Very weird signal problems.... - Samsung Galaxy S7 Edge Questions and Answers

Hi all, tearing my hair out here and can't find an answer anywhere about my issue... Basically my. Phone displays emergency calls only,even though I have signal. My cellular data is gone. I have found that if I select 3g only my data and signal comes back and all works fine again. As soon as I select lte 4g the emergency calls only starts again and I can't use my phone. Phone was rooted and working fine. I have reset to factory settings today and then set my phone up again(which resulted in me losing all my documents and photos as I could not back it up...) problem still there though. I'm. Gutted as I've only had the phone a couple of months. Please if someone could help me out here.
Sent from my SM-G935F using Tapatalk

JON35Y said:
Hi all, tearing my hair out here and can't find an answer anywhere about my issue... Basically my. Phone displays emergency calls only,even though I have signal. My cellular data is gone. I have found that if I select 3g only my data and signal comes back and all works fine again. As soon as I select lte 4g the emergency calls only starts again and I can't use my phone. Phone was rooted and working fine. I have reset to factory settings today and then set my phone up again(which resulted in me losing all my documents and photos as I could not back it up...) problem still there though. I'm. Gutted as I've only had the phone a couple of months. Please if someone could help me out here.
Sent from my SM-G935F using Tapatalk
Click to expand...
Click to collapse
Have you consider that it can also be from your network provider

I haven't really as it seems to work ok with 3G. Seems more software or hardware. Was hoping someone had seen this before?!

Related

No internet

Both before and after the ota update, my internet icon will disappear, making my phone unable too use the internet (obviously), send texts, and sometimes even not let me make our receive phone calls. Why I do not know. I am sending this message on wifi right now, because my phone has both no internet and also no radio signal. I'm at my house and my house always has full reception and I get H for the internet. If anyone can help or direct me too something I can do that would be great.
I did call tmous and they said I had the my touch internet package and switched me to general android, but this did not help my problem. Thanks
Sent from my T-Mobile G2 using XDA App
It can take up to 4 hours for any web changes to take effect. Maybe give it more time.
Also try *#*#4636#*#* - Phone information - and WCDMA preferred. Make sure wifi and wifi calling disabled because it will keep it at GSM only.
Hope this helps.
I called and did the internet switch yesterday morning. As for that stat number thing, after I pressed it everything came back on. Don't know if it was coincidence or not.
Will have to check again when out happens. What early am I looking for?
Sent from my T-Mobile G2 using XDA App
I'm having the exact same problem. In my house I can get fair hspa+ 2-4 bars, 3G who nows as we don't have a 3G notification icon. Edge when it works is 4-5 bars. My wife has the Blackberry Bold also from T-Mobile and she has a solid 3G all the time.
I already changed my device once and the new one now 2 days old has the same issues. It is really starting to annoy me as many times I get ready to use the internet and I just have a signal bars with nothing to the left and internet and email are not working. This also means my email does not sync up properly when the connection is lost.
I'm going to try and spend some time in another area and see if the problem is the same. If so I might have to give up on this device, I hate to as I really like it.
Unfortunately being in different areas does not make a difference. I love this phone as well but this is very aggravating. What causes this to happen? No other htc phone I have used or friends have used have this problem.
Sent from my T-Mobile G2 using XDA App
Steve.Beanz said:
I called and did the internet switch yesterday morning. As for that stat number thing, after I pressed it everything came back on. Don't know if it was coincidence or not.
Will have to check again when out happens. What early am I looking for?
Sent from my T-Mobile G2 using XDA App
Click to expand...
Click to collapse
Sorry I am having a hard time understanding what you are asking.
You go to the the dialpad on your phone. Enter *#*#4636#*#*
As soon as you do this it will bring up a menu. Tap on "Phone Information"
Then at the bottom you will see a dropdown box under "Set preferred network type:"
Set this to WCDMA preferred. Then hit the back button (the back arrow).
You will see that your signal has been disabled for a second, then will turn back on. Also if you can note down what it was set to before you changed it to WCDMA preferred and post that here.
Like I said this can only be done when wifi and wifi calling are disabled.
Hope I was a little more clear this time.
Well I may have to eat my words. It might be my location or just crappy T-Mobile service that is varying. I put my wifes phone in the same part of the house side by side of mine and trying to surf the web it dropped out too. Lost the 3G and got a SOS for signal bars. Unlike my G2 it recovered fairly quickly as the reception came back. My G2 has been at a loss for internet for over a hour before.
I'm still going to try some comparisons in some different ares and I hope it is just my area.
@bishybob wcdma prefered is checked.
Sent from my T-Mobile G2 using XDA App

