Database Users

[Q] No signal on WDCDMA mode. Data and Calling only works on GSM mode.

Hello. I recently purchased a S4 I9505. After installing my sim card i noticed periods of no signall and "emergency calls only" phases. I had to restart phone to get it to work, but only for a short while before i got the no signal issues again.
I had my micro-sim cut from my previous one so thinking a bad cut could be the problem i got a new out of the packet micro-sim from my service provider. Which didn't really solve anything.
The S4 version officially selling in my country is the I9500 one, but i know a number of people using the I9505 version here with no issues.
After messing around with the settings i found i get perfect network on GSM only mode. I can use data by means of GPRS and EDGE but its just really slow. As soon as i turn the network mode to GSM/WCDMA or WCDMA mode only i get the no signal problem.
I factory reset-ted from the phone menu as well as the boot menu and that too didn't solve anything
Has anyone encountered the same problem?, Anyone know how to fix it?.
Really bummed out considering how much i had to go through to buy the phone.
Any help would be much appreciated.
Thanks.

Maybe the i9505 doesn't support the right bands for your area??

Hi
I have same problem here http://forum.xda-developers.com/showthread.php?t=2421947 but no fix found

thatsupnow said:
Maybe the i9505 doesn't support the right bands for your area??
Click to expand...
Click to collapse
Nah, like i said i've tried using other S4 I9505 in the same area and other phones that support 3G. They work perfectly . Im beginning to think its a hardware fault rather than a software one
tnp0511 said:
Hi
I have same problem here http://forum.xda-developers.com/showthread.php?t=2421947 but no fix found
Click to expand...
Click to collapse
Lets hope this thread draws some one who knows how to. Good luck to you.

Bump

S4 I9505 no 3G but only G

hello all
bought the second hand phone with this network issue.
after trying some roms, wifi fixes, network fixes, root settings, finally stopped on pyrana rom but during all those, couldnt find out what could be the reason for the mobile network.
and also realized that the imei number is not same as behind, could that be the reason? any chance to change that? or any tips to get 3G?
using tele2 in Holland, used my sim in another phone, 3G working
also used another sim from Tmobile in this phone, again only G no 3G.
thanks from now
link for the screenshot (coudlnt put the full link bcoz of being new here)
i.imgur.com/TIeKTbF.jpg

difficult question?

Vedaturka said:
difficult question?
Click to expand...
Click to collapse
Goto Settings, tap the Connections tab, goto More Networks, then tap on Mobile Networks. What does your Network Mode say?
Are you on GSM only or are you on either LTE/WCDMA/GSN (Auto connect) or WCDMA/GSM (Auto connect)?
If you're on WCDMA, it could possibly be an access point problem, or maybe a modem issue?

thanks for trying to help man. im on lte/wcdma/gsm auto...
just flashed to omega v28 4.4.2 but again no luck... still only G

Vedaturka said:
thanks for trying to help man. im on lte/wcdma/gsm auto...
just flashed to omega v28 4.4.2 but again no luck... still only G
Click to expand...
Click to collapse
Have you checked your APN? Is it set up correctly?
Where it says More Networks, tap on Access Point Names and check yours is set up correctly.
You should be able to find the APN details online through google

yep.. did that auto, manual, copying from another phone, didnt work. and the imei is still diffrent than the one behind the phone. still thinking that could cause the problem. :/

change device for solving problem

erwinjmalmsteen said:
change device for solving problem
Click to expand...
Click to collapse
i wish i could do that just as easy as you say

Looking on Google, it seems some people have had a bit of luck with this issue after doing a Manual Roam.
That involves going into Settings, More Networks, Mobile Networks then tap Network Operators. Wait for it to scan and then choose another network to try and connect too. It'll fail. Then go back and do it again, but this time select your network operator and it'll connect.
It's worth a try?

