Database Users

Gsm signal issue

I have my sgs for 2 weeks now. GSM disconnects around every 2 days.
At service mode (*#*#4636#*#* - Phone information) i can see this repport:
GSM disconnects:
====DATA=====
State: inactive
disconnected with last try
at 00:59
fail because No Error
The question is: why does this happen?
Is this an android issue or a hardware problem?
Any pointers?
Thanks in advance
.

do you ever enter a building, subway, or some other location where the GSM becomes poor?

AllGamer said:
do you ever enter a building, subway, or some other location where the GSM becomes poor?
Click to expand...
Click to collapse
That's not the problem.
Gsm disconnects just like that ,at home for instance. And when I notice that and try to reconnect (settings- wireless networks- mobile networks - networks operators) it doesnt find ANY of them.
Then I restart the phone and gsm network is back.
If I dont notice disconnection in time (so I can restart phone, people just cannot reach me....quite frustrating...

i see what you mean now.
yes, i've noticed that on mine too, but.... that's because i was fooling around with some new Apps Widgets settings i was testing to control the radio and data to save battery.
Did you install any new Apps recently that might cause that?

betoNL said:
That's not the problem.
Gsm disconnects just like that ,at home for instance. And when I notice that and try to reconnect (settings- wireless networks- mobile networks - networks operators) it doesnt find ANY of them.
Then I restart the phone and gsm network is back.
If I dont notice disconnection in time (so I can restart phone, people just cannot reach me....quite frustrating...
Click to expand...
Click to collapse
do you have an old sim card? i had a 3g sim card that wasnt even 1 years old and replacing it fixed connectivity issues on my nexus 1 and i had a similar experience with my old htc magic

AllGamer said:
i see what you mean now.
yes, i've noticed that on mine too, but.... that's because i was fooling around with some new Apps Widgets settings i was testing to control the radio and data to save battery.
Did you install any new Apps recently that might cause that?
Click to expand...
Click to collapse
Well I installed all kind of apps. but i have the feeling this problem was happening even before that.
And I dont need widgets to control data ( I think) because I set the sgs to use 2g networks only and I dont have apn configured( section is empty. Internet connec. only via wifi.
hondaguy said:
do you have an old sim card? i had a 3g sim card that wasnt even 1 years old and replacing it fixed connectivity issues on my nexus 1 and i had a similar experience with my old htc magic
Click to expand...
Click to collapse
Well, my sim card is VERY old (2002) and the carrier (Telfort) is roaming into another carrier's network (Kpn) with no extra costs of course like real roaming, but still roaming (I get the little "R" next to the signal strenght bars)
Anyway this never happened with the Nokia 5800xm running Symbian OS and using the same sim card...
Starting to get pissed of with Android...
With Symbian you hack or root or tweak because you want to, not because you NEED to like with Android....
And then you prob. get side effects...
Thank you guys for your time

I would get a new sim card if I were you. Every android phone that I have had seems to work better with a good 3g sim.

Get a new SIM card.

same problem, different phone
i have the same problem on kaiser with flashed android on it.
sim is 2 years old, and now suddenly this happened, tried differents sim cards, but the problem persists. My guess is, it is a software problem.
Maybe i will report when I flash original WM6.1 rom onto it, if you are interested in the result
btw, this happened about two days ago and because of this im buying galaxy s so i hope the problem will be gone with new phone

did you guys see this other topic?
http://forum.xda-developers.com/showthread.php?t=769582
anyone able to reproduce this issue?

