method described on this site via the debug menu.
Popped in ATT sim, everything looked fine initially.
1. I'm only getting 4G in an LTE area. device hasn't picked up any LTE anywhere yet.
2. When I go under "Network Mode" and select "LTE/GSM/WCDMA (auto connect) the signal dies out and it always reverts back to GSM/WCDMA"
3. I've called ATT a few times and triple checked that I'm on an Android LTE data plan, so that's not an issue. ATT techs suggested it could be a device issue and maybe I should take it into their tech center.
4. Tried to set up ATT Visual Voicemail, that failed also.
So can it be a Sim issue? Maybe something on tmobiles side? Since device was never active on their network. A lemon S4?
I've run out of options
Any help would be appreciated.
TIA!
Click to expand...
Click to collapse
are you using stock ROM?

Rattles said:
are you using stock ROM?
Click to expand...
Click to collapse
Yes I am, I guess I should've mentioned that

Apparently my data stopped working now too. No data at all

qidrox said:
Apparently my data stopped working now too. No data at all
Click to expand...
Click to collapse
Ok so after changing some options around in network i have 4G back up and running. Its on WCDMA/GSM now.

Did you check the apn to make sure its correct for att?
Sent from my SGH-M919 using xda premium

qidrox said:
Hey everyone!
So I picked up a tmobile s4 to use on ATT since I read it was the most unlocked due to bands / bootlocker. I unlocked it via the method described on this site via the debug menu.
Popped in ATT sim, everything looked fine initially.
1. I'm only getting 4G in an LTE area. device hasn't picked up any LTE anywhere yet.
2. When I go under "Network Mode" and select "LTE/GSM/WCDMA (auto connect) the signal dies out and it always reverts back to GSM/WCDMA"
3. I've called ATT a few times and triple checked that I'm on an Android LTE data plan, so that's not an issue. ATT techs suggested it could be a device issue and maybe I should take it into their tech center.
4. Tried to set up ATT Visual Voicemail, that failed also.
So can it be a Sim issue? Maybe something on tmobiles side? Since device was never active on their network. A lemon S4?
I've run out of options
Any help would be appreciated.
TIA!
Click to expand...
Click to collapse
Dial *#*#4636*#*# go under phone and scroll down and select the mode you want then reboot.
Sent from my SGH-M919 using Xparent Skyblue Tapatalk 2

Soldier 2.0 said:
Dial *#*#4636*#*# go under phone and scroll down and select the mode you want then reboot.
Sent from my SGH-M919 using Xparent Skyblue Tapatalk 2
Click to expand...
Click to collapse
Tried doing that. It says " USSD Code running" then it stops and states "Unable to process request"... I dont think that was normal?

Yeaaaayuh!
qidrox said:
Tried doing that. It says " USSD Code running" then it stops and states "Unable to process request"... I dont think that was normal?
Click to expand...
Click to collapse
Figured it out!!! Did a google search and noticed my APN values were wayyy off. Changed them. BAM LTE!! :laugh::good:
Thanks to all that helped!

Share those setting to help others !!!!!!!!

nmccready said:
Share those setting to help others !!!!!!!!
Click to expand...
Click to collapse
Go to settings> more networks>mobile networks> access point network> and change your settings to look like these....
In the "APNs" window just hit the + button to creat a new APN
Sent from my SGH-M919 using XDA Premium 4 mobile app

Thank you!
I also found the setting from here:
https://www.youtube.com/watch?v=gMyD8zqk-Hg which led to here: http://forum.xda-developers.com/showthread.php?t=2336085 .
The main end game fix was that ATT had my IMIE # incorrectly set. Once they fixed that my LTE was a go!
:good: :laugh:

SIM Unlock LG G Pad 8.3 VK810 Verizon to AT&T

I have been searching and cant seem to find anything... :/
I am trying to SIM Unlock my LG G Pad 8.3 Model VK810 that is Verizon and should come factory unlock I believe. I need this to be used on AT&T LTE which I have a sim card for and a tablet plan on the shared data plan.
It is on 4.2.2 baseband is m9615a-cefwtazm
I tried adding some ATT APN settings I found, but that did not help me. I think I need to Change it to GSM From CDMA somehow? I am not really sure. I can update and root if needed or whatever I need to do. I also have a samsung z3x box, but dont think it will work on the LG.
Any help would really help me out! Thank you in advance.

jaredlappa said:
I have been searching and cant seem to find anything... :/
I am trying to SIM Unlock my LG G Pad 8.3 Model VK810 that is Verizon and should come factory unlock I believe. I need this to be used on AT&T LTE which I have a sim card for and a tablet plan on the shared data plan.
It is on 4.2.2 baseband is m9615a-cefwtazm
I tried adding some ATT APN settings I found, but that did not help me. I think I need to Change it to GSM From CDMA somehow? I am not really sure. I can update and root if needed or whatever I need to do. I also have a samsung z3x box, but dont think it will work on the LG.
Any help would really help me out! Thank you in advance.
Click to expand...
Click to collapse
As it seems you are comfortable messing with your APN settings that should be all you will need to do. The device is locked to specific wireless frequencies but luckily for you at &t uses the same LTE frequencies. You will need to have root access in order to write your APN settings though, check the forums for information on that. Finally make sure that the sim you have is compatible with your tablet data plan, and your APN settings should be as follows for mobile data only.
APN: BROADBAND
MCC: 310
MNC: 410

uprightbass360 said:
As it seems you are comfortable messing with your APN settings that should be all you will need to do. The device is locked to specific wireless frequencies but luckily for you at &t uses the same LTE frequencies. You will need to have root access in order to write your APN settings though, check the forums for information on that. Finally make sure that the sim you have is compatible with your tablet data plan, and your APN settings should be as follows for mobile data only.
APN: BROADBAND
MCC: 310
MNC: 410
Click to expand...
Click to collapse
Happen to have a link for a Root tutorial and ROM that is good and stable for my Vk810? Will the V500 work with my pad?
I was looking at this one: http://forum.xda-developers.com/showthread.php?t=2660676
Thank you.

jaredlappa said:
Happen to have a link for a Root tutorial and ROM that is good and stable for my Vk810? Will the V500 work with my pad?
I was looking at this one: http://forum.xda-developers.com/showthread.php?t=2660676
Thank you.
Click to expand...
Click to collapse
I do not, I am sure you will find something if you look around. The V500 and V510 methods are not compatible. There is a method for yours though along with a custom recovery in the works. You may even have a custom rom in the near future.
P.S. this topic belongs in Q/A and not development.

uprightbass360 said:
I do not, I am sure you will find something if you look around. The V500 and V510 methods are not compatible. There is a method for yours though along with a custom recovery in the works. You may even have a custom rom in the near future.
P.S. this topic belongs in Q/A and not development.
Click to expand...
Click to collapse
Why would it belong in Q/A? If I am having to root and unlock it or do custom recovery? Isn't that with development?
Sorry if I have posted in the wrong place.
Here is the link I found for Rooting: http://forum.xda-developers.com/showthread.php?t=2703825
From researching it looks like it will work with the VK810.
This was also newly released: http://forum.xda-developers.com/showthread.php?t=2726707
But there are no custom roms that I have found yet.
So, I should Root this and then change the APN settings to what you told me and my ATT SIM would work?
Thank you!