Problem in making calls - works only if GSM 900 band is selected

Hi all
I am having a problem lately in making/receiving calls. The only easy the problem is solved is by using the band GSM 900. If the band selection option is set to determine automatically then I face the problems although the network is full.
The band selection is changed using *#2263#.
Note that the phone was working fine with the default band settings until one day I lost my emi and then had the samsung service centre restore it.
Have been having toys problem since then.
Any solutions?
Sent from my GT-I5801 using XDA App
i have a very similar problem. my issue also started a few days ago. only, i haven't tried using that frequency band that you mentioned. the thread that i started here didn't get too many replies, but i googled stuff and i found out that the issue is with the data connection.
try disabling the data network mode whenever you're not doing it. that has solved the problem with me so far. but, if you do find a way where you can use the data network mode and make calls easily, let me know also please.
thanks.
EDIT : i think you mean IMEI. and i didn't lose it. how did you manage to lose yours? i thought flashing was safe. which version of what ROM are you using now? and which were you using before?
Yes IMEI was what i meant. Did something stupid to loose my IMEI. And yes flashing is quite safe and does not touch your IMEI.
Was using DDJP2 when this issue started. And have flashed many roms but the issue still remains.
And i dont use any data network so my data network mode is also in disconnected mode.
And to further describe my problem.. when i make a call to a nokia phone the call almost gets connected and the nokia phone also gets lighted on with the small lock sign coming up... but the call does not connect completely ....
The only solution i could find (after weeks of digging) is to default the band selection to GSM 900... but i am sure that there should be a better solution for this.
I was using using eclair when my issue started. then i upgraded to froyo DDJP2 and my issue went away :/
but it has started again off late, no matter which ROM i use. I tried doing what you suggested, that is to set the default band to GSM 900. but that only for incoming calls. as in, i can receive all calls properly but my outgoing is still faulty. it just dials and then the "call ended" screen comes with the dial and message buttons. and when the data network mode is activated (it is by default. are you sure yours is switched off?) for me, my calls barely ever go through. there is a significant improvement when it is deactivated.
I'm looking for a better way out too.. I'll let you know if someone helps me out either. Good to know i'm not the only one here who has the issue.
Yes am sure.. the network data mode is always deactivated for me here.
Yes hopefully we can get some better solution here.
I lost my IMEI..samsung repaired my imei...nut im not getting calls or sms....even out going calls also.........plss help mee
i am havin a similar problem , sometimes (a lot ot times) people call me and my phone seems to be closed to them , but it works normally :S , that problem started when i flashed the phone and it remained after i flashed a lot of roms (even after factory reset) , and i cant understand if its a software issue or a device problem..
i would appreciate any help
and now i'm facing the issue even when the 900 band is selected (but data network mode is activated, which i don't want to disable because of whatsapp and ebuddy and gmail and tTorrent)
wondering if any recognized developer could help us out with this problem..