Maranevim said:
i have the same problem on kaiser with flashed android on it.
sim is 2 years old, and now suddenly this happened, tried differents sim cards, but the problem persists. My guess is, it is a software problem.
Maybe i will report when I flash original WM6.1 rom onto it, if you are interested in the result
btw, this happened about two days ago and because of this im buying galaxy s so i hope the problem will be gone with new phone
Click to expand...
Click to collapse
Why you think the problem will be gone if it's still android and I also got it with my sgs? Or are you counting on Froyo?
Yesterday I upgraded my sgs to froyo jpc with kies. I am new with Android but the post of Aery was so clear that i didnt resist: http://forum.xda-developers.com/showthread.php?t=769400&highlight=froyo+upgrade
I did get stuck on reboot but could get out of it after applying a cache/data/factory reset on recovery mode (3 buttons)
Now I am being carefull with the 3rd party apps., and so far so good, no gsm disconnections .
Froyo is of course better that eclair but Android is still disappointing to me.
You flashed Android onto a WM device (i'm impressed); could you not teach me how to flash Symbian onto my SGS?
Voice dialing (over bluetooth or not) and proper connectivity control (network, data, gps and bluetooth) of android is years behind Symbian; and such a well written, light OS, it will just fly on a high-end hardware like the sgs; but that is an issue for another thread.http://forum.xda-developers.com/showthread.php?p=7938430#post7938430
Pls keep reporting..
AllGamer said:
did you guys see this other topic?
http://forum.xda-developers.com/showthread.php?t=769582
anyone able to reproduce this issue?
Click to expand...
Click to collapse
I think indeed that's not the same issue. My problem is that the radio signal get turned off during inactivity. That's why I got connection back after reboot: radio signal gets turned on again; later I learned how to turn radio signal back on without rebooting, but that is just a remedy , no real solution.
Try to upgrade to froyo, make a factory reset and be carefull with 3rd party apps. With froyo you will need less interfering tools anyway
I dont thing that my old sim card is the problem, but i'll try to replace it anyway...but first things first
Btw dou you have 3g turned on? Cause I never...
Another mistery: When I have 3G on I see those bars (signal strenght) dancing and that "death grip" thing happening:http://www.youtube.com/watch?v=LROTHrTR92k
But when I have it on 2G only the bars doesnt move even if I strangle it with both hands.....
Please repport later how it's going...

I had the same issue, i sent mine back and got my money back, i had also tried with different simcards and resets and nothing worked.. so hopefully my new galaxy wont have this problem. Its strange that these problems are so rare though.. But as long i get it going ill be a happy man.

fourth day with JPC ( and 4 days after a factory reset) so far so good no disconnections . I think problem is gone...
Today just to be safe, I got a new sim card....the other one was too old anyway(8 years)

i have the same issue, for a few days i can't get 3g. i'm seriously wondering about sending back my sgs. i've ttried all the settings, changed my sim..nothing...begin to think it was a fullish thing to change Desire to SGS..

alpachiles said:
i have the same issue, for a few days i can't get 3g. i'm seriously wondering about sending back my sgs. i've ttried all the settings, changed my sim..nothing...begin to think it was a fullish thing to change Desire to SGS..
Click to expand...
Click to collapse
Well... this is not the same issue.
I have 3G (WCDMA) disabled. I only use 2G (GSM) and WIFI for data/internet connection.
I Dont have a data account, I dont need it therefore I disabled 3G in order to save battery.
If you do want to use 3G, just go to settings - wireless and network - mobile network settings - network mode and set auto-mode (GSM/WCDMA or 3G/2G)
If it doesn't work, apply a data/factory reset and try again.
And if it doesnt work, it's probably hardware related and you should return it or send it for repair.
My issue is more complicated; next to the fact that I dont want to use 3g, my carrier is roaming to another network and probably Android OS or the firmware cannot handle it properly.
Android is still premature and the "Samsung - Android integration" seems to need a lot of development as well.
It is just a shame that basic functions like proper connectivity control just wont cut it. And Google is not doing any good either.
And dont let me get started on the voice recognition issue......
Hardwarewise, the SGS is superior that htc desire.....I wonder how it would perform if running Symbian^3 OS or Meego.....
I get a great sound quality from the stock music player just by mixing the equalizer and using the music clarity effect...just great...better than any other device I tried.
And the OFFLINE Gps experience is just great as well: the combination SGS - Motonav - External Bluetooth gps device is working like a charm.
I wouldn't change my sgs just yet......

