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[Q] Help needed! I bought my third I337 however it is giving me network problems!

I just bought a used I337. It was on firmware UAMDL.
The problem that I have with this phone(i337 on UAMDL) that I just got is that it does not establish data connection. It will only do so when I call somewhere.
However as soon as the phone is left alone and go idle for couple minutes then it would drop data connection again.
Only way to re establish data connection is by dialing a number to place a call.
Anybody know how to fix this annoying problem?
I have also noticed the original owner made a copy of efs back up in the internal sd card.
I wonder why he created such back up. Could this be related to the issue that I am having?
I have 2 other i337 in the household that are pe rfectly fine.
IS there anything that I could do to fix the phone that I just bought.
Please help!

sharpeyedman said:
I just bought a used I337. It was on firmware UAMDL.
The problem that I have with this phone(i337 on UAMDL) that I just got is that it does not establish data connection. It will only do so when I call somewhere.
However as soon as the phone is left alone and go idle for couple minutes then it would drop data connection again.
Only way to re establish data connection is by dialing a number to place a call.
Anybody know how to fix this annoying problem?
I have also noticed the original owner made a copy of efs back up in the internal sd card.
I wonder why he created such back up. Could this be related to the issue that I am having?
I have 2 other i337 in the household that are pe rfectly fine.
IS there anything that I could do to fix the phone that I just bought.
Please help!
Click to expand...
Click to collapse
Did you check to make sure you have the right apn setup? in settings under mobile networks access point names make sure they are the same as one of your working phones....

Have you Odin'd the stock firmware? I'd do that with a used phone I bought.

[SOLVED]
jd1639 said:
Have you Odin'd the stock firmware? I'd do that with a used phone I bought.
Click to expand...
Click to collapse
yes.
Gage_Hero said:
Did you check to make sure you have the right apn setup? in settings under mobile networks access point names make sure they are the same as one of your working phones....
Click to expand...
Click to collapse
Thank you. It sounds silly but this solved the problem.
I don't know why it wanted me to reset or re input APN when it was set to pick it up auto and it did when placing calls.
Now it picks up connections auto and stays on.

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]

I have a n9005 XEO that i bought on ebay. it was working fine for about 5 months now until a few days ago when it just stopped getting cellular signal altogether. no calls, no data, nothing. it seemed to corespond to me using towlroot, installing supersu, and a couple of xposed add-ons, but everything seemed to work fine for a few days before i had this problem. I tried making sure that airplane mode was off, data was enabled, that i had the apn settings correct for my provider (at&t, USA), I even went so far as to restore to factory settings, and then flash another rom (the stock s5 port i found here in the dev forum). still not getting cell signal at all). I went so far as to go to the local at&t store and ask them to place my sim in a known good phone to make sure it has service (and it does and is provisioned properly and i'm paid up). my note sees the sim (i.e. no "sim not found" messages), just plain no service as if i were in a dead zone. the phone hasn't been mishandled, i've tried pulling the battery and putting it back in... I can't think of anything i'm missing here besides trying to flash the modem (which i can't seem to find the stock modem (n9005xxuenc2) or firmware on a site that doesn't take 7 hours to download it from.
can anybody help? (either with a mirror that doesn't suck for the latest stock firmware or latest stock modem, or offer any other suggestions?)

cpgeek said:
I have a n9005 XEO that i bought on ebay. it was working fine for about 5 months now until a few days ago when it just stopped getting cellular signal altogether. no calls, no data, nothing. it seemed to corespond to me using towlroot, installing supersu, and a couple of xposed add-ons, but everything seemed to work fine for a few days before i had this problem. I tried making sure that airplane mode was off, data was enabled, that i had the apn settings correct for my provider (at&t, USA), I even went so far as to restore to factory settings, and then flash another rom (the stock s5 port i found here in the dev forum). still not getting cell signal at all). I went so far as to go to the local at&t store and ask them to place my sim in a known good phone to make sure it has service (and it does and is provisioned properly and i'm paid up). my note sees the sim (i.e. no "sim not found" messages), just plain no service as if i were in a dead zone. the phone hasn't been mishandled, i've tried pulling the battery and putting it back in... I can't think of anything i'm missing here besides trying to flash the modem (which i can't seem to find the stock modem (n9005xxuenc2) or firmware on a site that doesn't take 7 hours to download it from.
can anybody help? (either with a mirror that doesn't suck for the latest stock firmware or latest stock modem, or offer any other suggestions?)
Click to expand...
Click to collapse
Type in *#06# on your dialer. Do you get the same IMEI number as the one behind your battery?

