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[Q] LG 4X HD lost IMEI no network please help.

Hi, any help here would be greatly appreciated. My phone says no sim card and I have no network. Now that might not seem like a major problem but my phone has somehow lost its IMEI number.It has just gone! I have not changed the software it is just a standard phone. Any ideas how I get this IMEI back because without it my phone is useless? I have done all the usual factory resets but nothing works.

galaxy doing the same
bazza1410 said:
Hi, any help here would be greatly appreciated. My phone says no sim card and I have no network. Now that might not seem like a major problem but my phone has somehow lost its IMEI number.It has just gone! I have not changed the software it is just a standard phone. Any ideas how I get this IMEI back because without it my phone is useless? I have done all the usual factory resets but nothing works.
Click to expand...
Click to collapse
My wife's samsung galaxy s gt 5380i has suddenly decided not to let her text/call. service state says out of service, mobile network state says disconnected.Her sim works in my iphone, and she has 3 bars showing of her EE signal. I've checked everything I can think of, but no joy. I cleaned the sim contacts, but apart from resetting the phone I'm stymied. My t-mobile sim didn't work in the galaxy either. When trying to call an error message says no mobile network available. I bought the phone a couple of months ago on ebay, it's immaculate and worked flawlessly until this morning. Please help, wife is not impressed...

[Q] Need help with my network name!!!! please help

I recently damaged my old sim card and got my replacement two days back.
after i started using this sim card, in the scrolldown menu / lock screen, where the network name is displayed, i get: '[email protected]@@@@@@@@@'
now EE is my network. but these @s came out of nowhere. they arent there without this sim card
i have already ordered another replacement but meanwhile any quick fixes? maybe a way of changing the exact text thats displayed there?
specs
gt-i9300 non-lte
EE network (which functions normally by the way)
android 4.3 stock (can bee rooted if fix requires so.)
also this sim card has the so called quicktap / contactless payment feature and the previous one didnt
anything at all?
i rebooted, reflashed the firmware and also tried cyanogen. no use.

Ask in the i9300 forum.
Sent from my SCH-I535 using Tapatalk 2

Nexus 5 not registering on T-mobile Network

Phone's Settings read
Mobile Network Type- Unknown
Service State- Out of Service
Mobile Network State- Disconnected
My IMEI still shows up and I can connect to WIFI and bluetooth. The only problem is I can't get a signal, not 2G or 3G (even LTE)
This started happening out of nowhere, I tried taking out the sim, factory resetting, wiping caches, changing the APNs, restarting the phone, and I even put the sim in a new phone (It got signal).
If anyone has any ideas I'm all ears! What's the point of this amazing phone if I can't call people with it?

How long did you have the phone before this happened? Did you dial *#*#4636#*#* to check the phone info and change the network type?
I had a similar issue, but I think mine was a lot worse due to a dirty flash. I ended up having to do a fastboot recovery to restore it to factory.
Sent from my Nexus 5 using XDA Free mobile app

Raphael17 said:
Phone's Settings read
Mobile Network Type- Unknown
Service State- Out of Service
Mobile Network State- Disconnected
My IMEI still shows up and I can connect to WIFI and bluetooth. The only problem is I can't get a signal, not 2G or 3G (even LTE)
This started happening out of nowhere, I tried taking out the sim, factory resetting, wiping caches, changing the APNs, restarting the phone, and I even put the sim in a new phone (It got signal).
If anyone has any ideas I'm all ears! What's the point of this amazing phone if I can't call people with it?
Click to expand...
Click to collapse
What service are you with? I had this same exact issue a week ago with an LG G2. My Sim card would work in my Nexus 5 but wouldn't work in the G2.
After numerous factory resets I eventually called Metro PCS (my carrier) and I was told that whenever I put my Sim Card into a new phone I must always contact them and give them the new IMEI # so that the phone can work.
The Metro PCS rep claimed that they have a feature that disables the Sim from working in an unauthorized phone. I guess its to help with theft.
neXus 5