Brownie2k said:
Looking on Google, it seems some people have had a bit of luck with this issue after doing a Manual Roam.
That involves going into Settings, More Networks, Mobile Networks then tap Network Operators. Wait for it to scan and then choose another network to try and connect too. It'll fail. Then go back and do it again, but this time select your network operator and it'll connect.
It's worth a try?
Click to expand...
Click to collapse
i tried, found 3 providers network, connected and then returned to mine, didnt work. im still thinking that the imei has something to do with it.
thanks for trying again man. appreciate it

Vedaturka said:
i tried, found 3 providers network, connected and then returned to mine, didnt work. im still thinking that the imei has something to do with it.
thanks for trying again man. appreciate it
Click to expand...
Click to collapse
Did you say that the IMEI number shown in Android is different than the one printed behind the battery?
If so, that says to me that the phone was once reported stolen at one point, blacklisted and someone has changed the IMEI number to get it off the blacklist and back on the network.

Brownie2k said:
Did you say that the IMEI number shown in Android is different than the one printed behind the battery?
If so, that says to me that the phone was once reported stolen at one point, blacklisted and someone has changed the IMEI number to get it off the blacklist and back on the network.
Click to expand...
Click to collapse
wow never thought that.. so how am i turning it back to the original imei? any idea? i searched for that too, but no luck.. im stucked with this.. paying for 3g but getting only g and its taking ages even to connect to google.com...

Vedaturka said:
wow never thought that.. so how am i turning it back to the original imei? any idea? i searched for that too, but no luck.. im stucked with this.. paying for 3g but getting only g and its taking ages even to connect to google.com...
Click to expand...
Click to collapse
Well, the IMEI number behind the battery will be the phones proper IMEI number.
I think the only way you'll find out if it's been reported stolen is to contact your network and give them the IMEI on the phone (behind the battery) and ask them. Or you could pay for an online check. I'm sure theres a few companies that offer online checks. Keep in mind if the original IMEI is blacklisted, you won't be able to get it removed. Only the person who reported it stolen, and can provide proof it was theirs when it was reported can get it removed.
I'm not too sure how you'd go about changing it back to it's original IMEI, but if the original IMEI has been blacklisted, then as soon as you do change it back, you won't be able to use your phone at all. All data/voice services will stop working.

Brownie2k said:
Well, the IMEI number behind the battery will be the phones proper IMEI number.
I think the only way you'll find out if it's been reported stolen is to contact your network and give them the IMEI on the phone (behind the battery) and ask them. Or you could pay for an online check. I'm sure theres a few companies that offer online checks. Keep in mind if the original IMEI is blacklisted, you won't be able to get it removed. Only the person who reported it stolen, and can provide proof it was theirs when it was reported can get it removed.
I'm not too sure how you'd go about changing it back to it's original IMEI, but if the original IMEI has been blacklisted, then as soon as you do change it back, you won't be able to use your phone at all. All data/voice services will stop working.
Click to expand...
Click to collapse
i checked the imei writing in the phone, and here is the result
imei.info/phonedatabase/2500-sony-ericsson-k530/ (copy paste pls. i cant send the link because im new here)
i actualy have a sony ericson which i didnt know
maybe the provider is seeing my phone as sony ericson, and that phone doesnt support 3G... hmmm now i have to find a way to change the imei.
if its reported, then i come back to this

That's your problem right there. Your phone has likely been reported stolen in the past and someone has changed the IMEI to allow it back on the network.
It's possible that the phone who's IMEI has been taken doesn't support 3G so network isn't providing it to your phone.
Sent from my GT-I9505 using XDA Premium 4 mobile app

[Q] SM-G906K audio problems while calling: how solving?