Affirmative. The IMEI numbers match

cpgeek said:
Affirmative. The IMEI numbers match
Click to expand...
Click to collapse
Tell me your model number, country and if you know the region type it out.
I'll download it from Sammobile and mirror it to your through MEGA.
Type in *#1234# and tell me the values.

nicholaschum said:
Tell me your model number, country and if you know the region type it out.
I'll download it from Sammobile and mirror it to your through MEGA.
Type in *#1234# and tell me the values.
Click to expand...
Click to collapse
it's an n9005 xeo from poland, I'm in the USA on AT&T. I downloaded the firmware successfully from sammobile and installed it with odin 3.07 which seemed to go successfully but I still get absolutely no cellular
I've tried using the default apn, tried using at&t's apn settings (which i remember having to do last time before i got data but i'd always been able to make calls and that's not working right now either), no effect...
anybody have any ideas?

cpgeek said:
it's an n9005 xeo from poland, I'm in the USA on AT&T. I downloaded the firmware successfully from sammobile and installed it with odin 3.07 which seemed to go successfully but I still get absolutely no cellular
I've tried using the default apn, tried using at&t's apn settings (which i remember having to do last time before i got data but i'd always been able to make calls and that's not working right now either), no effect...
anybody have any ideas?
Click to expand...
Click to collapse
So you're saying it worked perfectly for 5 months, and then suddenly it went haywire on you? Did you do any major changes before it happened?

I also tried flashing the XXUENC2 and ZHUENB5 modems from here with no effect.
still looking for a solution

nicholaschum said:
So you're saying it worked perfectly for 5 months, and then suddenly it went haywire on you? Did you do any major changes before it happened?
Click to expand...
Click to collapse
as i noted I rooted it with towlroot, installed supersu, and a coupe of xposed add-ons. but everything was working afterwards for about a week before i had this problem. otherwise, I was using my phone one night, i wake up, and see that i have no service. it was after a big storm so i figured they were doing service on the tower, until my work iphone rings (on the same network) and that feeling of dread set in so i went about trying to diagnose the problem and here i am.

cpgeek said:
as i noted I rooted it with towlroot, installed supersu, and a coupe of xposed add-ons. but everything was working afterwards for about a week before i had this problem. otherwise, I was using my phone one night, i wake up, and see that i have no service. it was after a big storm so i figured they were doing service on the tower, until my work iphone rings (on the same network) and that feeling of dread set in so i went about trying to diagnose the problem and here i am.
Click to expand...
Click to collapse
despite having done nothing unusual to the hardware, I've flashed modems (stock and otherwise), i've flashed roms (stock and otherwise) and it doesn't appear to effect my situation, so I can't help but think that this could be hardware related... I'm stuck and sad.

anyone have any other great ideas for me or am I buying another one?

cpgeek said:
anyone have any other great ideas for me or am I buying another one?
Click to expand...
Click to collapse
I think the phone could be blacklisted, confirm it via at&t/reputable website with the imei #.

ddogishere said:
I think the phone could be blacklisted, confirm it via at&t/reputable website with the imei #.
Click to expand...
Click to collapse
even if it were blacklisted, it should still allow me to place 911 calls and the like. it should work like a deactivated phone. it's not. just in case i was wrong, I also verified the imei on swappa and they confirm that it is indeed NOT blacklisted.
also i'm not sure why it would be blacklisted to begin with. it was working one day then i went to use it the next and bam, not working. i don't get it.

cpgeek said:
anyone have any other great ideas for me or am I buying another one?
Click to expand...
Click to collapse
Sounds like your IMEI got tampered or stolen and got blacklisted. Usually this would happen, especially when buying phones online.