Hi, were you able to fix your issue? I am having the same exact issue and have done all troubleshooting I can do on my own but still nothing works.
If you have a method of fixing this please share.
Thanks,

iskyi said:
Hi, were you able to fix your issue? I am having the same exact issue and have done all troubleshooting I can do on my own but still nothing works.
If you have a method of fixing this please share.
Thanks,
Click to expand...
Click to collapse
I know this is really OLD!!!!
but i just had the same issue today
with a NEXUS 5 running stock marshmallo 6.0.1 with the latest patches
, and yes... is not the phone is the carrier
MetroPCS do IMEI lookup
i had another phone before the NEXUS 5
so it is no just matter of swapping the SIM card from one phone to the other
you need to call CS and you told them that your phone is not registering on the network
and that you just swapped phones
So they ask you for the IMEI of the "new" phone
and your SIM card #
you reboot your cell
and VOILA!
now the phone registers in the network
Yes, Metro do IMEI authentication

'Mobile Networks' Disappeared from Settings

I have the 920F model and activated it with a UK sim a few months ago.. Have been using a US sim for the past 2 weeks, but today I went into an area with no service for a bit. Went back into an area with service and suddenly it says 'Not registered on network' when I go to make a call and 'No SIM card'.
I have gone into flight mode, cleaned and checked SIM (not a problem with the card), and then when I went to check the APN settings I noticed there was no way to get into my 'Mobile Network' settings! Its just gone!
Is it possible that it has reverted back to the European region lock and is awaiting a European SIM to be inserted before I can re-insert my US?
If it is a region lock, is there anyway to unlock it without using a European SIM as I no longer have mine and dont have quick access to one either.
Any help is appreciated. Hoping there is an easier fix.

I think airplane mode disables that menu. Did you try to take it out of airplane mode again before looking for the menu?

cawith said:
I think airplane mode disables that menu. Did you try to take it out of airplane mode again before looking for the menu?
Click to expand...
Click to collapse
Yeah, its not in flight mode anymore. I think it might be a region-lock issue but no way of knowing until I can get my hands on a UK sim!

amber12129 said:
I have the 920F model and activated it with a UK sim a few months ago.. Have been using a US sim for the past 2 weeks, but today I went into an area with no service for a bit. Went back into an area with service and suddenly it says 'Not registered on network' when I go to make a call and 'No SIM card'.
I have gone into flight mode, cleaned and checked SIM (not a problem with the card), and then when I went to check the APN settings I noticed there was no way to get into my 'Mobile Network' settings! Its just gone!
Is it possible that it has reverted back to the European region lock and is awaiting a European SIM to be inserted before I can re-insert my US?
If it is a region lock, is there anyway to unlock it without using a European SIM as I no longer have mine and dont have quick access to one either.
Any help is appreciated. Hoping there is an easier fix.
Click to expand...
Click to collapse
Im currently having the same problem with my 920f. I dont think it is region lovk because i am using mine in the same region that it was produced for. If you have fixed the issue pls tell me how you did it. I also noticed that whenever you connect it to the pc, it is not being recognised.

Khaliboy07 said:
Im currently having the same problem with my 920f. I dont think it is region lovk because i am using mine in the same region that it was produced for. If you have fixed the issue pls tell me how you did it. I also noticed that whenever you connect it to the pc, it is not being recognised.
Click to expand...
Click to collapse
Mine does connect to my PC. Haven't found a fix though - going round and round with Samsung and they say I have to bring it into a UK Samsung centre but I'm now in the US!
Going crazy!

Khaliboy07 said:
Im currently having the same problem with my 920f. I dont think it is region lovk because i am using mine in the same region that it was produced for. If you have fixed the issue pls tell me how you did it. I also noticed that whenever you connect it to the pc, it is not being recognised.
Click to expand...
Click to collapse
If you go into your settings, under 'connections' does Mobile Networks appear? Try checking your APN Settings if so.

