Can't get signal - Galaxy S 4 Q&A, Help & Troubleshooting

Hi there,
So, suddenly, my Samsung Galaxy S4 (i9500) stopped getting signal.
It shows my gsm carrier, but do not get any signal.
When I tried to use RegionLock Away, it shows me this error:
"Could not locate csc data you could try flashing a csc package to correct this."
And when I try to make a call, it shows: Mobile network not available.
And solution for this?

fucore said:
Hi there,
So, suddenly, my Samsung Galaxy S4 (i9500) stopped getting signal.
It shows my gsm carrier, but do not get any signal.
When I tried to use RegionLock Away, it shows me this error:
"Could not locate csc data you could try flashing a csc package to correct this."
And when I try to make a call, it shows: Mobile network not available.
And solution for this?
Click to expand...
Click to collapse
Are u using STOCK rom? Install this APP and add some screenshots pls.

Joku1981 said:
Are u using STOCK rom? Install this APP and add some screenshots pls.
Click to expand...
Click to collapse
No. I got Lollipop and than started to get the error.
I'm downloading one stock here, but I don't know if it is the right one. I got this phone from a friend.
After I flash stock, I'm gonna come here and edit this post.
Thank you dude, cuz I'm going crazy.

Where'd you get Lollipop, OTA, or did you flash it? It sounds like you probably flashed an incorrect modem.

Morningstar said:
Where'd you get Lollipop, OTA, or did you flash it? It sounds like you probably flashed an incorrect modem.
Click to expand...
Click to collapse
I flash the one that the author post on the topic.
Well, I flashed the stock and now it doesnt even recognize my carrier and IMEI is null.
There is any way to find out where the phone came from so I could download the stock?
@edit
Just flash one stock rom called: GT-I9500 imei fix.
Show an IMEI that isnt mine, I'm able to see that I have voice mail, but can't get signal.
Anything?

Sorry for the up topic, but anyone?

You shouldn't ever be messing with anything involving IMEI repair unless you are sure that you need it, and you know exactly what you're doing.

If the problem appeared without you doing anything then you got an hardware failure.
Replace the emmc chip if it's an imei problem.

Related

[Q] Flashed stock rom, now no network?