yesterday i was swiching sims to determine if is a sim fault and suddenly i have my 3g/h back. happy owner again. i've tried all to do this, from firmware upgrade to servide mode settings..i don't know why but i'm ok again...

betoNL said:
Well... this is not the same issue.
I have 3G (WCDMA) disabled. I only use 2G (GSM) and WIFI for data/internet connection.
I Dont have a data account, I dont need it therefore I disabled 3G in order to save battery.
If you do want to use 3G, just go to settings - wireless and network - mobile network settings - network mode and set auto-mode (GSM/WCDMA or 3G/2G)
If it doesn't work, apply a data/factory reset and try again.
And if it doesnt work, it's probably hardware related and you should return it or send it for repair.
My issue is more complicated; next to the fact that I dont want to use 3g, my carrier is roaming to another network and probably Android OS or the firmware cannot handle it properly.
Android is still premature and the "Samsung - Android integration" seems to need a lot of development as well.
It is just a shame that basic functions like proper connectivity control just wont cut it. And Google is not doing any good either.
And dont let me get started on the voice recognition issue......
Hardwarewise, the SGS is superior that htc desire.....I wonder how it would perform if running Symbian^3 OS or Meego.....
I get a great sound quality from the stock music player just by mixing the equalizer and using the music clarity effect...just great...better than any other device I tried.
And the OFFLINE Gps experience is just great as well: the combination SGS - Motonav - External Bluetooth gps device is working like a charm.
I wouldn't change my sgs just yet......
Click to expand...
Click to collapse
Hello,
I know its been a long time since you wrote this thread but I just came by it!
I have the exact same problem with you (I had it since August) even now with the official froyo. I tried factory reset and no new apps (that could cause the problem) but it still disconnects randomly in GSM mode. However, when I have it on auto (gsm and wcdma) I have no issues. I just disconnect data from the power button in froyo. I am wondering if you ever found a solution..
Chryssa

Well, I am subscribed to this topic so I saw your post.
Good and bad news:
First the bad one: No solution yet, it keeps disconnecting IF I stay on "gsm only".
And the good (or a little better) news:
I noticed that on sgs, using "gsm only" or "gsm/wcdma (auto mode) makes no difference on battery consumption....
By the way, this is a Samsung issue, not really an Android one.
On a HTC Desire HD, you can use "gsm only" mode with no problems...

Thank you for your answer!
I noticed that about the battery too. So not too bad, I just have to keep it on auto mode then..

Same issue
Im having the same issue but in a optimus t the worst part is that i cant get service at all.. when i press change network preferred it wont change and when i try to press on turn on radio it wont work either....

[HELP] SGS2 not receiving signals

Hi
This past Saturday, the 3G signal strength in my area was pretty weak due to heavy rains and thunderstorm. So I connected the CRC9 3G antenna to my SGS 2 that I used with my 3G modem. Later on I disconnected the antenna and then I found out the phone was not receiving any signals. On further investigation found out that if I went outside the phone was receivng signals but juts a bar or two at max. Tried the same sim in my friends SGS2 and it was receiving full signals.
After this I tried flashing different roms, kernels, modems etc but to no avail, the situation did not improve. Now the only way I can receive signal in my phone is by connecting a thin copper wire to the hole of the CRC9 connector at the back of the phone.
The phone was purchasded in UK from CPW, hence does not carry local Indian warranty.
So whats the best thing to do? Please help me.

Tried factory reset?

Yep tried hard factory reset.
Tried all possible modems vers, things work a bit better with KF2.

so guys can anyone help me?