Has anyone found soution to this issue, and how did you fix it?

I am facing the same issue with my Galaxy S7 Edge (dual Sim) as i was traveling to another country (Europe). My phone is unlocked. I had to reboot in order to get back the "Mobile Networks" option.

geovass said:
I am facing the same issue with my Galaxy S7 Edge (dual Sim) as i was traveling to another country (Europe). My phone is unlocked. I had to reboot in order to get back the "Mobile Networks" option.
Click to expand...
Click to collapse
Sadly reboot did not help me, same as different modem, radio, firmware, SIM card...
Still have no solution to this, if anyone can solve it, ill buy him a beer.

Same issue
Hi,
I currently have the same issue and I don't know what to do! Did you find any solution? I am really confused.

check if your imei is still good

amber12129 said:
I have the 920F model and activated it with a UK sim a few months ago.. Have been using a US sim for the past 2 weeks, but today I went into an area with no service for a bit. Went back into an area with service and suddenly it says 'Not registered on network' when I go to make a call and 'No SIM card'.
I have gone into flight mode, cleaned and checked SIM (not a problem with the card), and then when I went to check the APN settings I noticed there was no way to get into my 'Mobile Network' settings! Its just gone!
Is it possible that it has reverted back to the European region lock and is awaiting a European SIM to be inserted before I can re-insert my US?
If it is a region lock, is there anyway to unlock it without using a European SIM as I no longer have mine and dont have quick access to one either.
Any help is appreciated. Hoping there is an easier fix.
Click to expand...
Click to collapse
Depends on whether your phone has an imei, and whether you have to unlock it.

filiphch said:
check if your imei is still good
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Click to collapse
SN and IMEI is good in about the phone, when dialing *#06#, and in service mode (*#0011#) says IMEI: OK.
As for sw, I don`t see anything that is not good, anymore.
For half a year I am trying to find a solution to this issue, tried almost everything, even writing clean cert.
Last thing I am going to try is sim reader replacement, at the begining of next month, and see if that will help.

any progress on the issue? im having the exact problem,was using it one day and it just started saying 'no sim card' inserted even tho when i put in a sim it says 'sim card added' but right after goes back to saying 'no sim card inserted' , plus the mobile networks option had disappeared from settings. also, mine does not connect to my computer and it charges slow. my technician diagnosed it as either the mother board issue or the usb port and sim card reader issues respectively. will try a factory rest and see if that's any help.
*update* factory reset did not help.

I just upgraded to 6.0.1, canadian G920W8, I put it in airplane mode, I removed airplane mode and the cell network never got back up.
Thoughts?

I was able to get my connectivity back after a factory reset from the recovery partition. I am now afraid to push on "airplane mode" as I fear I will be locked out of service again...

factory reset did not work for me, tried both from recovery and settings, any other solution?

Hello!
I'm having the same problem. Is anyone who tried the software downgrade to lollipop??

I tried both Lolipop and Marshmallow, still the same..

anyone figured this out ? I have exact problem on my sm-g930f.

S6 (G920F International Version) No Network Selection/NO SIM DETECTED

Hello,
A friend of mine has a new S6 which is unlocked to work with any network/sim. The phone was working perfectly for a few months.
Now for some reason, it gives the message that no sim detected. Signal bars show up. But no connectivity.
The option in settings Select Network Operator is gone, and no longer there.
I have tried re-flashing stock 5.1.1 ROM and still the same problem. Tried flashing previous 2 modems and got the same error, so flashed back to current one.
Current Baseband: G920FXXU3QOKN
Kernel Version: 3.10.61-5896496 [email protected]#1
Another thing to note is that the phone shows signal bars perfectly, even though there is the no sim message. Also, on removing and re-inserting the sim, it reads the sim and asks to reboot, after which it comes to the same situation.
Any help would be appreciated.
Thanks,