Hi there, new to the forums posting but I read here constantly. I have an sm-900w8 note from Telus in Canada. I was running a custom rom before and decided I wanted to go back to stock before the Kitkat release. Anyway, I flashed the rom from sammobile.com that was for my phone (the link said it was for telus and the file even ends in TLS). So I flash it using odin and everything is perfect, the phone reboots and odin is finished. After that I decided I wanted to clear all my data and apps off the phone as well so I did a factory reset. The next time I turn the phone on everything is working (wifi gps ect) but I can't get on the network and it says I don't have a valid SIM. Also I notice the app packages from telus are not the correct ones and one of them is labelled Bell. So I am guessing the site has the bell firmware for telus as well? This doesn't matter to me but I do need my network running. Do you think it would just be a modem problem? Any information would be GREATLY appreciated guys!
Kevind_444 said:
Hi there, new to the forums posting but I read here constantly. I have an sm-900w8 note from Telus in Canada. I was running a custom rom before and decided I wanted to go back to stock before the Kitkat release. Anyway, I flashed the rom from sammobile.com that was for my phone (the link said it was for telus and the file even ends in TLS). So I flash it using odin and everything is perfect, the phone reboots and odin is finished. After that I decided I wanted to clear all my data and apps off the phone as well so I did a factory reset. The next time I turn the phone on everything is working (wifi gps ect) but I can't get on the network and it says I don't have a valid SIM. Also I notice the app packages from telus are not the correct ones and one of them is labelled Bell. So I am guessing the site has the bell firmware for telus as well? This doesn't matter to me but I do need my network running. Do you think it would just be a modem problem? Any information would be GREATLY appreciated guys!
Click to expand...
Click to collapse
The first and most important question: Do you have a backup of your EFS folder?
If so, you'll be happy. If not, prepare for the worst case scenario.
Kevind_444 said:
Hi there, new to the forums posting but I read here constantly. I have an sm-900w8 note from Telus in Canada. I was running a custom rom before and decided I wanted to go back to stock before the Kitkat release. Anyway, I flashed the rom from sammobile.com that was for my phone (the link said it was for telus and the file even ends in TLS). So I flash it using odin and everything is perfect, the phone reboots and odin is finished. After that I decided I wanted to clear all my data and apps off the phone as well so I did a factory reset. The next time I turn the phone on everything is working (wifi gps ect) but I can't get on the network and it says I don't have a valid SIM. Also I notice the app packages from telus are not the correct ones and one of them is labelled Bell. So I am guessing the site has the bell firmware for telus as well? This doesn't matter to me but I do need my network running. Do you think it would just be a modem problem? Any information would be GREATLY appreciated guys!
Click to expand...
Click to collapse
Seems you have installed a carrier FW on your device and it has SIM LOCKED it. try flashing another.
EDIT: @donalgodon - it's only really EFS when it boot loops and shows Android process not responding etc :good:
radicalisto said:
Seems you have installed a carrier FW on your device and it has SIM LOCKED it. try flashing another.
EDIT: @donalgodon - it's only really EFS when it boot loops and shows Android process not responding etc :good:
Click to expand...
Click to collapse
Well, that's not exactly accurate. The phone can boot with a corrupted EFS, but you will get no network access (and no IMEI number.)
It's happened to me, so I know it's possible. It's a common symptom of the OP's issues on Samsung devices.
radicalisto said:
Seems you have installed a carrier FW on your device and it has SIM LOCKED it. try flashing another.
EDIT: @donalgodon - it's only really EFS when it boot loops and shows Android process not responding etc :good:
Click to expand...
Click to collapse
Yeah I am sure I'm not in dire straights yet and lucily I have my backup phone to use for now. I am wondering though, sammobile is the most legit source for stock firmware around, do you guys have any suggestions? Or can I possibly even try just flashing a new modem through odin? (I have never done this but seems easy enough)
donalgodon said:
Well, that's not exactly accurate. The phone can boot with a corrupted EFS, but you will get no network access (and no IMEI number.)
It's happened to me, so I know it's possible. It's a common symptom of the OP's issues on Samsung devices.
Click to expand...
Click to collapse
True, however, OP states that it was Telus FW that was downloaded and flashed...but it's showing BELL.settings, So the probability of it being EFS is low, it's sim locked the device via the BELL firmware more than likely. Reflashing the correct or unbranded firmware will indeed fix it
---------- Post added at 07:28 PM ---------- Previous post was at 07:26 PM ----------
Kevind_444 said:
Yeah I am sure I'm not in dire straights yet and lucily I have my backup phone to use for now. I am wondering though, sammobile is the most legit source for stock firmware around, do you guys have any suggestions? Or can I possibly even try just flashing a new modem through odin? (I have never done this but seems easy enough)
Click to expand...
Click to collapse
Well Sammobile isn't immune to mistakes, but it's rare it happens, they're genuine enough.. You could try the modem, first thing I'd do is test the back up and see if it's the downloaded ROM that has cause the issue.
And yes, you can flash the modem via Odin.
Hey guys... update :
Used #*272 and changed csc from bell to Telus. Fixed instantly!
Thanks for your help guys.
Sent from my SM-N900W8 using xda app-developers app
Kevind_444 said:
Hey guys... update :
Used #*272 and changed csc from bell to Telus. Fixed instantly!
Thanks for your help guys.
Sent from my SM-N900W8 using xda app-developers app
Click to expand...
Click to collapse
I thought this doesn't work in changing csc code. What's the full numbers you have to input, is it #*272*IMEI# ?

[Q] Samsung Galaxy S4 L720 shows Unknown Baseband, IMEI, Software Version and MEID

