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[Q] No gsm signal sgs2.

I have been using the fone for 3 weeks and now it lost gsm signal. Gps, wifi working fine. It is simlock free, firmware upgraded to latest, few factory resets still no luck. The signal icon shows normal signal but when you trying to ring it tell " mobile network not available" Many sim cards checked - nothing Is there any trick?
thank you

qwojtus said:
I have been using the fone for 3 weeks and now it lost gsm signal. Gps, wifi working fine. It is simlock free, firmware upgraded to latest, few factory resets still no luck. The signal icon shows normal signal but when you trying to ring it tell " mobile network not available" Many sim cards checked - nothing Is there any trick?
thank you
Click to expand...
Click to collapse
what was the last thing u did to the phone before it started to lose signal

I did nothing am basic usher. No dropped, no experiments. Two days ego wake up and i cant ring.

Firmware upgrade official via Kies .??? Or Samsung stock firmware via Odin .
Correct CSC in phone for your country likewise correct modem.
jje

It happened before upgrade, after upgrade no changes i did it via kies samsung stock firmware. I bought it in England i live in England. What that is CSC ?

Check with your network to see if the IMEI has been blocked. I've had this happen - it was an error on the networks part.
EDIT: ...I say network, but it was the the third party that provides the block list that really made the mistake (it was blocked on all networks for 2 weeks!)

qwojtus said:
It happened before upgrade, after upgrade no changes i did it via kies samsung stock firmware. I bought it in England i live in England. What that is CSC ?
Click to expand...
Click to collapse
CSC = country specific codes . dial *#1234#
I would return to seller .
jje

[Q] Note 3 N900W8 Not letting me choose network

I've been trying to fix since installing the new update at 2pm (PST) today. Finally decided to post a question here hoping someone more knowledgeable can help me fix it.
I bought the phone and it was locked to Bell so I bought a code and was using it on Fido. I flashed the Telcel 4.4.2 update and after I flashed all the files it worked (I tried not flashing modem). When it started I got a screen that said "Network Lock" with only a dismiss button (i.e. nowhere to put re-input my unlock code). If I click it 3 times it lets me into device. In the status bar it says "Invalid SIM card" "Network locked SIM card inserted". When I try to make a call I get "Not registered on network"
I've also tried flashing my old modem.bin via ODIN but that just cause the phone to boot and vibrate a bunch. I was able to get into settings but no option for Network Operator or APN.
The network doesn't work but WiFi and everything else does. So I rooted using the new N9005 root. Added APN settings, and of course, looked for network operators. Fido doesn't show up but all other carriers do (except Chatr).

I'm in the same situation as you are but which new N9005 root are you talking about? I'm on Rogers so if I can use that to get my signal back, that would be awesome.

zerojay said:
I'm in the same situation as you are but which new N9005 root are you talking about? I'm on Rogers so if I can use that to get my signal back, that would be awesome.
Click to expand...
Click to collapse
Here>> https://plus.google.com/+Chainfire/posts/QbVy3arpymx
Please post back if you find anything. I've been looking all day and I've given up for the night.
Don't forget to say thanks

JamesKroll said:
Here>> https://plus.google.com/+Chainfire/posts/QbVy3arpymx
Please post back if you find anything. I've been looking all day and I've given up for the night.
Don't forget to say thanks
Click to expand...
Click to collapse
I got the autoroot installed and working fine. It says invalid SIM.
Previously, I had installed the firmware without flashing the CSC and I don't remember having sim lock issues then (as the Telcel specific files are not flashed) however you have to deal with the Samsung keyboard repeatedly crashing, so you have to find a way around it.
So my suggestion is reflash without the CSC file and brainstorm a way to put another keyboard on it without needing to input anything first (so Google Play is a no-go), probably side load a keyboard apk through ADB or something. Going to give it a shot.
---
The keyboard idea worked fine. Unfortunately I did still get the region/sim lock stuff because everywhere outside of Canada seems to have it turned on and the ROM defaults to tmobile without the CSC apparently. I've decided to bite the bullet and just pay for an unlock as I was planning to do so anyways.
---
And that worked until I rebooted and it asked for a SIM unlock code... well... damn. I'm just going to try to flash a rom with region/sim locking removed. Ugh.
Looks like we can fix this by downgrading or creating our own Rogers files: http://forum.xda-developers.com/showthread.php?t=2608178&page=54