Goodmorning to all,
I am Loris from Italy writing: I am new here and I am not sure I am doing right so, if I am wrong writing something, please tell.
After this I can tell you my problem: I bought a SM-G906K, Samsung Galaxy S6 Prime from Korea as you know, and I soon had problems while calling: if I am calling or receiving a call, sometimes soon, sometimes after some seconds, sometimes after some minutes, or sometimes it does not happen, I can not see anymore person speking on the other phone, but note: they can hear me.
I already try to call even with Skype, and it seams there is no problem: audio is ok even while reproducing video and so on. I tried making calls in emergency mode too, just to understand if some app could be bad, but I have the same problem, always and ony with calls.
What could I do? Please help me, if it is possible.
I am using a 4G Vodafone MICRO SIM card.
Best regards
Loris

loris.filtrading said:
Goodmorning to all,
I am Loris from Italy writing: I am new here and I am not sure I am doing right so, if I am wrong writing something, please tell.
After this I can tell you my problem: I bought a SM-G906K, Samsung Galaxy S6 Prime from Korea as you know, and I soon had problems while calling: if I am calling or receiving a call, sometimes soon, sometimes after some seconds, sometimes after some minutes, or sometimes it does not happen, I can not see anymore person speking on the other phone, but note: they can hear me.
I already try to call even with Skype, and it seams there is no problem: audio is ok even while reproducing video and so on. I tried making calls in emergency mode too, just to understand if some app could be bad, but I have the same problem, always and ony with calls.
What could I do? Please help me, if it is possible.
I am using a 4G Vodafone MICRO SIM card.
Best regards
Loris
Click to expand...
Click to collapse
Put your sim card into another phone and test to see if the problem persists?
That maybe the problem of the network, not your phone.

vndnguyen said:
Put your sim card into another phone and test to see if the problem persists?
That maybe the problem of the network, not your phone.
Click to expand...
Click to collapse
Goodmorning and many thanks for your answer: I already did that, I already changed 3 sim card too, but the problem is going on: with my old SIII all the sims are working as well. Maybe could something work wrong between network and the phone connectivity? From Korea they told me there would not be any problems at all ... but I am seeing it is not like that.
Anyway sometimes I can do calls of 5/10 minutes without problems...so it is strange it is a network issue, is not it?

loris.filtrading said:
Goodmorning and many thanks for your answer: I already did that, I already changed 3 sim card too, but the problem is going on: with my old SIII all the sims are working as well. Maybe could something work wrong between network and the phone connectivity? From Korea they told me there would not be any problems at all ... but I am seeing it is not like that.
Anyway sometimes I can do calls of 5/10 minutes without problems...so it is strange it is a network issue, is not it?
Click to expand...
Click to collapse
I said that may be a network problem. As you have tested with another phone without problem, I doubt that is the problem with your phone.
Try to factory reset to see if it helps? If not, it maybe a hardware fault.

vndnguyen said:
I said that may be a network problem. As you have tested with another phone without problem, I doubt that is the problem with your phone.
Try to factory reset to see if it helps? If not, it maybe a hardware fault.
Click to expand...
Click to collapse
I meant maybe problem between this Korean device and Italian network: could not it be? Have anyone had any experience about this?
I already tried to factory reset by Kies many times but it does not help, and I noted that updates remained on firmware, they were not brought at factory state. If it is a hardware fault I think I'd have this problem with Skype calls too or other programs, is not it? Luckly, or not, this is the only situation I can not hear from the other line ... I really do not know what to do ...

Could it be it is the mark Olleh giving problems? Maybe using a G906 not K (I think this is properly for Prime Special Edition) but S it could work good: don't you think so? K and S are the same, is not it?

loris.filtrading said:
Could it be it is the mark Olleh giving problems? Maybe using a G906 not K (I think this is properly for Prime Special Edition) but S it could work good: don't you think so? K and S are the same, is not it?
Click to expand...
Click to collapse
Call your WIFI provider and ask them to change the channel. Mine was set on AUTO and calls were delayed up to 4 hrs. When they changed the channel (to 11) my phone worked as it should. May not be your problem but something to try.

nrthwds said:
Call your WIFI provider and ask them to change the channel. Mine was set on AUTO and calls were delayed up to 4 hrs. When they changed the channel (to 11) my phone worked as it should. May not be your problem but something to try.
Click to expand...
Click to collapse
But if I am not wifi connected I had the problem too ... I am trying this but I do not know if it is the right solution. At the moment many thanks for your idea ...
Excuse me but what do you mean by "calls were delayed up to 4 hrs"?!