jaredlappa said:
Why would it belong in Q/A? If I am having to root and unlock it or do custom recovery? Isn't that with development?
Sorry if I have posted in the wrong place.
Here is the link I found for Rooting: http://forum.xda-developers.com/showthread.php?t=2703825
From researching it looks like it will work with the VK810.
This was also newly released: http://forum.xda-developers.com/showthread.php?t=2726707
But there are no custom roms that I have found yet.
So, I should Root this and then change the APN settings to what you told me and my ATT SIM would work?
Thank you!
Click to expand...
Click to collapse
I haven't read much about i0root but it looks like it will work. Now the next part is not certain weather or not it will work, but I have seen tablets able to run on other networks that are unlocked. As long as Verizon did not implement any extra protection you should be able to use an at&t sim that is enabled for tablet data.
Once you are rooted go pick up es file explorer and navigate to /system/etc/apns-conf.xml . Make sure that before you change anything that you make a copy and name it something else so you can find it again if you have to go back. Open the file using the text editor. You can get rid of the other apns and just put your new one in there and give it a reboot. It should kick right on after you reboot. Good luck!

uprightbass360 said:
I haven't read much about i0root but it looks like it will work. Now the next part is not certain weather or not it will work, but I have seen tablets able to run on other networks that are unlocked. As long as Verizon did not implement any extra protection you should be able to use an at&t sim that is enabled for tablet data.
Once you are rooted go pick up es file explorer and navigate to /system/etc/apns-conf.xml . Make sure that before you change anything that you make a copy and name it something else so you can find it again if you have to go back. Open the file using the text editor. You can get rid of the other apns and just put your new one in there and give it a reboot. It should kick right on after you reboot. Good luck!
Click to expand...
Click to collapse
I have an LG G PAD 8.3 VK810 Verizon that I am trying to root in order to SIM unlock from Verizon to ATT.
I have installed the Drivers packages here and it finds the drivers in USB Modes: Charge tablet and media sync fine, but when I go to Internet Connection mode and choose ethernet it can not find the following drivers: CDC ECM, CDC SERIAL, AND 3 THAT SAY LGE ANDROID PHONE.
Any ideas on how to get these drivers installed to try the next step? I tried to go ahead and run the iroot program but it can not find the device.
Thank you for the help.

I have installed a T-Mobile SIM card in my LG GPad 8.3 LTE so I could get the free gig of data they offer existing customers. It worked without rooting. All I did was add a new APN with the proper T-Mobile settings and I was able to surf. Did it right there at the T-Mobile store with the rep to verify it would work before I added the data line to my account.
Sent from my HTC6525LVW using XDA Premium 4 mobile app

That's awesome. I love what tmobile is doing to the phone industry. I love their aggressive stance now on grabbing customers.
Sent from my Nexus 5

jlczl said:
I have installed a T-Mobile SIM card in my LG GPad 8.3 LTE so I could get the free gig of data they offer existing customers. It worked without rooting. All I did was add a new APN with the proper T-Mobile settings and I was able to surf. Did it right there at the T-Mobile store with the rep to verify it would work before I added the data line to my account.
Sent from my HTC6525LVW using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Thx for the tip. The tablet is set to LTE mode and since T-Mobile LTE has the same band with Verizon LTE. It definitely works on T-Mobile.
For AT&T, no luck even if rooted. I used Radio Switcher app to go to the Tablet Info in Testing Mode. But it displays error message "This application does not work on this device".

ttn1185 said:
Thx for the tip. The tablet is set to LTE mode and since T-Mobile LTE has the same band with Verizon LTE. It definitely works on T-Mobile.
For AT&T, no luck even if rooted. I used Radio Switcher app to go to the Tablet Info in Testing Mode. But it displays error message "This application does not work on this device".
Click to expand...
Click to collapse
I rooted and popped in an AT&T sim card and it let's me put in the APN fine.
Sent from my HTC One_M8 using XDA Free mobile app