Hello,
I have a sprint Samsung galaxy s4 L720, unrooted on stock 4.3 baseband version L720VPUAMDC, the problem is that now it shows baseband, software version and IMEI as unknown and also it has an X up in the coverage bars so im unable to make or receive calls. I've never tried to root it or to change it's software. also on few occasions the info about IMEI and baseband comes back and I can make calls again but it just goes back to unknown after a while. also I've tried to reinstall the software and made several factory resets. I just don't know what can I do anymore.
help will be appreciated
thanks.
mariodelacruz1214 said:
Hello,
I have a sprint Samsung galaxy s4 L720, unrooted on stock 4.3 baseband version L720VPUAMDC, the problem is that now it shows baseband, software version and IMEI as unknown and also it has an X up in the coverage bars so im unable to make or receive calls. I've never tried to root it or to change it's software. also on few occasions the info about IMEI and baseband comes back and I can make calls again but it just goes back to unknown after a while. also I've tried to reinstall the software and made several factory resets. I just don't know what can I do anymore.
help will be appreciated
thanks.
Click to expand...
Click to collapse
Really an unrooted MDC firmware?!
You haven't been getting update notices for months and months?
How long have you had the phone?
Was/is it flashed to another carrier?
How did you 're-install' the software? PC Odin? What version of Odin?
mariodelacruz1214 said:
Hello,
I have a sprint Samsung galaxy s4 L720, unrooted on stock 4.3 baseband version L720VPUAMDC, the problem is that now it shows baseband, software version and IMEI as unknown and also it has an X up in the coverage bars so im unable to make or receive calls. I've never tried to root it or to change it's software. also on few occasions the info about IMEI and baseband comes back and I can make calls again but it just goes back to unknown after a while. also I've tried to reinstall the software and made several factory resets. I just don't know what can I do anymore.
help will be appreciated
thanks.
Click to expand...
Click to collapse
I had the same problem. To fix it I just reflash the original rom that it has with Odin. Ex.: Mine is NAE 4.4.2, so I flashed that with Odin PC.
Remember: IF ANYTHING GOES WRONG I'M NOT RESPONSABLE
leaderbuilder said:
Really an unrooted MDC firmware?!
You haven't been getting update notices for months and months?
How long have you had the phone?
Was/is it flashed to another carrier?
How did you 're-install' the software? PC Odin? What version of Odin?
Click to expand...
Click to collapse
*The only update I got was the 4.3 one.
*I have like 4 months with the phone.
*Yeah it is flashed to another carrier, I'm in a foreign country. it worked smoothly the first 2 months and a half.
*it wasn't me who re-installed the software. I had some cellphone repair shop do it.
hope this helps.
Take it back to them to fix it.
w7excursion said:
Take it back to them to fix it.
Click to expand...
Click to collapse
^DO THAT^ It is their responsibility. Well technically your responsibility, but have them do what ever you need them to do.
leaderbuilder said:
^DO THAT^ It is their responsibility. Well technically your responsibility, but have them do what ever you need them to do.
Click to expand...
Click to collapse
The problem is that it had the issue before they reinstalled the software they just couldn't fix it and they didn't even charge me, so I don't believe it's their fault. also I noticed that I have baseband version L720PUAMDC and Build number JSS.15.L720VPUEMK2. shouldn't these 2 be the same?
mariodelacruz1214 said:
The problem is that it had the issue before they reinstalled the software they just couldn't fix it and they didn't even charge me, so I don't believe it's their fault. also I noticed that I have baseband version L720PUAMDC and Build number JSS.15.L720VPUEMK2. shouldn't these 2 be the same?
Click to expand...
Click to collapse
No they don't have to.
What they probably did is keep the baseband at MDC because that (or MDL) is needed for doing SIM/Carrier unlock and flashing. And they updated the ROM to a MK2 build.
Obviously they screwed the pooch somewhere.
Your best bet is reading through the few SIM unlock posts here in the forum (there are already a few and have dozens if not hundres of posts!). And using google to maybe look into your specific country/region/carrier flashing options.
Uh oh...
mariodelacruz1214 said:
The problem is that it had the issue before they reinstalled the software they just couldn't fix it and they didn't even charge me, so I don't believe it's their fault. also I noticed that I have baseband version L720PUAMDC and Build number JSS.15.L720VPUEMK2. shouldn't these 2 be the same?
Click to expand...
Click to collapse
If you update everything via MK2 you'll get everything back...except I'm pretty sure you'll lose the unlock, unless you know how to bring your baseband back to MDC...pretty straight forward, just Odin the modem.
So basically:
1) Odin MK2 full
2) Odin MDC modem
You should have your baseband back and thus everything restored.
This will not affect your 0011 menu edits.
In worst case scenario I will do this pro bono...you just take care of the shipping fees, but you should honestly try, at the very least, the above 2 steps.
before you do anything extreme, go to mobile network settings and set your cdma subscription to nv.
hi
you can repair via z3x box with samsung 16.7
its working very good i already repair alot of samsung l720
(1) flash the phone with original firmware
(2) root your phone with cft auto root file
(3) repair your imei with z3x 16.7
thanks