Mobile data issue

My note4 almost always has a white 3g above the service bars. However, even though I still have 3G and there is no change in service bars, periodically my text messages will not send and internet will not work. Keep in mind that my phone constantly says it is connected to 3G. It also happens that the signal bars disappear. After reboot both are OK. *
I do not have any malicious*apps*and my phone is not rooted. Have messed with network settings and have seen no change.
And YES my mobile data is turned on.
Any help is appreciated!
I have the same problem, right now I am trying to figure out if it's software or hardware related...
I would hazard a guess that it is sim card related.
Sent from my SM-N910F
I changed my SIM card, same problem.
What are your APN settings? What geo area are you in?
I am from Romania. My APN settings are default from the provider (Orange).
torokzsolt84 said:
I am from Romania. My APN settings are default from the provider (Orange).
Click to expand...
Click to collapse
I'm also with Orange Romania and I don't have problems (yet).
pedmond said:
I'm also with Orange Romania and I don't have problems (yet).
Click to expand...
Click to collapse
You got your phone from Orange? It never happened to you that it looks like the phone has signal, but in fact the signal froze and I cannot make a call or to be called. After a restart it's ok for a while. Also if I turn mobile data off is ok.
torokzsolt84 said:
You got your phone from Orange? It never happened to you that it looks like the phone has signal, but in fact the signal froze and I cannot make a call or to be called. After a restart it's ok for a while. Also if I turn mobile data off is ok.
Click to expand...
Click to collapse
I got it from cel.ro. A couple of times it took a few seconds to start dialing, but I had no real problems yet.
csutikisx said:
My note4 almost always has a white 3g above the service bars. However, even though I still have 3G and there is no change in service bars, periodically my text messages will not send and internet will not work. Keep in mind that my phone constantly says it is connected to 3G. It also happens that the signal bars disappear. After reboot both are OK. *
I do not have any malicious*apps*and my phone is not rooted. Have messed with network settings and have seen no change.
And YES my mobile data is turned on.
Any help is appreciated!
Click to expand...
Click to collapse
If have exactly the same issue !!!!
Start with full signal strength and going down to the lowest strength and minutes later no signal !!!
Reboot or Airplane mode can undo this, but the cycle starts allover: Full strength, less strength and no signal.
Tried with 3 different carriers !!
And 2 Note 4's !!
I have the Snapdragon version SM-N910F
What is going on ??
Have this issue with my exynos variant in australia its imported and full 3g signal and slow or no data throughout and sometimes h+ even g or nothing
Next week samsung will come to me and bring my phone to their service and will check whats going on. Anyway I think it's more like hardware issue than software.
I have the same issue with exynos variant I bought the fone from the official dealer in my country,
My data service was not working at all.
I got it working by going to mobile network and choosing WCDMA/GSM option instead of LTE/WCDMA/GSM. although now i cannot get 4g but at least the data is working on H or H+
I think its software as a few people have had this issue both variants also
Same problem here, Exynos factory unlocked SM-N910H. All of a sudden I look at my phone and I discover it's showing "Emergency calls only", sometimes H or H+ but no internet. A reboot OR Airplane mode OFF and then ON will solve both problems. That's ridiculous... I've literally tried everything, factory reset, changed sim, messed with the APN settings. I've had this problem since day 1, even before I rooted it. Darn this, I never had any problems with my HTC One X, and I am using it ATM until Samsung come up wit a fix with an update or something. I hope it's not hardware related as my Knox warranty is void 0x1. :crying:
The same issue happened to me. I have 910c variant from Lithuania. A week ago phone started to lose 4G and after few minutes "no signal". Few reboots and it is working again, but after some minutes there is no signal. What I did notice is that there was no signal problem in my city centre where 4G signal is very strong, but when I did some speed test there, it was only ~2-3mbit (before this problem it was ~50-60)... Unfortunately I did not test this issue by turning off 4G. I did deliver my phone to warranty service 5 days ago and they send phone to Latvia to do 4G tests. I refused to repair my phone and demanded to get new phone. Waiting for the answer
Also rooted my phone so no warranty for me. Changed carriers today and they are doing upgrades so stuck with useless service :/ but i think either it's something to do with root or software i dont think its hardware
---------- Post added at 10:42 AM ---------- Previous post was at 10:40 AM ----------
Fuxas plz reply to.this thread when you hear back thanks
I dont think it is software, because I tried factory reset and it did not help.. Of course, when I get the results I will share them here.
If anything it's NOT the root because I am having this issue before I ever rooted it. My best guess it's the software and I've researched a lot about this problem, seems it's specifically related to some samsung devices and not only the Note 4.
Yup its a samsung problem and hopefully it gets rectified