Skizzy034 said:
I rooted and popped in an AT&T sim card and it let's me put in the APN fine.
Sent from my HTC One_M8 using XDA Free mobile app
Click to expand...
Click to collapse
But that is not my problem. The tablet doesn't pick up AT&T signal

ttn1185 said:
But that is not my problem. The tablet doesn't pick up AT&T signal
Click to expand...
Click to collapse
Easy...
Vk810 supports lte bands 4(aws) and 13 (700mhz block c), bands that Verizon uses
T-Mobile uses band 4 for lte mainly, will use band 2 (1900) and 12 (700 MHz block a) in the future as well. Vk810 will work on T-Mobile wherever tmobile has LTE right now (with band 4)
Att uses band 4, 2 (1900), 17(700mhz block b) and 30(2300mhz). Vk810 will only work on att if at uses band 4. If att only used band 2 in your area, your att phone (which supports band 2) will show LTE, but vk810 won't work
I don't know if there is a map showing which bands att uses in your area. There is a spectrum map showing who owns which band in which region, but no guarantee that att has active cell sites
http://specmap.sequence-omega.net

Tmobile sim on verizon g pad
jlczl said:
I have installed a T-Mobile SIM card in my LG GPad 8.3 LTE so I could get the free gig of data they offer existing customers. It worked without rooting. All I did was add a new APN with the proper T-Mobile settings and I was able to surf. Did it right there at the T-Mobile store with the rep to verify it would work before I added the data line to my account.
Sent from my HTC6525LVW using XDA Premium 4 mobile app
Click to expand...
Click to collapse
How were you able to set up up the G Pad with the tmobile sim ? I went to the tmobile store and they were not able to get service running. What settings did you use ? Any help would be appreciated.

jlanderos93 said:
How were you able to set up up the G Pad with the tmobile sim ? I went to the tmobile store and they were not able to get service running. What settings did you use ? Any help would be appreciated.
Click to expand...
Click to collapse
you need to insert sim, reboot device (it'll prompt you to)
then you need to add the t-mobile APNs to the device
the settings below should work
http://forum.xda-developers.com/showthread.php?t=2240233

paperWastage said:
you need to insert sim, reboot device (it'll prompt you to)
then you need to add the t-mobile APNs to the device
the settings below should work
http://forum.xda-developers.com/showthread.php?t=2240233
Click to expand...
Click to collapse
I see people here say this tablet is unlocked. I rooted & inserted an at&t sim, but not working. It shows a greyed out singnal bar and a circle next to it. Then I edited build.prop ro.build.target_operator=VZN to OPEN. Now the circle is gone leaving a greyed out signal bar with small red x above it. I'm on 4.2.2. Can someone elaborate?

mrgj said:
I see people here say this tablet is unlocked. I rooted & inserted an at&t sim, but not working. It shows a greyed out singnal bar and a circle next to it. Then I edited build.prop ro.build.target_operator=VZN to OPEN. Now the circle is gone leaving a greyed out signal bar with small red x above it. I'm on 4.2.2. Can someone elaborate?
Click to expand...
Click to collapse
what region/location are you in?
believe that circle = battery indicator, not network indicator.... full circle = 100% battery, otherwise not 100% battery

mrgj said:
I see people here say this tablet is unlocked. I rooted & inserted an at&t sim, but not working. It shows a greyed out singnal bar and a circle next to it. Then I edited build.prop ro.build.target_operator=VZN to OPEN. Now the circle is gone leaving a greyed out signal bar with small red x above it. I'm on 4.2.2. Can someone elaborate?
Click to expand...
Click to collapse
I'm not sure if this works on at&t. Mine is working on T-Mobile. All I did was insert the T-Mobile SIM and APN settings for it to work.
Sent from my HTC6525LVW using XDA Premium 4 mobile app

jlczl said:
I'm not sure if this works on at&t. Mine is working on T-Mobile. All I did was insert the T-Mobile SIM and APN settings for it to work.
Sent from my HTC6525LVW using XDA Premium 4 mobile app
Click to expand...
Click to collapse
as I said before...
this device is unlocked... it accepts any SIMs, and works w/ any band 4/13 network
AT&T's network accept any device that's approved for GSM/LTE spec, and compatible with their band 2/4/17/30 network.
AT&T doesn't have band 4 everywhere.. for example, no band 4 in nyc region.... this device won't work on at&t in nyc