I have the CSC and modem.bin. Tested and working (remember, I flashed PIT as said here http://forum.xda-developers.com/showpost.php?p=49512809)
https://www.mediafire.com/?yjdgd4j8s72bo46

I rolled my own too. Working fine.
Sent from my SM-N900W8 using Tapatalk

hi i just found this thread, i have a rogers note 3, unlocked to virgin, i just flashed the mexican rom. it was working the first time but i messed something up so i had to reflash it, and on this second flash it now says region locked sim. and heres the bad news. the original unlock code IS NOT WORKING ANYMORE. wtf do i do now?

evil-doer said:
hi i just found this thread, i have a rogers note 3, unlocked to virgin, i just flashed the mexican rom. it was working the first time but i messed something up so i had to reflash it, and on this second flash it now says region locked sim. and heres the bad news. the original unlock code IS NOT WORKING ANYMORE. wtf do i do now?
Click to expand...
Click to collapse
Same thing was happening to me. Just follow the instructions in my previous post.

[Q] G900F Network registration problem after flashing

Hi I have international version of S5 G900F. I flashed the phone with UK BTU stock rom. Now the problem is I cannot connect to the Network.
I tried going to Settings->More Networks -> Network Operators -> Select automatically . It took 5-10 mins to search but cannot connect.
Sim is not locked as it was working before I flashed the stock rom. also I read somewhere in internet that once the phone is region unlocked, it is permanently unlocked to use any other country sim. I don't know the original region of my phone but I bought it in Uk from 3rd party dealer not from any carrier.
I can think of two thing at the moment. It should be either regional locked again, but it does not prompt any thing to activate or enter pin or anything like that. or it should be wrong modem.
Is there a way to find if the phone is region locked ?
and is there a way to find correct region of the phone ?
the label on the box was removed so I cannot find from the box as well.
Thanks in advance.

I still haven't fixed this problem. Could someone suggest how to fix?

I've attached some screenshots with my phone info.
first image shows NETWORK:UNBLOCKED and IMEI Certi: PASS
-> I think this means, the phone is not blocked by network, and IMEI certificate has passed so it's not stolen or lost claimed phone.
another screenshot is the Firmware and CSC code/country information,
-> this means, this phone is build to sell in UK, so UK sim should unlock the regional lock.
Also the phone was working fine before I installed stock rom which I dowloaded from sammobile.
in the sceenshot, one of the network is connected but it says emergency call only because it cannot register to the network.
It is not sim lock also, because when I put T-mobile sim it does not ask for pin to unlock also.
what is wrong here. any idea guys? xda supposed to be the biggest android forum and samsung s5 is one of the most popular phone at the moment, isn't there anyone who have similar problem and solved? or atleast give some reason this cannot be fixed at all.

does the TMobile sim work? does it register with the network? If yes, then call the provider (of the other sim) and ask what's going on. Maybe you have a broken sim?

blesio said:
does the TMobile sim work? does it register with the network? If yes, then call the provider (of the other sim) and ask what's going on. Maybe you have a broken sim?
Click to expand...
Click to collapse
I've tried with Orange sim, and it still cannot register to the network. When I put the orange sim, it pop up a dialogbox asking to choose a network provider, there was two options, T-mobile and orange. So it is detecting the sim, but it cannot register.
And also, I tried my sim in another phone, and my sim works in another phone without any problem.

Did you try to flash the firmware again, and then after that restore factory defaults?

blesio said:
Did you try to flash the firmware again, and then after that restore factory defaults?
Click to expand...
Click to collapse
Yes I did, still it didn't work. I emailed samsung customer service with the problem, and they asked me to restore factory defaults.
I did that again but didn't work.
I tried one custom ROM as well. same problem in that rom.

You're rooted? If yes then there might be problem with the modem part of the ROM, can you install the official one part ROM and try with that?

blesio said:
You're rooted? If yes then there might be problem with the modem part of the ROM, can you install the official one part ROM and try with that?
Click to expand...
Click to collapse
I've installed stock rom several times, and several different versions( from here: http://www.sammobile.com/firmwares/1/?model=SM-G900F&pcode=0 ). Rooted several times, installed modem.bin files several times from many custom rom/ stock rom. None of them worked. I tried installing modem.bin when not rooted as well. And all the attempt failed.
I did everything I could possibly think of , Then I posted the question in the forum.