nicholaschum said:
Sounds like your IMEI got tampered or stolen and got blacklisted. Usually this would happen, especially when buying phones online.
Click to expand...
Click to collapse
But I've used several reputable services to check my IMEI number and they all say that my imei is in good standing... I don't get it. besides, what causes an imei to be blacklisted to begin with? - I wasn't trying to circumvent any security features, had no malware, no reason at all for an accounts admin to want to get me off the network. my account is in good standing, and my sim still works in an old iphone that i've got (i'm using that until i can sort out my regular phone situation).

cpgeek said:
But I've used several reputable services to check my IMEI number and they all say that my imei is in good standing... I don't get it. besides, what causes an imei to be blacklisted to begin with? - I wasn't trying to circumvent any security features, had no malware, no reason at all for an accounts admin to want to get me off the network. my account is in good standing, and my sim still works in an old iphone that i've got (i'm using that until i can sort out my regular phone situation).
Click to expand...
Click to collapse
The fact that someone had the phone with them can easily get it stolen. It's a plain 15 digit number, easily forgeable just by looking at the box, and since it has no authentication, people can just get your phone blacklisted by placing it on a defunct phone that hacks the network (or something).

well tonight i took it apart to see if there was a problem with the antenna cables, connections to the various peripheral devices and such and alas, no effect... still does exactly the same thing after field stripping the unit and resenting everything. if it's hardware, it's nothing i can tell...
I was also able to generate a .pit file, grab the latest build for my csc from sammobile (takes forever) and did a nand erase in odin with the pit and the downloaded stock rom... everything went great, but it got me to exactly the same place i'm at... working phone, no service. I have no money, but i think i'm going to just end up ebaying it and buying an s3 until i can save up enough for a note 4 or nexus 6... for now, i'm on a crappy old iphone 4 with a broken lock button, but that's another thread.

well it's been about a month and a half since i've had a decent phone (my 3 phones ago iphone 4 really doesn't cut it). after giving it some thought, I think i might buy a broken-screen sm-n900t, and swap it's mainboard into my phone. hardware-wise i believe they are exactly the same, it should be easily rooted with unlocked baseband,it would give me LTE on at&t, and it should be easily unlocked so i can use it on at&t... it should also only cost me 1/8 the cost of a good condition used n900t. ($60 or so on ebay i hope?).
still pretty sad that such a nice phone quit on me so quickly

cpgeek said:
well it's been about a month and a half since i've had a decent phone (my 3 phones ago iphone 4 really doesn't cut it). after giving it some thought, I think i might buy a broken-screen sm-n900t, and swap it's mainboard into my phone. hardware-wise i believe they are exactly the same, it should be easily rooted with unlocked baseband,it would give me LTE on at&t, and it should be easily unlocked so i can use it on at&t... it should also only cost me 1/8 the cost of a good condition used n900t. ($60 or so on ebay i hope?).
still pretty sad that such a nice phone quit on me so quickly
Click to expand...
Click to collapse
Why don't you swap the N9005's screen onto the N900T and keep it like that? The N900T if I can recall, has the most bands available worldwide and if you're already replacing it, just enjoy the vast amount of customizations and potential the N900T has.

Did you pursue all avenue including Samsung service/repair centre or even Samsung line enquiry to confirm it's not blacklisted?

nicholaschum said:
Why don't you swap the N9005's screen onto the N900T and keep it like that? The N900T if I can recall, has the most bands available worldwide and if you're already replacing it, just enjoy the vast amount of customizations and potential the N900T has.
Click to expand...
Click to collapse
that's basically the plan, except the motherboard lives on the display side of things, so it would be swapping in a new motherboard (n900t). we both describe the same plan of action.

[Q] Samsung S4 I9506 - Not registred on network problem

My S4 I9506 is unlocked for all sim cards. I had no problems and it connected to my mobile network with problems. I updated to 4.4.2 KK and there I got problems.
When I enter my pin code, my phone wont connect to my mobile network. It says "mobile network misses" or " Not registred on network" etc. Sometimes about 50% chance of turning off and turning on, it connects to the mobile network for like 1 day and goes again. Then I have to switch and try it before it connects again..
NOTE!
- I have tried factory reset
- There is no SIM CARD problem, I tried mine on other phones like iPhone and my friends S4.
- I have tried to update firmware and install new firmware.
- I cleaned cache.
This seems to be no "inside mobile" problem because it sometimes connects for 1 day.
When im on mobile networks and get option to switch between LTE/WCDMA/GSM etc to another like WCDMA/GSM, it connects to it like 5 seconds and dissapear again and gets "Not registred on network"
There is no problem with the phone inside I believe, but something with firmware?
Any help please, appreciate that.