Would you be able to put a different networks sim in, to see it it is just the network being faulty, or a hardware problem. Maybe if you have a different phone you you can see how good the signal is in that and compare the two, to see if it is again hardware or networks.
If it is hardware, there is really only a couple of things to do, take it to a phone repair shop, or get in contact with Samsung and pay them to fix it. I know that a couple of weeks ago in the uk, I started getting only 2g connectivity and it kind of scared me a bit, thinking I had damaged my brand new phone. It turned out the networks 3g was down in my area for a couple of days.
If I have helped, please hit the thanks button (please) >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

danielsf said:
Would you be able to put a different networks sim in, to see it it is just the network being faulty, or a hardware problem. Maybe if you have a different phone you you can see how good the signal is in that and compare the two, to see if it is again hardware or networks.
If it is hardware, there is really only a couple of things to do, take it to a phone repair shop, or get in contact with Samsung and pay them to fix it. I know that a couple of weeks ago in the uk, I started getting only 2g connectivity and it kind of scared me a bit, thinking I had damaged my brand new phone. It turned out the networks 3g was down in my area for a couple of days.
Click to expand...
Click to collapse
I had the same problem, I put in a different sim and it worked fine, for some reason it hated the orange network in the uk, but seemed to work well on o2.

[Q] i9505 stuck out of service

Hi,
I have a weird problem with my S4.
At work I have some areas with really bad coverage so sometimes the phone can stay for a few minutes (or even say 1h) out of service.
This is all normal. The coverage sucks, the building is weird, not problem here.
The problem is that when I go outside where the signal is normally full it does not register back to the network.
Even more it does not even go to "emergency only mode". On a few occasions I arrived back home (10Km + drive) until I realized people can't call me because the phone is out of service.
What is even weirder is the fact that on some occasions, even though the (no service) (/) sign is displayed mobile data works just fine.
My previous iPhone did something similar too - it took a while for it to recover signal after exiting the coverage black spots but never more than maximum 5 minutes.
To me it looks like a radio modem issue and maybe this is aggravated by the fact that my carrier uses the same 2100MHz frequency for both Data and Voice.
I would like to know if any of you have experience anything like this or if there is some app available that can monitor what's happening.

what network and firmware you on and wich s4 variant:thumbup:
Sent from my GT-I9505 using xda premium

I9505XXUBMEA I9505OXXBMF1
It's Europe standard i9505.
Network is Digi.Mobil Romania - but I doubt it's relevant since it can't get even emergency only (other networks).

so... any idea?

Android needs to work on it's notification. No Service and the reception bars only gauge voice coverage. You can test this out by using Service Mode to do a PS Only (data) attach instead of the standard PS + CS (voice) attach. It'll say no service, but data will be fine.
Emergency only, is when there is coverage from other operators but not yours. No service, means your way off the grid.
I've noticed the issue you describe and it's only on some firmwares. Try a newer one and see if you still have the same issue. But you might notice a drop in your battery life because your phone will be scanning all the time. If you're happy with no coverage at work, best to just turn it off and then turn it on when your outside.
Best option is to tell your operator about the lack of coverage. There's someone in charge of stats who get's beaten every time you drop a call. You'll get extra attention if you've got other businesses around you, so let them know that too.

Thanks for the reply.
I am already on the latest firmware and I noticed the same behavior on the firmware before this one.
Unfortunately I can't try out other modem versions (from other FW packages) as that would void my warranty.

avoid said:
Thanks for the reply.
I am already on the latest firmware and I noticed the same behavior on the firmware before this one.
Unfortunately I can't try out other modem versions (from other FW packages) as that would void my warranty.
Click to expand...
Click to collapse
but...what about reboot phone? i know isnt funny but until u find a problem u can just reboot ur phone while u are going out from ur office...or just try to enable and disable airplane mode

Of course reboot works but I am looking for a solution, not a partial workaround.
The most annoying problem is that if I forget to reboot it when I leave work it will not recover network connectivity even if I am in areas with very good coverage, areas where you would expect your phone to work.
It looks like when it decides to give up it does not try again. It is very weird that it also drops the signal from other networks (the "emergency only") even if it's well in their coverage areas. I guess I will have to switch phones... Even if this issue was present for the iPhone too it never took more than a few minutes for it to recover on its own. And I'm not an apple fan

Just to do some brain ecercise...do u keep in power save when u are out of signal ? Its possible that disable check after few tries
Sent from my GT-I9505 using xda app-developers app

It's not in power save. I only use that function in case of battery emergency.