Could it be the solution changing the CSC? Maybe deleting KTC and using another key it could work ... any idea?

loris.filtrading said:
Could it be the solution changing the CSC? Maybe deleting KTC and using another key it could work ... any idea?
Click to expand...
Click to collapse
As the problem happens randomly, I can not tell exactly what may cause the issue.
Changing the CSC or flashing another firmware is a good idea to eliminate all software-related issues.
If you want to change the CSC, install Phone INFO ★Samsung★ app > Menu > Other Tools > CSC Changer.
(Note: That feature requires root to work).

vndnguyen said:
As the problem happens randomly, I can not tell exactly what may cause the issue.
Changing the CSC or flashing another firmware is a good idea to eliminate all software-related issues.
If you want to change the CSC, install Phone INFO ★Samsung★ app > Menu > Other Tools > CSC Changer.
(Note: That feature requires root to work).
Click to expand...
Click to collapse
Goodmorning, ok many thanks ... now I have to understand the way to do those two passages just to try, but first of all one question: doing this what about warranty? The smartphone is only 2 weeks old so, if I am losing warranty, as first I am trying changing it I think ... let me know ...

loris.filtrading said:
Goodmorning, ok many thanks ... now I have to understand the way to do those two passages just to try, but first of all one question: doing this what about warranty? The smartphone is only 2 weeks old so, if I am losing warranty, as first I am trying changing it I think ... let me know ...
Click to expand...
Click to collapse
Flashing the stock firmware and changing the CSC will not trip the Knox.
However, changing the CSC may need root to work. If it requires root, make sure to use a root method that does not trip the Knox.

vndnguyen said:
Flashing the stock firmware and changing the CSC will not trip the Knox.
However, changing the CSC may need root to work. If it requires root, make sure to use a root method that does not trip the Knox.
Click to expand...
Click to collapse
Ok I will look for that, hoping to find the solution by this way ... but is not the 4.4.4 or L version arriving so that I could wait for that official? ...

loris.filtrading said:
But if I am not wifi connected I had the problem too ... I am trying this but I do not know if it is the right solution. At the moment many thanks for your idea ...
Excuse me but what do you mean by "calls were delayed up to 4 hrs"?!
Click to expand...
Click to collapse
Calls went to VM, the phone never rang. I wouldn't receive the VM for up to 4 hours later. Messages were delayed, I did not receive the message for 30 minutes from the time the person sent it to me until it finally showed I had a message.
I know it sounds crazy that the WIFI could cause a problem but it did.
Turning off WIFI on my phone did not solve the problem.
When I powered off the router/modem in my home my phone starting working correctly.
Something to try, hope it helps.

nrthwds said:
Calls went to VM, the phone never rang. I wouldn't receive the VM for up to 4 hours later. Messages were delayed, I did not receive the message for 30 minutes from the time the person sent it to me until it finally showed I had a message.
I know it sounds crazy that the WIFI could cause a problem but it did.
Turning off WIFI on my phone did not solve the problem.
When I powered off the router/modem in my home my phone starting working correctly.
Something to try, hope it helps.
Click to expand...
Click to collapse
Goodmorning, surely I am tryin, but I had this problem in places there was not wi-fi ... so I do not think it is changing problems at all ... otherwise I should change something on phone wi-fi maybe ...

Galaxy S5 G906K
Hi,I have exactly the same problem and I can not use the mobile because of this.I leave in Cyprus and I can not hear the person who I try to speak with,sometimes in the middle of conversation,sometimes from the begining or I can speak 5 minutes without any problem.Seems like we have to make some setting for Europe inside in the phone with ☆#0011# and the phone to be rooted first?