You have the IMEI ??!? Or it is lost?? Then only per efs-backup…
Or sim is broken…
Gesendet von meinem SM-G900F

lwiss said:
You have the IMEI ??!? Or it is lost?? Then only per efs-backup…
Or sim is broken…
Gesendet von meinem SM-G900F
Click to expand...
Click to collapse
I have imei , and sim is working fine, as I tested my sim in another phone.

uktel3315 said:
I have imei , and sim is working fine, as I tested my sim in another phone.
Click to expand...
Click to collapse
I'm having the same problem, but with G900H. I have stock firmware, rooted and everything's working fine until suddenly, I have no network. I restart the phone and get network again but only for a couple of minutes.
Sent from my SM-G900H using XDA Free mobile app

Any update?

XanoZuke said:
Any update?
Click to expand...
Click to collapse
Sry XanoZuke, I could not do anything to fix this, so I returned the phone and got another handset. I now have Exynos Octa-core version. Found snapdragon version is more power efficient. My phone gets heated very quickly.

uktel3315 said:
Sry XanoZuke, I could not do anything to fix this, so I returned the phone and got another handset. I now have Exynos Octa-core version. Found snapdragon version is more power efficient. My phone gets heated very quickly.
Click to expand...
Click to collapse
Don't worry, I found out that the motherboard was water damaged (the irony of life....), so a bought an LG G3.
Regarding the Exynos chip, I'm never buying anything exynos ever again. The performance is not as solid as Snapdragon and it gets heated really fast. Still, thanks for your reply! ?
Sent from my LG-D855 using XDA Free mobile app

uktel3315
Click to expand...
Click to collapse
So sad case remain unsolved, Got almost the same issue, Flashed 1st and last official firmware and custom rom without success NO NETWORK SIGNAL. No IMEI - Null regitered 15 zeros no efs backup etc.
Model : SM-G900S
ROM: XtrStoLite

edreab86 said:
So sad case remain unsolved, Got almost the same issue, Flashed 1st and last official firmware and custom rom without success NO NETWORK SIGNAL. No IMEI - Null regitered 15 zeros no efs backup etc.
Model : SM-G900S
ROM: XtrStoLite
Click to expand...
Click to collapse
have you found a solution yet? i have the exact same problem and have tried the same solutions as you listed...

have you found a solution yet? i have the exact same problem and have tried the same solutions as you listed...
Sorry i end up selling the phone as is..

Same deal
My g900f has no mobile services sims fine

I have the same problem.
Cannot connect to network after flashing new ROM. Since then I tried about 10 different original roms and couple custom roms. Number of different MODEMs and BOOTLOADERs but with no joy. SIM card works fine in different phone.
Also I tried to load different CERT files and QCN with Z3X Box but that didn't help either.
I've tried *#0011# command here are results:
with LTE/WCDMA/GSM auto-connect:
imgur.com/i69HCBM
with WCDMA only:
imgur.com/QPbvKHG
and GSM only:
imgur.com/8InhQWQ
It seems that GSM is not working at all.
At this stage I run out of ideas and probably gonna get rid of the phone as it is or use it as pimped-out ipod touch
(sorry for messed up links but I can't post to outside sites yet)

How to check if S4 i9505 has hardware failure or software problem

I have a s4 i9505 that has a problem of weak signals or no service and gives not registered to network when trying to call. But sometimes its shows full signal bars especially when i am on the roof top and at that time i can even make calls.
The problem is with the phone not the sim because when using the same sim with other phones i don't have an network connection problems at same point where S4 shows no service.
So what do you guys think is it a Hardware failure or software problem.

terminator1983 said:
I have a s4 i9505 that has a problem of weak signals or no service and gives not registered to network when trying to call. But sometimes its shows full signal bars especially when i am on the roof top and at that time i can even make calls.
The problem is with the phone not the sim because when using the same sim with other phones i don't have an network connection problems at same point where S4 shows no service.
So what do you guys think is it a Hardware failure or software problem.
Click to expand...
Click to collapse
Hi mate ,
A little more info , what rom you have , what modem , network settings.....