Same problem here
Hello, I have the EXACT same problem here. I am in Argentina.
Now, I've been in the USA for a few weeks, visiting, and while my phone was roaming, I didn't have a single problem with my phone.
Since I came back, 3 days ago, I haven't had any problems in Argentina, either.
Is it possible that something got activated when the phone was registered to another company? (it was AT&T i believe)
If that's the case... maybe you can try putting a sim card of another company and see if you still have the problem?
Please let me know if you still have the same problem or if you got it solved. I would love to know something more scientific about all this.
I don't know if this is relevant, but my compass is off by about 30 degrees. Maybe my phone is defective?
THANKS FOR ALL YOUR HELP YOU CAN GIVE ME WITH THIS
---------------------
avoid said:
Hi,
I have a weird problem with my S4.
At work I have some areas with really bad coverage so sometimes the phone can stay for a few minutes (or even say 1h) out of service.
This is all normal. The coverage sucks, the building is weird, not problem here.
The problem is that when I go outside where the signal is normally full it does not register back to the network.
Even more it does not even go to "emergency only mode". On a few occasions I arrived back home (10Km + drive) until I realized people can't call me because the phone is out of service.
What is even weirder is the fact that on some occasions, even though the (no service) (/) sign is displayed mobile data works just fine.
My previous iPhone did something similar too - it took a while for it to recover signal after exiting the coverage black spots but never more than maximum 5 minutes.
To me it looks like a radio modem issue and maybe this is aggravated by the fact that my carrier uses the same 2100MHz frequency for both Data and Voice.
I would like to know if any of you have experience anything like this or if there is some app available that can monitor what's happening.
Click to expand...
Click to collapse

Hi I have similar issue,
My phone says its out of service or no signal or no network also I checked my sim card in other phone in the same place and it is fine. The i9505 model in ireland meteor provider was running ok until deicided to give a try to another network operator, when I changed the sim card it didnt only catch up the signal from new network provider but also it refuses to catch the old network provider. Funny thing is that I am receiving 3G but no signal bars and no service sign is beeing displayed. I am running latest official BTU (UK) firmware, the phone was never rooted, altough I had to remove the simlock and instal unbranded firmware. The phone worked fine with the newest updates for a month and now I am facing this trouble.
No factory resets nor installing same radio (couple of times) have helped. Also I used odin to instal same firmware (as it has locked bootloader) so I cannot revert back to other stock firmwares, but still no joy.
hope that someone faced the same problems and describe how to solve this issue. thanks

Periodic prompt for SIM PIN since 4.3

Deleted

WibblyW said:
Deleted
Click to expand...
Click to collapse
Do you still have the problem? Because, I have the same issue on my Nexus 4 since 4.3. Sometimes it loose GSM carrier, sometimes it ask (again) the PIN code.
Fred

Fredouille66 said:
Do you still have the problem? Because, I have the same issue on my Nexus 4 since 4.3. Sometimes it loose GSM carrier, sometimes it ask (again) the PIN code.
Fred
Click to expand...
Click to collapse
Yes.
I tried reseating/cleaning the SIM and am waiting to see if that helps. Some have seen success by using tape to stop the SIM touching the edge of the SIM carrier. Odd that that should work if the problem is caused by poor GSM coverage...

WibblyW said:
Yes.
I tried reseating/cleaning the SIM and am waiting to see if that helps. Some have seen success by using tape to stop the SIM touching the edge of the SIM carrier. Odd that that should work if the problem is caused by poor GSM coverage...
Click to expand...
Click to collapse
Maybe the problem was there in 4.2.2 but was not visible. I just have put some tape on the GSM coverage to isolate the ship pins, and hope that it will solve it. First good point, the phone still works with the tape inside! It seems also that the GSM signal level is better
Wait & See...
Fred

Fredouille66 said:
Do you still have the problem? Because, I have the same issue on my Nexus 4 since 4.3. Sometimes it loose GSM carrier, sometimes it ask (again) the PIN code.
Fred
Click to expand...
Click to collapse
Fredouille66 said:
Maybe the problem was there in 4.2.2 but was not visible. I just have put some tape on the GSM coverage to isolate the ship pins, and hope that it will solve it. First good point, the phone still works with the tape inside! It seems also that the GSM signal level is better
Wait & See...
Fred
Click to expand...
Click to collapse
Hope you can SIM out again
A SIM is a digital device to which the phone communicates using a protocol. It should either work or not work. If the connection to it bad I would expect it to work intermittently and be sensitive to physical knocks or the phone's physical position. I don't see how it would affect signal strength.