[Moto G4 with Amazon ads] Always losses carrier network after 24 hours

Hello everyone,
I just bought a Moto G4 16 GB with Amazon Ads for my wife, but we are facing a very annoying problem: the carrier signal always dies after 24 hours give or take. We tested with a different SIM card and the same thing happened. When this happens the device only shows "Emergency Calls Only" and we have to reboot the phone in order to get the signal back.
So, is anyone else facing this problem? Is this really a problem with this phone in particular or every moto g4 has this problem? Should I return the device to amazon?
Thank you very much for any information you can give me!
Zadornov said:
Hello everyone,
I just bought a Moto G4 16 GB with Amazon Ads for my wife, but we are facing a very annoying problem: the carrier signal always dies after 24 hours give or take. We tested with a different SIM card and the same thing happened. When this happens the device only shows "Emergency Calls Only" and we have to reboot the phone in order to get the signal back.
So, is anyone else facing this problem? Is this really a problem with this phone in particular or every moto g4 has this problem? Should I return the device to amazon?
Thank you very much for any information you can give me!
Click to expand...
Click to collapse
No problems here since I got my phone last week and I have T-Mobile. You might have to check your apn settings with your carrier.
Caltinpla said:
No problems here since I got my phone last week and I have T-Mobile. You might have to check your apn settings with your carrier.
Click to expand...
Click to collapse
I tested the SIM card in a different phone and it worked flawlessly (I also use T-Mobile). The strange thing is that the phone gets the signal very well during more or less one day, after that I have to reboot to get signal again.
Well, this is probably a problem in the device. I already asked Amazon to send a replacement.
Zadornov said:
I tested the SIM card in a different phone and it worked flawlessly (I also use T-Mobile). The strange thing is that the phone gets the signal very well during more or less one day, after that I have to reboot to get signal again.
Well, this is probably a problem in the device. I already asked Amazon to send a replacement.
Click to expand...
Click to collapse
Try my APN settings to see if it helps, but locations very important
Zadornov said:
I tested the SIM card in a different phone and it worked flawlessly (I also use T-Mobile). The strange thing is that the phone gets the signal very well during more or less one day, after that I have to reboot to get signal again.
Well, this is probably a problem in the device. I already asked Amazon to send a replacement.
Click to expand...
Click to collapse
I also have the cellular data always active checked off
Caltinpla said:
Try my APN settings to see if it helps, but locations very important
Click to expand...
Click to collapse
Thank you, but I just use the t-mobile network. In fact, my carrier is called campusSIMs and it is a MVNO that uses t-mobile network. So, my APN configs are a bit different from yours.
However, I didn't know about this mobile data thing. I didn't touch the developer options. Maybe, it can be a good idea.
Thank you!
It won't be your APN settings since that controls your data settings. If the sim is ok then it could be your phone.
Sent from my SM-T530NU using XDA-Developers mobile app
I'm seeing a similar problem with the data portion of the network (also on T-Mobile). While I'm able to send and receive calls and texts, data doesn't work. There's no indication that it's attached to LTE or even 3G (just a standard signal bar with no other information). I moved the SIM card back to the old phone it was in and it works fine.
Things actually worked yesterday, so something happened overnight to break it.
Damaniel said:
I'm seeing a similar problem with the data portion of the network (also on T-Mobile). While I'm able to send and receive calls and texts, data doesn't work. There's no indication that it's attached to LTE or even 3G (just a standard signal bar with no other information). I moved the SIM card back to the old phone it was in and it works fine.
Things actually worked yesterday, so something happened overnight to break it.
Click to expand...
Click to collapse
That could possible be the APN settings. Although usually it's the opposite, they don't work at first then they update from the network later on. Most times the APN settings will set themselves but on the odd occasion they need to manually edited. I don't use T-Mobile but the APN settings are easy enough to find.
Damaniel said:
I'm seeing a similar problem with the data portion of the network (also on T-Mobile). While I'm able to send and receive calls and texts, data doesn't work. There's no indication that it's attached to LTE or even 3G (just a standard signal bar with no other information). I moved the SIM card back to the old phone it was in and it works fine.
Things actually worked yesterday, so something happened overnight to break it.
Click to expand...
Click to collapse
Sounds like you need to manually enter the APN settings. What you describe is exactly what happens when it hasn't loaded an APN.
I'm "kinda" having an issue here. It's a little different though; the phone works ok for a while (for me about 3 hours, usually), and then I still get an LTE indicator, but have no network connection (get errors in apps/"No internet" page in chrome).
Other times, I lose LTE and get locked in 3g (H indicator), and can only get LTE back by going to Settings/More/Cellular Networks/ and toggle preferred network mode to 2g or 3g, let it connect (H or E), then toggle back to LTE.
Motorola responded to a bad Amazon review requesting I post asking for help on their forums.
Relevant link:
https://forums.lenovo.com/t5/Moto-G...ction-with-LTE-and-strong-signal/td-p/3377242
I'm active over on their forums also and it's good to post over there in case you ever want to do a soak test. They look at your posts there when they ask for soak testers. As for your problem, I've seen it shift back and forth if you are in an area between towers and one isn't sending out LTE. If it were that I wouldn't think you'd get it back so easily. There's an app, don't remember the name, that will show the towers and signal relative to your location, If might be interesting to look at that.
Having the same issue with radio. Just replied to your post, Kalash.
Ok, we got a new phone from Amazon and it has the same problem. So, I believe this phone does not work very well with MVNOs.
I notice that the problem is that the phone cannot reconnect to the network after losing the signal. For example, if you go to an area with bad signal and, eventually the signal vanishes, the phone will not be able to reconnect to the carrier network. The phone only reconnects after reboot. Airplane mode does not solve the problem.
This does not happen with my Blu Life One X. So, I think it is a software problem.
Zadornov said:
Ok, we got a new phone from Amazon and it has the same problem. So, I believe this phone does not work very well with MVNOs.
I notice that the problem is that the phone cannot reconnect to the network after losing the signal. For example, if you go to an area with bad signal and, eventually the signal vanishes, the phone will not be able to reconnect to the carrier network. The phone only reconnects after reboot. Airplane mode does not solve the problem.
This does not happen with my Blu Life One X. So, I think it is a software problem.
Click to expand...
Click to collapse
That's not true on all mvnos' apparently. My wife's phone is on Consumer Cellular, an AT&T mvno and it's never done that. We've been in a no service area several times and it's always connected immediately when getting service back.