paperWastage said:
as I said before...
this device is unlocked... it accepts any SIMs, and works w/ any band 4/13 network
AT&T's network accept any device that's approved for GSM/LTE spec, and compatible with their band 2/4/17/30 network.
AT&T doesn't have band 4 everywhere.. for example, no band 4 in nyc region.... this device won't work on at&t in nyc
Click to expand...
Click to collapse
LOL, I know it's unlocked. I'm using it on T-Mobile without a problem. And yes, I read your previous post. I was just answering what I personally know firsthand.
Sent from my HTC6525LVW using XDA Premium 4 mobile app

LTE Connection problems

For those of you have LTE connection issues when in the past LTE worked fine I want to share what I did and it worked. I am not in a Spark area and after getting the update from Sprint I lost LTE connection at work. I previously had LTE a 100% of the time at work. I noticed that a lot of folks on the Sprint forums were having the very same issue. After researching with Sprint to solve my problem (They were no help at all), and the combination of things I read here on xda (I can't find the forum So I take not credit for this) I want to share the solution that worked for me.
1. Call Sprint and obtain your MSL code
2. In the phone dialer enter ##3282#
3. press LTE and enter edit, Enter MSL code
4. Click on LTE, then bands 26 and 41 and disable both of them
5. Phone should reboot and LTE should work as it did before
If someone would be so kind if I can't find the threads on here I would like to link them and give credit were it is due.
I just wanted to share what worked for me.

HeckNoTechnO said:
For those of you have LTE connection issues when in the past LTE worked fine I want to share what I did and it worked. I am not in a Spark area and after getting the update from Sprint I lost LTE connection at work. I previously had LTE a 100% of the time at work. I noticed that a lot of folks on the Sprint forums were having the very same issue. After researching with Sprint to solve my problem (They were no help at all), and the combination of things I read here on xda (I can't find the forum So I take not credit for this) I want to share the solution that worked for me.
1. Call Sprint and obtain your MSL code
2. In the phone dialer enter ##3282#
3. press LTE and enter edit, Enter MSL code
4. Click on LTE, then bands 26 and 41 and disable both of them
5. Phone should reboot and LTE should work as it did before
If someone would be so kind if I can't find the threads on here I would like to link them and give credit were it is due.
I just wanted to share what worked for me.
Click to expand...
Click to collapse
not working on zvc Rom help me to fix these settings. i want to change to WCDMA

Reardon said:
not working on zvc Rom help me to fix these settings. i want to change to WCDMA
Click to expand...
Click to collapse
I am on a stock rooted zvc rom. Try updating prl and profile.
Sent from my LG-LS980 using Tapatalk

HeckNoTechnO said:
I am on a stock rooted zvc rom. Try updating prl and profile.
Sent from my LG-LS980 using Tapatalk
Click to expand...
Click to collapse
there is no option provided by our networks of my prl and profile in my Country Pakistan

Reardon said:
there is no option provided by our networks of my prl and profile in my Country Pakistan
Click to expand...
Click to collapse
Then this mod doesn't really pertain to you. It just turns off those connections for Sprints Spark system.
Sent from my iPad using Tapatalk

KB112 said:
Then this mod doesn't really pertain to you. It just turns off those connections for Sprints Spark system.
Sent from my iPad using Tapatalk
Click to expand...
Click to collapse
then can u please tell me which mode i should install? because i am on pakistan network and here is only 3g. i want to sel that up?

Reardon said:
then can u please tell me which mode i should install? because i am on pakistan network and here is only 3g. i want to sel that up?
Click to expand...
Click to collapse
Sorry partner I am in the USA can't help you.

This worked a charm! Thanks!