Problem Since Rooting - Unable to Dial Out or Receive Calls

Ive been unable to dial out or receive calls on my note 3 since rooting it. I have tried everything I can think of to get it resolved but have been unable to do it. This is not a problem with my mobile phone provider as I have tried my friends sims and they dont work either. I have installed the stock rom and reset factory defaults but I am still unable to use it.
I will pay someone to fix this for me now as it has now gotten out of hand! I have sent it to samsung and they say the device has been rooted and will not touch it! Any help would be much appreciated!!
Many thanks
Andy
P.s. If you can fix it, I will pay!!
Did you lose your IMEI after rooting? Or can you still register on your network? Also did you trip knox by rooting your phone?
Please help. My network doesn't work on custom rom but works on official firmware.
Sent from my SM-N9005 using XDA Free mobile app
Thanks for your reply Steven1962. The IMEI Number is still intact though I am not able to register on the network. I did trip knox when I rooted my device, I just sent it to samsung for repair and they wouldn't touch it as the knox was tripped.
AndyBrine said:
Thanks for your reply Steven1962. The IMEI Number is still intact though I am not able to register on the network. I did trip knox when I rooted my device, I just sent it to samsung for repair and they wouldn't touch it as the knox was tripped.
Click to expand...
Click to collapse
So if I understand correctly you are prompted to enter your PIN after reboot but you still can't register on your network even though the PIN gets accepted?
Steven1962 said:
So if I understand correctly you are prompted to enter your PIN after reboot but you still can't register on your network even though the PIN gets accepted?
Click to expand...
Click to collapse
I am not actually asked for a PIN. I do believe it registers to the network as it says im conected to Virgin, I just cant dial out or receive calls.
AndyBrine said:
I am not actually asked for a PIN. I do believe it registers to the network as it says im conected to Virgin, I just cant dial out or receive calls.
Click to expand...
Click to collapse
I think if it doesn't ask for a PIN it can not really register to the network. What firmware are you on currently? What's the version of your modem?
Flash last stock from your country with Odin ....
AndyBrine said:
I am not actually asked for a PIN. I do believe it registers to the network as it says im conected to Virgin, I just cant dial out or receive calls.
Click to expand...
Click to collapse
Yes, check your baseband version.
And flash the stock firmware for your device may help.
vndnguyen said:
Yes, check your baseband version.
And flash the stock firmware for your device may help.
Click to expand...
Click to collapse
Apologies for the late reply, I have been waiting for my phone to come back from Samsung. How do I know which baseband version I need for my phone?
AndyBrine said:
Apologies for the late reply, I have been waiting for my phone to come back from Samsung. How do I know which baseband version I need for my phone?
Click to expand...
Click to collapse
Install Phone INFO ★Samsung★ app to get info about your device (CSC, baseband, etc...)
Then open Menu > 'Firmware Browser' to download the stock firmware for your device.
You can flash full firmware, or extract the baseband (modem.bin + NON-HLOS.bin) and flash them separately.
Hi everyone,
vndnguyen, I'll address this question to you but hopefully help the original poster too.
I ran firmware browser in the above app but neither the vodafone nor btu (does btu mean unbranded?) version match my device. My bootloader, baseband and pda all end NC2 and my csc NA4. Even on Sammobile I cannot find that.
So my question is does it matter which one I install? If I install any vodafone uk offering will I be ok? If I install any uk btu version will it just be stock minus the bloat?
I've tried a few custom roms but always seem to head back to stock so wanted to flash pure stock if that makes any sense.
Sent from my SM-N9005 using Tapatalk

[Q] Galaxy S4 (SGH-I337M) says NO MOBILE NETWORK (HELP!)

