Hello XDA Community,
The phone would be working intact with the carrier despite of removing the SIM card as long as the phone is not restarted or the removed SIM is inserted into another phone which registers the SIM.
Well I realized that it has nothing to do with the ROM, Kernel, Modem Firmware as I've changed the many Custom ROM of different flavors, different kernels, different Modem Firmware and even with Stock but the result is same i.e., "It works without SIM!"
The make and model wouldn't be necessary with this query so I am omitted that.
I'm trying to understand how and why this is happening?
Any help is very much appreciated.
I came across similar query by cypho posted in way back 2012 and the astonishing thing is it still remains Unexplained by the XDA Community:
http://forum.xda-developers.com/showthread.php?t=1738417
Related
Okay, so I recently bought a Nubia z7 max, and it came fine working, sim card worked in lte, all the bells and whistles, the version was a multilang version of the 1.64 official software, so i used the official update tool provided by to update to a 5.0 android version of their software so it would repartition my internal memory in a way that CM12 would work, it worked. All was fine and dandy until I saw a friends Nexus 5 able to dual boot(using MultiRom app from play-store) i was so jealous of him that i copied his build.prop to my phone in an attempt to make my phone think it was a nexus 5. My idiotic attempt got my phone in a boot-loop, this resulted in me flashing a 3.09 version of the nubia software on it then TWRP and finally restoring from my CM12 backup using TWRP. But i have a problem neither sim slots seem to work, i already checked and the sim card works(by putting it into another phone), and no sim works on mine. I would really appreciate it if someone could help me recover my precious phone. Thank you in advance.
Hi, thank you for using XDA Assist. Yeah, never flash or copy system files from a different device than you have. You most likely need to flash the stock firmware on your device and start over to get the sim to work again. The best place to ask how to do this is in your device specific forum. See here, http://forum.xda-developers.com/zte-z7/help and also this, http://forum.xda-developers.com/zte-z7
Thread closed.
So, recently I bought this beautiful phone that came pre rooted with cuoco92's rom. I put my SIM in and was ready to go. But I messed up with titanium backup and deleted the system phone app.I could still call and all, but the menu while in call was gone so I could not hang up etc.
Then I obviously decided to re-flash the rom. Problem is when I did so, the phone's signal icon was grey with a small x . From there it went downhill. I flashed the rom and some others multiple times, I even returned to stock rom+recovery, and the problem changed from what I described to a simple No SIM Card.
The phone now does not acknowledge the SIM when i put it in at all, while before it did know it had a sim inside, it just would not work.
Is there any universal troubleshoot process I can try before contacting the shop and sending the phone back? Could this be hardware?
Note that today I changed my micro sim to nano sim since the phone takes both, in hope of solving it. But it did not work on both slots.
Thanks in advance.
Hello,
Verify that your IMEI(ESN) is still intact, if it is gone then you will have to restore it, the method to restore IMEI is different for each device so you'll have to research how to restore it on your device. I'm not saying that is your issue, I'm just saying it is something you need to check before going further because if it is gone then nothing else you do to troubleshoot/repair is going to work.
Try posting your question in the forum linked below.
http://forum.xda-developers.com/android/help
The experts there may be able to help. Good luck.
I checked my imei with the *#06# thing, it is there..
HI Friends, (@Vinay)
I am new here, and have specifically registered to seek your help
I have D2212 IN version which was SIM unlocked.
Apparently, I was successful in
1) Unlocking the boot loader
2) Installing Vinay's Custom Nitrogen ROM
Subsequently, I used the phone happily for over 1month and problems started happening where Phone lagged so much that it became unbearable.
Also at the same time, I noticed my phone would lose its network.
I would get a X next to SIM indicator. No Signal. I swapped the SIM into other phone, the SIM works fine.
I put other working sim in the E3 D2212, again no Network. No Data (2G, 3G). Only WiFi works
So I decided to roll back to D2212_18.5.B.0.26_Customized IN.ftf via Flashtool
Still no dice. I still see no network.
When I hit *#*#7378423#*#*
I think (repeat think) the phone is SIM Locked.
No matter which slot (1 or 2) I insert it, I don't get Network or DATA
But I can certainly vouch the Same Vodafone IN SIM was working on the phone earlier.
Any help in this regards is greatly appreciated.
Regards
Dharmesh Shah
Mumbai, INDIA
Did you flashed the stock rom correctly?
Well I thought so
HI @vincy009
Many thanks for responding. Appreciate your help.
Well I thought I did.
I referred to a few youtube videos to do it using flash tool.
Also, pls note, I also tried flashing back Vinay's Nitrogen ROM, that too would not get Network.
So,it was 100% issue with the way I was flashing the rom (Stock or other)
Eventually, I surrendered and sent the Phone to Sony who refused to fix it citing it to be out of warranty due to unlocked boot loader
So I had to submit to a local Mobile repair shop who fixed it.
But I am yet to ascertain what exactly he did.
In the mean time, I have already read the Newbie's Q&A and other threads where they explain how to use flash tool.
If there is an accurate thread/howto/etc, pls point me to that, so that I can avoid mistakes in future.
Maybe you done something wrong in flashing step or it wud have been any Lil hardware problem.. If wanna do new things always get a nandroid backup.. So it wont get mess up.
Hi, my phone is currently locked to carrier smart. Before flashing my first rom, as long as I had 1 smart sim card on any sim slot, the other one can read any other carrier. After flashing rom, if I insert 1 smart sim and another one from a different carrier, I get the network lock notification. It works fine though if I just use 1 smart sim only, or smart sim for both sim slots.
Any ideas on how to revert this? Or are there any unlocking apps I can try for free? Thanks!
Got that same phone few days ago, and as far as my knowledge goes the F and FD version shouldn't be network locked as they ship world wide (international model with exynos chip). From what you saying, its after you flashed the ROM you got the second card locked, so my first question would be what ROM have you installed ? and can you link me to it. 2nd idea or question.. Did you flash the FD ROM or the F one? the F is a single sim version, it does have the second slot in there actually but its disabled or locked, so it might be that the 2nd slot is disabled or something. 3rd, have you tried other ROMs ? or even stock firmware, you can confirm if the ROM is the issue.
And my advice is to not try the apps, most of them are either outdated that only work with exploits in old android versions, or a complete scam. Waiting for your reply.
Hi Salazar, thanks for answering! I already forgot what rom it was - that was about 6 months ago. I remember then I had a backup of my EFS and baseband using TWRP. I remember restoring those when I first encountered the problem - that's how I got my 2nd sim slot working again. Problem is I've already lost that backup, and when i reformatted my phone yesterday, the 2nd sim slot wouldnt work anymore. Just tried flashing a number of custom and stock roms earlier today - problem still persists. If you happen to have the same device (G930FD) - mind sharing your TWRP backup for baseband and EFS?
After successfully flashing havoc os onto my s8+, I noticed that my verizon sim card had no service. I tried multiple solutions from different people on xda, but none of it worked so I wanted to see if the sim card would work with the stock ROM. I went on multiple websites in order to download the firmware to flash through ODIN, but I am not sure which one to download because they are categorized by countries. I live in the US currently (The sim card is also US-based), but the phone is from Korea (it was one of my relative's phone there) so I am not sure which firmware to download.
I would appreciate if you guys would help me on either the sim card problem or just the stock firmware issue.
Thanks.
Edit: The problem is solved. After putting my phone into recovery mode, I found the actual product name was SM-G955N, not SM-G955F.