This is a problem,if we rooting the phones we losing the warranty but it looks like is no other possibility to escape of our issue.How else?

Galaxy S5 G906K network incompatibilitty
Well,we found out what the problem is with hearing issue while calling.Is comming from the incompatibilitty of the phone hardware network and each country networks providers.Let me explain:Galaxy G906K Lte has only 3G and Lte(4G)networks build inside.So,if you are living in a country who doesn't have 4G install yet or not all over and instead have 2G and 3G only,and this 3G it does not cover all the areas,then when are you not in the 3G antenna area you"ll gonna lose the reception because this type it does not have 2G old GSM network build inside.That means we can not use it in 2G base network countrys.I hope I helped anyone who have this type of galaxy mobile phones.

Unfortunately I have understood you explanation, but before buying it I clearly asked to the seller and they made me sure the device would have worked as well: who told you such this explanation? What site did you buy the S5 from?
Many thank
Loris

Get this
Who told me this?Nobody, is very simple:go on Settings>More networks>Mobile networks>Network setting>RAT mode setting and you will see there Ltd network and 3G network,NO GSM network(2G).So,all the mobiles from Korea are for Korea and other country's which have 3G or Lte(4G)networks.For example Korea have ONLY Lte network. That's why is for Korea and this phone was named Galaxy S5 Lte-A. You must ask refund!

Band change Canada

Hi, i just got the Nexus 6p on friday.
My carrier is Videotron in Canada. When the sales rep activated my phone, a mistake was made in my account and phone logged on to the network but I couldnt make or receive calls and text messages. After hours with tech support the problem hadnt been resolved so i started playing around with the phone and accessed the *#*#4636#*#* menu. I went to band select and 3 options were there. USA BAND, BAND 6 AND BAND 7. I selected USA BAND which still didnt fix the problem. Today the carrier fixed my issue but now I am always on roaming although phone functions properly. I suspect that it is because i played around with the band selection. Any way to restore it to the way it was originally? I tried factory reset, i tried loading the the factory image and still encounter the same issue.

Anyone?

So no experts here would know how to restore my original band?
I tried rel-flashing original factory image, boot, vendor and radio. Still no luck.

Did you try to reflash the Modem.bin?

Your thread is WAY too specific to gather any atention within the forum. Try broadening you question

Well no matter what I do after going to phone util menu (*#*#4636#*#*) and changing my band to USA Band i continue to be roaming. If I go to cellular network menu, I see my carrier there but when selected it tells it cant connect to it. I have a feeling that when i selected the band i screwed something up. The band i should be using here in Canada is BAND 4 but its not a selection i can make as the only ones shown are USA BAND, BAND 6 AND BAND 7. Is there anything i can flash to it to make it go back to full factory? I did flash the latest factory files, would think the modem.bin would also be flashed through that.

Try this man *#*#72786#*#*

chichu_9 said:
Try this man *#*#72786#*#*
Click to expand...
Click to collapse
That does nothing.

so i just finished downloading the factory image and there no modem.bin file in there. Where would I find that file?

I did the same mistake and now am left with an expensive music player! have tried everything,no dice. Looks like the one solution is to fix it with QPST but there are no guides out there for the 6P yet. Hope this comes to attention of some dev who can help.

got my phone through videotron. they replaced the phone and all is well. but i'd still to know if theres a solution to this.

sneakymise said:
got my phone through videotron. they replaced the phone and all is well. but i'd still to know if theres a solution to this.
Click to expand...
Click to collapse
Check out these posts :http://forum.xda-developers.com/showpost.php?p=59131838&postcount=11 , http://forum.xda-developers.com/showpost.php?p=59131510&postcount=9 ,We just need a dev to help us with a guide for the 6P.
@Azlun @lyriquidperfection @BlackSoulxxx

@bigxie I read this post of yours http://forum.xda-developers.com/showpost.php?p=37647704&postcount=16. I could be wrong but it looks like this could fix the issue we have here in this thread. The only options I see on the 6P when selecting bands are 'USA band','Japan band', 'Band 6'. I live in India. After clicking on USA band I've lost all radio stuff and no amount of flashing the factory images or factory resets have fixed it. Can't figure where the band change data got stored on the phone. Could you please help ?