Hey guys,
I'm new to the forum so please excuse me if this is the wrong place to post this. I'll start from the beginning. I bought a Galaxy S4 (SGH-I337m) from somebody in my city. They said the phone originally worked with Rogers/Fido, but that they switched the logic board on it so now it works with Bell/Virgin. The thing is though, when I put my Virgin Mobile sim card in the phone, it won't let me send texts or make calls. I checked the IMEI and it's not blacklisted or anything.
It says No Service and has the little circle with a diagonal line showing up in the notification bar and when I try to send a text, it says No Network Connection (No signal found for mobile networks). I find it weird because I still get a notification saying that I have an unheard voicemail.
I've tried resetting the phone multiple times. I've also tried flashing both the Bell and Virgin Mobile Lollipop firmwares and that didn't work either. To be honest, I'm not sure how to tell which one I would need to install. I noticed when trying to flash the Bell firmware, that the phone kinda skips to a black screen quickly every time I close an app. I'm assuming that would mean it needs the Virgin Mobile firmware.
That still doesn't fix the mobile network issue though. If anyone could help me out, I would GREATLY appreciate it!!!! Here is a bit of info, I'm hoping it helps. If you need anything else, please let me know.
Model number: SGH-I337M
Android Version: 5.0.1
Baseband Version: I337MVLUGOC4
Build Number: LRX22C.I337MVLUGOC4
Also, in the "Status" menu, I noticed it says:
Service State
Voice: Out of Service / Data: Out of Service
Not sure if that has anything to do with it or if that's normal. Again, if you have any suggestions, PLEASE let me know. I'm super desperate as I can't afford to lose the money I paid for this. Thanks in advance.
EDIT: Coincidentally my girlfriend has a Galaxy S4 of the same model and with Bell/Virgin. I opened up the ABOUT DEVICE menu in both phones and the only other difference I noticed is on hers it says:
SE for Android Status:
"sepf_sgh-I337M_5.0.1_0013"
And mine says "sepf_sgh-I337M_5.0.1_0009"
Does that have anything to do with it maybe?
TeknikalMusic said:
Does that have anything to do with it maybe?
Click to expand...
Click to collapse
Install this APP and add all screenshots pls .
Okay, will do. I will post the screenshots in about 20 mins. I rooted the phone, installed CWM and am in the middle of flashing the latest firmware again. I forgot to enable USB debugging before flashing originally and I wanted to install CWM to wipe the cache. No idea if that would make a difference but I've been up all night trying anything lol. Thank you for the reply though, will post the screenshots in about 20 mins.
TeknikalMusic said:
Okay, will do. I will post the screenshots in about 20 mins. I rooted the phone, installed CWM and am in the middle of flashing the latest firmware again. I forgot to enable USB debugging before flashing originally and I wanted to install CWM to wipe the cache. No idea if that would make a difference but I've been up all night trying anything lol. Thank you for the reply though, will post the screenshots in about 20 mins.
Click to expand...
Click to collapse
Don't flash more things atm for avoid one brick pls :highfive:
Joku1981 said:
Don't flash more things atm for avoid one brick pls :highfive:
Click to expand...
Click to collapse
Okay, I have the app installed. Which screens should I screenshot? I know you shouldn't post your IMEI online, so I'm assuming I skip the "personal" tab or?
Here is 4 of the screenshots I took (I hope this works lol)
Here are the other 2 I took
TeknikalMusic said:
Here are the other 2 I took
Click to expand...
Click to collapse
All seems correct but I think your device works for Bell Mobile (BMC) only but NOT for Virgin Mobile (VMC). Try to use one BELL simcard for verify it.
Joku1981 said:
All seems correct but I think your device works for Bell Mobile (BMC) only but NOT for Virgin Mobile (VMC). Try to use one BELL simcard for verify it.
Click to expand...
Click to collapse
In all my experience, Bell/Virgin are always interchangeable. Same with Telus/Koodo and Rogers/Fido. I tried putting a Bell sim card in though just now and it still has the problem. It doesnt load any of the signal bars or anything. Oddly enough, when there is no sim card in the phone, the bars show up?
TeknikalMusic said:
In all my experience, Bell/Virgin are always interchangeable. Same with Telus/Koodo and Rogers/Fido. I tried putting a Bell sim card in though just now and it still has the problem. It doesnt load any of the signal bars or anything. Oddly enough, when there is no sim card in the phone, the bars show up?
Click to expand...
Click to collapse
Don't doubt it and return it if you can still.
Joku1981 said:
Don't doubt it and return it if you can still.
Click to expand...
Click to collapse
Since it was from Bell, would flashing the Virgin Mobile firmware somehow mess it up? What are the exact steps I would need to take to try to reset it back to stock settings? I'm wondering if I'm missing anything. Or if the APN settings have anything to do with it? I set them to default already and tried adding the Virgin Mobile Canada apn settings as well
http://forum.xda-developers.com/galaxy-s4-att is the proper place to ask your questions regarding your S4, rather than where you originally posted this, the International S4 forum. Since more people with your device will be available at the given link, you may want to ask your questions over there. Or simply be patient, as this thread will be moved over there in due time.