I have same issue, and would gladly fix it. :/
Link to topic:
http://forum.xda-developers.com/galaxy-s6/help/g920f-network-issues-t3291903

brenner650 said:
I have same issue, and would gladly fix it. :/
Link to topic:
http://forum.xda-developers.com/galaxy-s6/help/g920f-network-issues-t3291903
Click to expand...
Click to collapse
Check to see if your imei is intact still in settings
Hears a link to help http://www.technobezz.com/how-to-fix-galaxy-s6-not-registered-on-network/

xstokerx said:
Check to see if your imei is intact still in settings
Hears a link to help http://www.technobezz.com/how-to-fix-galaxy-s6-not-registered-on-network/
Click to expand...
Click to collapse
IMEI was reset to 350000000006, then some Russian guy fixed it with Z3X box, SIM was able to register, but reception was awfull (lots of missed incoming calls, etc.). then I flashed some more fw and modem to check wheter it would fix dropping signal issues, and then it started not to recognize SIM.
So to sumarize, IMEI (with my EFS, not @tazaga one) is fine in the IMEI info, in SIM info everything is unknown, and mobile networks menu is missing from settings.
I changed SIM for a new one, just to be sure, and is detected only when inserted/removed, then phone wants to restart to enable mobile networks, but after restart, nothing changes.
Serial number was changed, but I corrected it in a file in EFS folder.

brenner650 said:
IMEI was reset to 350000000006, then some Russian guy fixed it with Z3X box, SIM was able to register, but reception was awfull (lots of missed incoming calls, etc.). then I flashed some more fw and modem to check wheter it would fix dropping signal issues, and then it started not to recognize SIM.
So to sumarize, IMEI (with my EFS, not @tazaga one) in fine in the IMEI info, in SIM info everything is unknown, and mobile networks menu is missing from settings.
I changed SIM for a new one, just to be sure, and is detedted only when inserted/removed, then phone wants to restart to enable mobile networks, but after restart, nothing changes.
Serial number was changed, but I corrected it in a file in EFS folder.
Click to expand...
Click to collapse
Ya by the sounds of it something is still funky in your efs folder

As far as my problem is concerned, the IMEI and the SERIAL number both match the inside and outside. So its not that.
Any other suggestions as to what it could be? Or how to fix?

Flash stock with smart switch but before that make efs backup ( in case things goes down )

Already tried smart switch and also Odin to flash stock. Neither worked.
Would flashing an EFS backup from another phone with the exact same model work?

KMAT said:
Already tried smart switch and also Odin to flash stock. Neither worked.
Would flashing an EFS backup from another phone with the exact same model work?
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Click to collapse
well I tried to flash @tazaga efs, IMEI gets unknown right after that, but managed to boot up without custom kernel after Smart Switch initialization.
Beside that nothing changed, still no SIM and no mobile networks menu, and sadly couple hours later, phone went to a boot loop.
I took it to some 3dr party repair shop, without restoring original efs and bootable fw/kernel, they said they cannot repair it, but will give phone to some "software specialist" who may be (I seriously doubt it, according to my prevoius experience with 3rd party sw specialists (last time it took me half a day to reach the state phone was in when I deliverd it to them)) able to fix it with a 50-50% chance of fixing it.

brenner650 said:
well I tried to flash @tazaga efs, IMEI gets unknown right after that, but managed to boot up without custom kernel after Smart Switch initialization.
Beside that nothing changed, still no SIM and no mobile networks menu, and sadly couple hours later, phone went to a boot loop.
I took it to some 3dr party repair shop, without restoring original efs and bootable fw/kernel, they said they cannot repair it, but will give phone to some "software specialist" who may be (I seriously doubt it, according to my prevoius experience with 3rd party sw specialists (last time it took me half a day to reach the state phone was in when I deliverd it to them)) able to fix it with a 50-50% chance of fixing it.
Click to expand...
Click to collapse
Dude it it can be fixed its just you need octoplus box or z3x box