SurenSeven said:
@bigxie I read this post of yours http://forum.xda-developers.com/showpost.php?p=37647704&postcount=16. I could be wrong but it looks like this could fix the issue we have here in this thread. The only options I see on the 6P when selecting bands are 'USA band','Japan band', 'Band 6'. I live in India. After clicking on USA band I've lost all radio stuff and no amount of flashing the factory images or factory resets have fixed it. Can't figure where the band change data got stored on the phone. Could you please help ?
Click to expand...
Click to collapse
Hi, sorry, I just saw that mention.
I've submitted this patch to CM a while ago, so it should be included in CM builds for Nexus 6P. If you're bootloader unlocked, you might try flashing CM to access the full band list.
But, it's also possible that this is a device specific issue (changing the band once sets it permanently?) Since on other devices, I remember that a simple restart just reverts the band selection to default.

bigxie said:
Hi, sorry, I just saw that mention.
I've submitted this patch to CM a while ago, so it should be included in CM builds for Nexus 6P. If you're bootloader unlocked, you might try flashing CM to access the full band list.
But, it's also possible that this is a device specific issue (changing the band once sets it permanently?) Since on other devices, I remember that a simple restart just reverts the band selection to default.
Click to expand...
Click to collapse
The latest CM does not contian extra band. Do not say anything when you did not try with yourself

shuaishuai said:
The latest CM does not contian extra band. Do not say anything when you did not try with yourself
Click to expand...
Click to collapse
Actually, I don't even have a Nexus 6P, I just responded because @SurenSeven dug up my old fix for the band selection feature completely crashing on the Nexus 4 when trying to select additional bands.
This fix has been incorporated in CM since version 10.1. Unfortunately, as CM13 is the only version available for Nexus 6P, and it's still being actively developed, it seems the patch hasn't been merged yet.
Furthermore, even when it does get merged, I have no idea if it'll fix your issue or not.
So basically, good luck guys

bigxie said:
Actually, I don't even have a Nexus 6P, I just responded because @SurenSeven dug up my old fix for the band selection feature completely crashing on the Nexus 4 when trying to select additional bands.
This fix has been incorporated in CM since version 10.1. Unfortunately, as CM13 is the only version available for Nexus 6P, and it's still being actively developed, it seems the patch hasn't been merged yet.
Furthermore, even when it does get merged, I have no idea if it'll fix your issue or not.
So basically, good luck guys
Click to expand...
Click to collapse
Thanks @bigxie . Hopefully someone will provide a fix for this for the 6P.

SurenSeven said:
Thanks @bigxie . Hopefully someone will provide a fix for this for the 6P.
Click to expand...
Click to collapse
Any news on this? I was dumb enough to do the same mistake...

I am having a similar issue in that the phone works when I am in the US, but when I go international it does not work at all.

Flash Chroma ROM dial *#*#4636#*#* select the "Automatic" band that should fix you. You can then flash any ROM or go back to stock after that.

LG G6 Mobile data issue

Hello All.
This may sound like an easy problem to solve and a part of me hopes it is. but im fairly well versed in android and has me baffled.
Phone runs beautifully 870DS. When i leave WiFi, the swith to mobile data takes for ever and then remains super fickle and intermittent. I sometimes do not have any data moving whatsoever (offline dinosaur in chrome level) When i connect to wifi again, all is fine, instantly.
I have full signal (full bars).
Mobile data on.
Switch to mobile data on.
The correct network registered & the correct APN for that network is set.
I have it set to GSM/WCDMA/ LTE auto
I have tried setting RAT set to every possible combo and it still continues!
I read somewhere it could be caused by radio initiation, so i went in *#*#4636#*#* to run a ping test but "phone information" throws up an error "This application does not work on this device"
Im 95% certain it is unlocked because i I bought the phone in another country and just popped my new sim straight in without hassle.
The mobile data issues started almost immediately. Now im stumped as what to do.
Any suggestions would be greatly appreciated and rewarded with beer :good:
THANKS!!!