S8+ LDU

Hello guys,
im working for a german operator and we got the s8 and the s8+ ldu's
im wondering cause the normal s8 have no imei number on the backside of the device.
the s8+ got a IMEI number so it seems to have a gsm module inside.
i just flashed a stock s8+ rom but its not recognizing my simcard.
do i need to flash a new modem also?
any tips?
on the back it says LIVE DEMO NOT FOR SALE, but there's a IMEI number directly over it.
regards
BurningRain said:
Hello guys,
im working for a german operator and we got the s8 and the s8+ ldu's
im wondering cause the normal s8 have no imei number on the backside of the device.
the s8+ got a IMEI number so it seems to have a gsm module inside.
i just flashed a stock s8+ rom but its not recognizing my simcard.
do i need to flash a new modem also?
any tips?
on the back it says LIVE DEMO NOT FOR SALE, but there's a IMEI number directly over it.
regards
Click to expand...
Click to collapse
Are you trying to sell it or use it with a sim?
Sent from my SM-G950F using Tapatalk
Galaxy K Zoom said:
Are you trying to sell it or use it with a sim?
Sent from my SM-G950F using Tapatalk
Click to expand...
Click to collapse
im just trying to use it for myself since im not allow to sell it lmao.. its a device from our mobile shop here.. i just wanna use it for myself since we got 2 ldu's .. 1 is already installed as ldu and one is just hanging around here.. would be a waste if im not able to use it somehow.. as i said there's imei on the backside.. dunno how to fix that.. already flashed stock rom but it does not recognize the sim i plugin
BurningRain said:
im just trying to use it for myself since im not allow to sell it lmao.. its a device from our mobile shop here.. i just wanna use it for myself since we got 2 ldu's .. 1 is already installed as ldu and one is just hanging around here.. would be a waste if im not able to use it somehow.. as i said there's imei on the backside.. dunno how to fix that.. already flashed stock rom but it does not recognize the sim i plugin
Click to expand...
Click to collapse
Hi there. I have an LDU of the regular S8. But mine cant even get into demo mode. It's recovery or Download mode only. What stock firmware did you flash to make it at least work?
My model # on the back is SM-G950XU
I've flashed like 6 different stock FW, it passes in odin and then as its loading up it stops, then says "erasing" and goes back to saying "Security error: an unauthorized firmware has been flashed and the device is locked"
same Issue 950XU
Hi nashville did u fix ur phone because i am facing the same issue with 950XU
cadorette said:
Hi there. I have an LDU of the regular S8. But mine cant even get into demo mode. It's recovery or Download mode only. What stock firmware did you flash to make it at least work?
My model # on the back is SM-G950XU
I've flashed like 6 different stock FW, it passes in odin and then as its loading up it stops, then says "erasing" and goes back to saying "Security error: an unauthorized firmware has been flashed and the device is locked"
Click to expand...
Click to collapse
rajakhan85 said:
Hi nashville did u fix ur phone because i am facing the same issue with 950XU
Click to expand...
Click to collapse
Hey there. Sorry for the delay. Yeah sorry I NEVER found any kind of workaround. I ended up selling the unit for $70 to someone who wanted it for parts. Nothing I tried worked!
S8 950XU
have a bricked 950XU, anyone have firmware to solve without paying some site?
cyanarnofsky said:
have a bricked 950XU, anyone have firmware to solve without paying some site?
Click to expand...
Click to collapse
cadorette said:
Hey there. Sorry for the delay. Yeah sorry I NEVER found any kind of workaround. I ended up selling the unit for $70 to someone who wanted it for parts. Nothing I tried worked!
Click to expand...
Click to collapse
If you guys still have the phone. Do not flash a newer ROM! You will never be able to go back to bootloader rev 1.
Find the XU firmware online and flash that.

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