tazaga said:
Dude it it can be fixed its just you need octoplus box or z3x box
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Click to collapse
I understand that, but I kinda doubt that no SIM issue is somehow tied to IMEI
Because with my efs backup (which was made after Z3X repair) IMEI is fine, but still no SIM.
I was kinda hoping that it could be something else in the EFS folder that made SIM undetectable, but even with your efs backup (thank you once again for it) SIM is not detected, so I guess that no SIM issue is tied to something else that is corrupted, or accidentally switched off.
I just dont know what could it be, because I was messing with service mode and codes unknown to me to try fix poor reception, so god knows what I did to put the phone in state in which is now.
Perhaps I am just trying to provide every information possible, and exchange it with others who have same issue, or more experience than me, so we can together figure out what has caused this and how to fix it, and help others who will have same issue in the future (and obviously I am not the only one with such issue).
And as I pointed out 3rd party repair shops didnt proove quite usefull (perhaps their services are just flashing/rooting/unlocking, but I can do that by myself without paying someone else to do it)
We will see next week, what will guys from repair shop say, but I am not very optimistic about that.
If nothing else I can still give some money to that Russian guy with Z3X, who fixed IMEI in the first place, I guess he won`t mind
And sorry for the OT.

This problem still going on with exact answer..
I also have same issue on customer's phone.
I've tried backup cert and efs then repair efs (on octoplus).
after repairing efs, it changed IMEI to 3500...006 but still no sim card.
Seems like I can't fix even with Octoplus.
Hopefully someone finds way to fix this asap ;(

So apparently EFS and stock firmware has been ruled out. I already tried different modems using Odin.
Anyone have any other ideas? I mean other than the Sim Not Found thing, I can't even see the network selection option in settings, and using *#*#4636#*#* only gives an error that not registered on network.

well @ariza27 made similar fix for S3...
http://forum.xda-developers.com/galaxy-s3/help/solved-siii-network-problem-update-sn-t1918601
I guess there is nothing to do but wait for developers to create something for S6.

If I am understanding that problem correctly, the SIM/Network problem in the S3 came from the SN or IMEI changing due to upgrade or flashing.
This phone has the same SN/IMEI inside and outside. And its not just refusing to register the SIM, the network options have disappeared as well. I had hoped flashing stock would help, but no cigar.
One thing though, would completely erasing the data partition, and wiping the entire firmware, and then installing stock or even another ROM help? Because even when flashing through odin, it preserved the data for some reason.

Can someone send me their EFS backup for G920F on v.5.1.1 Stock with baseband/modem G920FXXU3QOKN?
I don;t know if those things affect EFS or not, just want to be on the safe side. I want to try comparing the backup from my phone and one other and then try and restore using the 2nd one.
As far as the IMEI and SN changing goes, I am looking into how to prevent that in the first place on in the even that it happens to restore it.
Any help is appreciated.

Bump! Anyone?

Your imei number has been blocked/blacklisted because of a reason like lost or stolen phone, reported by previous owner, the only way to fix it is to replace the motherboard of the same model from a supplier on aliexpress website, there price is about $350.00 Australian dollars thats including EMS express postage,you get it around 4 or 5 working days, dont waste your money or time on anything else it won't work, I had same problem, now after new motherboard my galaxy s6 edge is working fine, expensive though.

Any luck with this issue?

wilksy1 said:
Your imei number has been blocked/blacklisted because of a reason like lost or stolen phone, reported by previous owner, the only way to fix it is to replace the motherboard of the same model from a supplier on aliexpress website, there price is about $350.00 Australian dollars thats including EMS express postage,you get it around 4 or 5 working days, dont waste your money or time on anything else it won't work, I had same problem, now after new motherboard my galaxy s6 edge is working fine, expensive though.
Click to expand...
Click to collapse
The phone was purchased new. And Already spoken with both Samsung and Vodaphone regarding this and they say the IMEI and the phone are clear. The phone is in another country from that of purchase, but since there is no country lock or phone lock, this is not the problem.
And no such luck yet.