MAX 404 said:
Hi mate ,
A little more info , what rom you have , what modem , network settings.....
Click to expand...
Click to collapse
Hi ,Its on 4.4.2 official rom with same version of modem
Sent from my GT-I9505 using XDA Free mobile app

terminator1983 said:
Hi ,Its on 4.4.2 official rom with same version of modem
Sent from my GT-I9505 using XDA Free mobile app
Click to expand...
Click to collapse
Hi mate ,
Most of the times this is modem related if you were in a custom rom i would recommend to flash a new rom or even a different kernel , in you case i would reflash stock rom again to make sure is not software related

No it's not on a custom rom. Its on stock 4.4 Hong Kong version.
Sent from my GT-I9505

Help please... Note 3 n9005 BTU doesn't detect my network operator after flashing

Hi guys,
At the beginning thank you for taking a look and spending your time reading it - I'm just trying to be precise.
Just to clarify - I've spent 11 hours yesterday and 10 hours (and counting) today reading and browsing XDA and different forums, searching/figuring out/trying to find solution,
but I think I gave up on my own and will need your help.
Few days ago I bought myself another same Note 3 SM-N9005 (primarily locked to EE, but unlocked with provider), as my old one (which was factory unlocked).
I had issues with signal (after slight water damage a year ago) - not major, but annoying enough to make me get another one.
So I switched to new Note 3 and decided to check new custom ROMs on my old one.
First I installed stock 5.0 - all worked fine, battery life improved etc.
Then tried Fougat rom and AryaMod - and here the problems began. While using one of those ROMs I inserted Polish SIM card.
Message appeared that I'm on roaming, to switch it on/off etc (don't remember what message exactly appeared as I didn't really pay much attention to it at that time)
I recently ordered new pay monthly Virgin SIM card for my partner. When it arrived I've put it in my old Note 3 and "Emergency calls only" message appeared.
I thought SIM wasn't active yet, so contacted Virgin just to be informed that the card is active on their end (I've put it in my new Note 3 and it was actually working).
A bit confused I put my O2 card into old Note 3 and it connected to the network without any problems.
So I started searching for a solution.
I found out that when I searched other networks on my (modified, old) Note 3 it only found O2 - UK, vodafone UK and 3UK.
I checked the same on my new Note 3 and it found O2, vodafone, EE (whose towers Virgin uses) and 3 UK - so all of them.
I thought that maybe EFS, modem, kernel or bootloader have been corrupted/conflicting, so made TWRP backup of my new Note 3 and old Note 3 (for old just to create serial number folder).
Then I replaced old Note 3 backup with new one, so TWRP could find it and restore the whole image from new Note 3, where everything works (Lollipop EE network version).
That didn't do the trick. Restored AryaMod backup - nothing. Old device still comes with "Emergency calls only" when Virgin SIM card is inserted, but it works with O2 card.
I tried different modems, bootloaders.
I checked the IMEI and it's intact.
At the moment I'm back to Stock Lollipop 5.0 [N9005XXSGBPL6_N9005BTUGBOJ1_BTU] and the problem still persists.
When I flashed the stock ROM and inserted Virgin SIM standard pop-up window appeared with network selection where I've chosen obviously Virgin.
When searching now for available networks it comes up again with only O2, Vodafone and 3 - no EE/Virgin.
For some reason it doesn't find/connect to EE towers.
Baseband: N9005XXUGBOJ1
Kernel: 3.4.0-4540543
Build Number: LRX21V.N9005XXSGBPL6
Network: Unknown
Mobile Network Type: Unknown
Service State: Voice: Out of service/Data: Out of service
Mobile network state: Disconnected
Thanks for reading and apologies for long post.
If I missed anything please let me know.
Hope you guys will be able to help and direct me what to do to get it working again

Very difficult to follow your rambling post .
Step one is IMEI the right one .
Two correct baseband and CSC for your network ??

JJEgan said:
Very difficult to follow your rambling post .
Step one is IMEI the right one .
Two correct baseband and CSC for your network ??
Click to expand...
Click to collapse
Sorry, I know it's long and quite rambling. I'll start new thread with just quick explanation.
Answering your question - yes, tried different modems and used EE and BTU firmwares.
Phone was bought factory unlocked (new), so BTU version should work, but it doesn't.

@JJEgan
https://forum.xda-developers.com/galaxy-note-3/help/phone-doesnt-detect-network-operator-t3661897

Please ask a mod to delete this thread .
Sent from my SM-N930F using XDA-Developers Legacy app

JJEgan said:
Please ask a mod to delete this thread .
Sent from my SM-N930F using XDA-Developers Legacy app
Click to expand...
Click to collapse
Who is mod in here? Sorry, not very experienced in forum.

Thread can be closed - phone after couple of days eventually connected to the network itself. Weird.

nadaall said:
Thread can be closed .
Click to expand...
Click to collapse
Done.
Razvan
Forum Moderator