HeckNoTechnO said:
For those of you have LTE connection issues when in the past LTE worked fine I want to share what I did and it worked. I am not in a Spark area and after getting the update from Sprint I lost LTE connection at work. I previously had LTE a 100% of the time at work. I noticed that a lot of folks on the Sprint forums were having the very same issue. After researching with Sprint to solve my problem (They were no help at all), and the combination of things I read here on xda (I can't find the forum So I take not credit for this) I want to share the solution that worked for me.
1. Call Sprint and obtain your MSL code
2. In the phone dialer enter ##3282#
3. press LTE and enter edit, Enter MSL code
4. Click on LTE, then bands 26 and 41 and disable both of them
5. Phone should reboot and LTE should work as it did before
If someone would be so kind if I can't find the threads on here I would like to link them and give credit were it is due.
I just wanted to share what worked for me.
Click to expand...
Click to collapse
Just a note if you get a profile or prl update that you did not initiate you will have to turn off bands 26 and 41 again following the steps above.

Disabling bands 26 (800mhz) and 41 (2500mhz) seems counterproductive to the gains that Sprint Spark is supposed to bring. I'm guessing it's probably region specific to those having LTE issues where disabling these bands "fixes" whatever issues you're having (maybe Spark is not fully deployed, etc). I'm not having these LTE issues by the way, and LTE coverage here in NYC has improved to the point that i even get LTE in some underground subway stations.

LordLugard said:
Disabling bands 26 (800mhz) and 41 (2500mhz) seems counterproductive to the gains that Sprint Spark is supposed to bring. I'm guessing it's probably region specific to those having LTE issues where disabling these bands "fixes" whatever issues you're having (maybe Spark is not fully deployed, etc). I'm not having these LTE issues by the way, and LTE coverage here in NYC has improved to the point that i even get LTE in some underground subway stations.
Click to expand...
Click to collapse
That's the exact problem, the roll out is far from nation wide. So if you are in a non spark area, the phone constantly seems to search for it. My battery life significantly decreased on ZVC. Once I shut off those bands, my LTE was much more stable and battery life improved greatly.
Sent from my iPad using Tapatalk

LG G4 H818N, can't get LTE working

Hi, I have a LG G4 H818N LTE model with dual sim running firmware v10c.
According to the mobile carrier, they support 900MHz and 2100MHz, yet I am unable to obtain 4G connection on my phone. I have enabled the option in the sim settings for "4G/3G/2G" on the SIM that I want to use for data and set that sim as the sim to use for data connection but it still only connects at H+.
Perhaps the carrier is using Cat 6 LTE. Is there a way to enable Cat 6 LTE on the H818N?
Is there a way that I can test LTE connectivity on the phone or are there perhaps any settings that I may have missed to force LTE connection?
I previously had an LG G3 D855 which connected to 4G without any issues.
Is there a file where I can manually edit the 4G bands for my phone?
Finally, slightly off topic. Can anyone explain to me what a KDZ file is?
Assistance would be highly appreciated. Thanks.

mine has a working LTE on both sim 1 and sim 2 but not simultaneously. i found out that the apn is alittle bit buggy. check your apn and set the primary.

Thanks, would you mind walking me through the steps that you followed please?

enter 277634#*# in dialer and go to field test > modem settings > lte band selection

sampathkumar2811 said:
enter 277634#*# in dialer and go to field test > modem settings > lte band selection
Click to expand...
Click to collapse
on three UK i could only get H+, but after using your instructions and choosing band 3, i now get lte, many thanks! Wiki has all the bands for countries/operators

reg66 said:
on three UK i could only get H+, but after using your instructions and choosing band 3, i now get lte, many thanks! Wiki has all the bands for countries/operators
Click to expand...
Click to collapse
Your welcome

sampathkumar2811 said:
Your welcome
Click to expand...
Click to collapse
hmm, just went to my dads (no lte there) and came home again (lte here) and it would not turn back to lte, had to use the info you gave again. seems it's not sticking. any suggestions?