WibblyW said:
Hope you can SIM out again
A SIM is a digital device to which the phone communicates using a protocol. It should either work or not work. If the connection to it bad I would expect it to work intermittently and be sensitive to physical knocks or the phone's physical position. I don't see how it would affect signal strength.
Click to expand...
Click to collapse
Signal strength hasn't changed, only the phone position inside the "Faraday bunker" where I work!
Thank you!
Fred with his Nexus 4 "tape inside"

calling out hardware guys to the rescue

Hello, im going straight to the point, i use my zenfone 5 (t00j) as a gps device all teh time, i ride a motorcycle all the time, unfortunally on a highway the phone flew out of the holder, got ran over a bunch of times by passing cars, but i noticed it was still alive, the volume buttons would make the bip sound when it reachs maximum volume ( screen wouldnt even light up so that was teh only indication). so i went on ebay and bought a bunch of parts. ok now the issue:
I cant get network signal, but i do have GPS and WIFI working flawlessly, what i wanna know is, does the wifi shares the same antenna? by that i mean that RF cable that connects the charging board to motherboard? is that the antenna for the network? it looks good dont show signs of damage but im at a lost, Sim2 was fisically disconected when i pick the phone up, and the SDcard was gone aswell, those were the main impact areas.
Can it be software bug or hardware? i've changed the sim card slots aswell and a factory reset
SMMI test shows only sim card slots fail and modem bus (wich i think its 3g?) wich would make sense not to work since cant get any signal, everything else pass's
Any help, any info on how that works? sim card slots send the info somewhere, where? what reads those signals?
thanks and if u know of somewhere more apropriate, i know this forum is more of a software related thing, but its active and i may get relevant info around here

fearmesuckers said:
Hello, im going straight to the point, i use my zenfone 5 (t00j) as a gps device all teh time, i ride a motorcycle all the time, unfortunally on a highway the phone flew out of the holder, got ran over a bunch of times by passing cars, but i noticed it was still alive, the volume buttons would make the bip sound when it reachs maximum volume ( screen wouldnt even light up so that was teh only indication). so i went on ebay and bought a bunch of parts. ok now the issue:
I cant get network signal, but i do have GPS and WIFI working flawlessly, what i wanna know is, does the wifi shares the same antenna? by that i mean that RF cable that connects the charging board to motherboard? is that the antenna for the network? it looks good dont show signs of damage but im at a lost, Sim2 was fisically disconected when i pick the phone up, and the SDcard was gone aswell, those were the main impact areas.
Can it be software bug or hardware? i've changed the sim card slots aswell and a factory reset
SMMI test shows only sim card slots fail and modem bus (wich i think its 3g?) wich would make sense not to work since cant get any signal, everything else pass's
Any help, any info on how that works? sim card slots send the info somewhere, where? what reads those signals?
thanks and if u know of somewhere more apropriate, i know this forum is more of a software related thing, but its active and i may get relevant info around here
Click to expand...
Click to collapse
Its hardware problem .You must buy a new phone to solve the problem ..

raven001 said:
Its hardware problem .You must buy a new phone to solve the problem ..
Click to expand...
Click to collapse
respectufully, thats a whole bunch of nothing of an answer, ofc if i buy a new phone it will be solved lol, i have a new phone already, but i want to fix this one, hence my questions above, wanna try and solve it, since its only the network having issues, i might just use it as a dedicated gps/multimedia device since i fixed that much already.
the RF cable, thats the network antenna? what chip reads those signals?