In Developer Options, try switching on the "Agressive WiFi to Cellular Handover" option.

LPMatt said:
In Developer Options, try switching on the "Agressive WiFi to Cellular Handover" option.
Click to expand...
Click to collapse
Thanks. I will try that and trial run it over the next few days. The issue also occurs randomly while out on LTE or 3G. I will take my phone out to check google or whatsapp and nothing will send. So as your suggestion may be a work around, i doubt it will be a solve.
Will let you know how it goes

deathcells said:
Thanks. I will try that and trial run it over the next few days. The issue also occurs randomly while out on LTE or 3G. I will take my phone out to check google or whatsapp and nothing will send. So as your suggestion may be a work around, i doubt it will be a solve.
Will let you know how it goes
Click to expand...
Click to collapse
No change or improvement to the connection

Bump for anymore help from anyone. Please??
Getting desperate here....

deathcells said:
Bump for anymore help from anyone. Please??
Getting desperate here....
Click to expand...
Click to collapse
Does the phone have the right bands for 4G in your country?

Thanks for the reply!
Not sure, how do i check that?

aioan said:
Does the phone have the right bands for 4G in your country?
Click to expand...
Click to collapse
Thanks for the reply!
Not sure, how do i check that?

deathcells said:
Thanks for the reply!
Not sure, how do i check that?
Click to expand...
Click to collapse
go to settings, system, about phone, hardware info and check the model number.
For example I have LG-H870 (European bands, single SIM model).
I see you have dual sim so probably model H870DS and this should have enough bands to work well in Europe and Asia. Check here:
https://www.teamandroid.com/2017/04/15/lg-g6-model-numbers-variants/

aioan said:
go to settings, system, about phone, hardware info and check the model number.
For example I have LG-H870 (European bands, single SIM model).
I see you have dual sim so probably model H870DS and this should have enough bands to work well in Europe and Asia. Check here:
https://www.teamandroid.com/2017/04/15/lg-g6-model-numbers-variants/
Click to expand...
Click to collapse
Thanks for that. Yes according to this https://www.frequencycheck.com/carr...0ds-g6-dual-sim-td-lte/mtn-group-south-africa
I do have the correct bands. Could a carrier lock only one of the slots rendering it single sim in effect? The one sim works perfectly, second sim, no dice

Sorry for bumping an old thread.
Gf is having a similar issue on her phone; long story short, it happens that sometimes, after being connected to Wi-Fi and turing it off, it takes ages for her to get a mobile data connection, despite having full signal.
I had her replace the SIM, as I've seen similar problems (intermittent data connection, phone appears connected but no Internet available, etc.) with a SIM card that was about to go bad; it didn't help. Next step would be a full phone reset.
@deathcells : did you find the cause of your issue?

@fagentu.xda
No unfortunately not. I just deal with it. Extremely frustrating standing in the shop trying to pay without internet...
I tried the settings and force options to no avail.
I tried using both sim cards (from different providers) in both slots for months and no combination ever worked for me. I have yet to figure out if i bought a dudd phone or if a work around exists. Please let me know what you find out! Thanks and best of luck

Have the same issue with mine now. It started to go bad a few weeks ago... Tried everything. Changed SIM card, factory reset, etc... and nothing will change.
I'd say that the phone is just faulty. As I'm still under the warranty I'm in contact with LG to find out about a possible fix or phone replacement. I'll try to keep you posted.

Have you guys find a solution for this? I cant do anything. Does flashing kdz to andriod 9 pie helps?