Can't get signal on GRA-UL10

Hi, I need urgent help as I can't get a signal on my P8. I'm in the UAE using Etisalat and my phone is not getting a signal on C185B385 or Arrow ROM. It just happened without me doing anything. I've tried wiping data and it has not fixed the problem. I do have IMEI but it's always on emergency calls only. I don't think I was blacklisted my carrier either as I have transferred my SIM to my old LG G3 and it's receiving 4G signal.
Please help, thank you!
Many people are having a no signal problem with the huawei p8, atleast with 3g. Seems like there is no solution yet.
My 4g works and i can text. But if i try to make a call or change to 3g and 2g only I get no service.
melonsmasher100 said:
Many people are having a no signal problem with the huawei p8, atleast with 3g. Seems like there is no solution yet.
My 4g works and i can text. But if i try to make a call or change to 3g and 2g only I get no service.
Click to expand...
Click to collapse
The thing is, 4G doesn't work, nor does 3G. Huawei sure is great with their phones *obviously sarcasm* If I get a new phone, it surely won't be Huawei and will probably never be.
Although, I have discovered a workaround in which you put the SIM card in Slot 2 and set 4G to Slot 2, then put it back in Slot 1 and leave the 4G option in Slot 2. Sadly, it's only 2G but hey at least it works and saves a bit of battery with only 2G. But I need 4G, so I put my SIM in my good old G3.
Well my phone only has 1 slot so for me that wont work ._. (Gra-l09) I actually was lucky enough to win a huawei p10 that i will receive in 2 weeks. Hope i don't get the same problem. If I do I will never buy from huawei again either.
melonsmasher100 said:
Well my phone only has 1 slot so for me that wont work ._. (Gra-l09) I actually was lucky enough to win a huawei p10 that i will receive in 2 weeks. Hope i don't get the same problem. If I do I will never buy from huawei again either.
Click to expand...
Click to collapse
Woah that's great! Let's just hope your P10 won't have a problem because my cousin won a Huawei Nova Plus from a photography contest hosted by Huawei. And the phone reboots when he uses GPS lol. Again with Huawei's "great" engineering.
Try to reflash the stock rom and the stock recovery.
Tried to do that. Doesn't seem to work though. It also happened to me without me doing anything. Used fromfuture-home rom for a couple of weeks. Then calling gradually stopped working so I could only call sometimes. I thought it was my carrier so I made so many calls to them but they said nothing was wrong. Also tried to change sim. Now it does not work at all. I found a quick fix that worked for a while which was putting the phone in the freezer for a while. Feels like build 3xx for some huawei p8s causes a hardware fault. Everyone who has got this problem got it at about the same time.
Right now I'm using cyanogenmod flashed on top of 100% clean b321
I have the same problem in my P8: i have internet and wifi but i can`t make any call nor receiving
I flashed stock rom C900B370 without results
MelonsMasher, does cyanogenMod solve the problem?
Thanks a lot
My Huawei P8 (HUAWEI GRA-UL00) doesnt pick up 3G signal as well. One of the SIM slots is set at GSM only and it works perfectly fine. The other SIM slot is set at LTE/WCDMA/GSM auto but it can only access 4G only. When i try to call, it fails. When i set my SIM slot at WCDMA/GSM auto, it says 'Emergency Only'. I can be able to access data but no calls because, the system must fall back into 3G inorder to make a call.
What is the solution to this? It happened for me few times in the past and I have to hard reset the phone to get it back to normal. But then, all my contacts, pics and whatever i stored in my phone including email and social networking sites will be lost as well meaning I have to start all over again. Is there any way to solve this and not getting rid of what is stored in the phone already?
Thank you.
I may have to change my phone to other Brands if this issue is not solved.
Concerned User.

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