Hi all, thank you so much for the answer. I'm actually having the same problem with my LG G4 H818N. I'd be grateful if anyone can advise what kind of setting I should choose for my phone to work on Vodafone UK 4G network. I'm so frustrated to pay 4G plan but only get up to H+

Wannato said:
Hi all, thank you so much for the answer. I'm actually having the same problem with my LG G4 H818N. I'd be grateful if anyone can advise what kind of setting I should choose for my phone to work on Vodafone UK 4G network. I'm so frustrated to pay 4G plan but only get up to H+
Click to expand...
Click to collapse
Can't provide link as using xda app, but Google 'wiki Europe lte bands' and it should come up with what you want. I'm on three UK and there was two different bands to try, turned out to be band 3 for me. Hope this helps

reg66 said:
Can't provide link as using xda app, but Google 'wiki Europe lte bands' and it should come up with what you want. I'm on three UK and there was two different bands to try, turned out to be band 3 for me. Hope this helps
Click to expand...
Click to collapse
Sorry for my late reply! I did Google however, Vodafone is on Band 20. When I choose this option, it said Fail. Is anyone know why?

Wannato said:
Sorry for my late reply! I did Google however, Vodafone is on Band 20. When I choose this option, it said Fail. Is anyone know why?
Click to expand...
Click to collapse
switch 2nd sim to gsm n try again
---------- Post added at 01:10 AM ---------- Previous post was at 01:09 AM ----------
reg66 said:
hmm, just went to my dads (no lte there) and came home again (lte here) and it would not turn back to lte, had to use the info you gave again. seems it's not sticking. any suggestions?
Click to expand...
Click to collapse
im not sure of setting up it permanently.

sampathkumar2811 said:
switch 2nd sim to gsm n try again
Thanks. I just tried in the FieldTest -> Network Mode-> set SIM 2 to GSM 850 and try Band 20 again under the LTE Band Selection, but still Fail.
Are these steps correct?
Click to expand...
Click to collapse

Wannato said:
sampathkumar2811 said:
switch 2nd sim to gsm n try again
Thanks. I just tried in the FieldTest -> Network Mode-> set SIM 2 to GSM 850 and try Band 20 again under the LTE Band Selection, but still Fail.
Are these steps correct?
Click to expand...
Click to collapse
try changing the 2nd sim to gsm from settings other than hidden mode
Click to expand...
Click to collapse

sampathkumar2811 said:
Wannato said:
try changing the 2nd sim to gsm from settings other than hidden mode
Click to expand...
Click to collapse
However, I only have 1 SIM inserted at the moment. In order to change to Band 20, does it need to have 2 SIMs inserted and follow your instruction?
Click to expand...
Click to collapse

I'm having a similar issue with my 818N. I can't get 4G/LTE.
Has anyone worked out why or how to fix it?

The hidden menus don't allow me to select lte bands they all just say fail after I select them.
In the RAT menu I am unable to select LTE only, it also fails.
It's as if LTE is disabled?

I tried installing 818P software into the phone which worked fine however I still couldn't connect to 4G.
I give up

It turns out that my phone was faulty and I've returned it to HK for a full refund. DWI were good to deal with and were fast to refund me my money once they confirmed that it was DOA.

Data connection switch 2G/3G/4G missing

Hello guys.
I need another tip as I am not running AT&T network in Europe I wanted to ask you if you are able to switch manually between network types 2G/3G/4G. The phone connects me to 4G regardless to how bad the reception is, and in that areas I want to be able to swotch from 4G to 3G.
Does any of you have a solution for this item?
Your responses will be appreciated.

catalindobre said:
Hello guys.
I need another tip as I am not running AT&T network in Europe I wanted to ask you if you are able to switch manually between network types 2G/3G/4G. The phone connects me to 4G regardless to how bad the reception is, and in that areas I want to be able to swotch from 4G to 3G.
Does any of you have a solution for this item?
Your responses will be appreciated.
Click to expand...
Click to collapse
As far as I've ever known, the only way to really impact that without root would be to change APN settings. I can't really provide specifics on this device, but there definitely isn't a quick and easy way to toggle between them.