AlanMoa7 said:
My S4 I9506 is unlocked for all sim cards. I had no problems and it connected to my mobile network with problems. I updated to 4.4.2 KK and there I got problems.
When I enter my pin code, my phone wont connect to my mobile network. It says "mobile network misses" or " Not registred on network" etc. Sometimes about 50% chance of turning off and turning on, it connects to the mobile network for like 1 day and goes again. Then I have to switch and try it before it connects again..
NOTE!
- I have tried factory reset
- There is no SIM CARD problem, I tried mine on other phones like iPhone and my friends S4.
- I have tried to update firmware and install new firmware.
- I cleaned cache.
This seems to be no "inside mobile" problem because it sometimes connects for 1 day.
When im on mobile networks and get option to switch between LTE/WCDMA/GSM etc to another like WCDMA/GSM, it connects to it like 5 seconds and dissapear again and gets "Not registred on network"
There is no problem with the phone inside I believe, but something with firmware?
Any help please, appreciate that.
Click to expand...
Click to collapse
Hi ,
As i can see it from here after all you have done , there are two posibilities
the sim caddy
or problems in your EFS folder, did you checked your imei *#06# in your dialer , does it match , the one under the battery? even if it does it may be still something wrong with your efs,I had a similar problem and it was the EFS , do you have an EFS backup?

i have exactly same problem. im on 4.4.2 and cant make calls , or receive. not registered in network.
when register sometimes. it only works data 3g , 4g.
AP I9506XXUCNG3
CP I9506XXUCNF3
CSC I9506NEECNG3
my carrier is orange spain
please help to solve my problem.

The IMEI is exactly like the one under my battery. How do I fix with EFS? Thank You.

I know, it connects sometimes, but its a very low chance and it works like 1 day and cuts off. Getting not registred on network all the time.. There is no problem wrong with the antenna, because it actually connects sometimes, but cuts off again.
My data also works, even if it is written "not registred on network" It still works! It means that it actually connects to the mobile network, but some problems force it to not connect it completely ..

AlanMoa7 said:
I know, it connects sometimes, but its a very low chance and it works like 1 day and cuts off. Getting not registred on network all the time.. There is no problem wrong with the antenna, because it actually connects sometimes, but cuts off again.
My data also works, even if it is written "not registred on network" It still works! It means that it actually connects to the mobile network, but some problems force it to not connect it completely ..
Click to expand...
Click to collapse
Hi ,
your problem is not quite the one i had but they seem related , do you have an EFS backup?
My Imei number was good but i got no registred on network all the time after trying many diffeent things i decided to restore my EFS backup....once i did everything went back to normal
if you do not have en EFS backup you will have to go to Samsung ( is your warranty is still valid) or to a local service shop with a Z3X box or similar to fix it

I dont have EFS backup. I tried to root the phone because some forums said it may work to download ariza patch etc and now my KNOW is on 0x1, I think the warranty is out although.

AlanMoa7 said:
I dont have EFS backup. I tried to root the phone because some forums said it may work to download ariza patch etc and now my KNOW is on 0x1, I think the warranty is out although.
Click to expand...
Click to collapse
Hi,
If you do not have a EFS backup your only option would be a local service center , see if they have a Z3X box or similar it can be fixed with that..
Did you try to flash stock rom again just in case? is a long shot as EFS is not included there but there is nothing to lose

Thank you! Yes of course I tried stock, still did not work. Is there no possibilities to do it at your own? There are some tools for EFS I saw on XDA etc.

AlanMoa7 said:
Thank you! Yes of course I tried stock, still did not work. Is there no possibilities to do it at your own? There are some tools for EFS I saw on XDA etc.
Click to expand...
Click to collapse
Hi
The tool you see will work if you have a backup if not your best chance is a service shop with a box, it will cost you around 20 USD

[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.
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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).
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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.
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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!