disturbd1 said:
As far as I've ever known, the only way to really impact that without root would be to change APN settings. I can't really provide specifics on this device, but there definitely isn't a quick and easy way to toggle between them.
Click to expand...
Click to collapse
catalindobre said:
Hello guys.
I need another tip as I am not running AT&T network in Europe I wanted to ask you if you are able to switch manually between network types 2G/3G/4G. The phone connects me to 4G regardless to how bad the reception is, and in that areas I want to be able to swotch from 4G to 3G.
Does any of you have a solution for this item?
Your responses will be appreciated.
Click to expand...
Click to collapse
Actually all you haveto do is go to your dialer pad and punch in the dialer pad this sequence tight here exactly as shown....*#*#4636#*#* and go to phone info and scroll down and you will see the network mode selection...I m going to post a screenshot for you

raver445 said:
Actually all you haveto do is go to your dialer pad and punch in the dialer pad this sequence tight here exactly as shown....*#*#4636#*#* and go to phone info and scroll down and you will see the network mode selection...I m going to post a screenshot for you
Click to expand...
Click to collapse
I 've found myself this solution after google it. Thank you! I wonder if there is a solution for a toggle in the notification bar.

catalindobre said:
I 've found myself this solution after google it. Thank you! I wonder if there is a solution for a toggle in the notification bar.
Click to expand...
Click to collapse
There isn't any other solution and there is no root available for this thing it's very lockdown so unless someone comes up with something you will just have to do the method I showed you
Sent from my SAMSUNG-SM-G891A using Tapatalk

raver445 said:
There isn't any other solution and there is no root available for this thing it's very lockdown so unless someone comes up with something you will just have to do the method I showed you
Sent from my SAMSUNG-SM-G891A using Tapatalk
Click to expand...
Click to collapse
At least we still have this solution.

catalindobre said:
At least we still have this solution.
Click to expand...
Click to collapse
Yes because the att version has to be rooted and the bootloader unlocked for any modifications to take place
Sent from my SAMSUNG-SM-G891A using Tapatalk

Should we dream to that moment?

catalindobre said:
Should we dream to that moment?
Click to expand...
Click to collapse
For right now yes because I've checked every possible venue no root is possible at this time
Sent from my iPhone using Tapatalk

Thanks a lot!!!
raver445 said:
Actually all you haveto do is go to your dialer pad and punch in the dialer pad this sequence tight here exactly as shown....*#*#4636#*#* and go to phone info and scroll down and you will see the network mode selection...I m going to post a screenshot for you
Click to expand...
Click to collapse
You saved me from selling my beloved S7 Active! After searching (camo green, unlocked) from about 2 months, I bought it a week ago. I'm using "MINT SIM". So on default network settings, I'm fine outdoor, but indoor situation is horrible, it keeps me in LTE (barely 1 bar). So calls were getting disconnected. I don't care about data in my house, as I'm on WIFI all the time. Now, from your provided code, I selected 'Global Auto' and I'm getting ALL bars of network! It is connecting me to UMTS automatically! Data speed good enough for me! I don't have to sell it anymore! Thanks a lot!!

catalindobre said:
Hello guys.
I need another tip as I am not running AT&T network in Europe I wanted to ask you if you are able to switch manually between network types 2G/3G/4G. The phone connects me to 4G regardless to how bad the reception is, and in that areas I want to be able to swotch from 4G to 3G.
Does any of you have a solution for this item?
Your responses will be appreciated.
Click to expand...
Click to collapse
QuickShortcutMaker > Hidden Network Setting > All GSM

mddj said:
QuickShortcutMaker > Hidden Network Setting > All GSM
Click to expand...
Click to collapse
A very fast response I've sold the phone only 4 years ago ).

)))
I solved this problem for the customer today. Found this forum. Replied. May be useful for the next generation %)

catalindobre said:
A very fast response I've sold the phone only 4 years ago ).
Click to expand...
Click to collapse
)))