IMEI says "unavailable" and signal isn't working - Samsung Galaxy S9 Questions & Answers

I have a Galaxy S9+ that usually runs AlexisROM (Android 10) but I recently switched over to Lineage in order to try a stock Android ROM. As much as I liked it, I am too used to Samsung ROMs so I decided to restore my TWRP backup and the problem started happening. I tried reinstalling AlexisROM (clean install) but the problem remains, IMEI unavailable. I tried accessing the service menu (*#06#) but it just results in a black screen and a frozen device.
I am thinking about returning the device back to stock by installing the latest firmware from sammobile, do you guys think that would fix the issue? Or is there something else I can try in the mean time? It's my secondary device so I am not in a hurry if there's a fix out there somewhere without having to go through the hassle of going back to stock.
Sorry for the long post and thank you
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Check following post of mine. Unfortunately I didn't succed in echo cancelling but installing just a modem firmware could help in your case also.
Samsung S9 modem problem - echo, empty IMEI
Hi, I bought Samsung S9 SM-G960F Exynos and have problem with echo during calls. The person who I'm calling to or who is calling to me hears ennoying self echo while talking on the other mobiles. I've tried different sim cards, operators...
forum.xda-developers.com

Related

Big problem after flashing ... "Searching"

Hi, everyone I had a rooted GS2 and yesterday I flash the lightly tweaked ROM made by Mr. X for wifi calling. The phone was having problems with wifi calling, so i decided to flash the original Wifi calling update from T-mobile via ODIN and now after i flashed the phone it shows "searching" and it won't find the T-mobile network.
What do you guys recommend i do?
thanks
Flash the stock ROM, wait and see if it finds the network. If everything is normal, flash the update.
I dont think mrx rom requires an update being flashed, it didnt for my phone
Yeah people in the thread were having problems and i read somewhere that it was recommended to do what i did so the baseband number can be updated.
I have flashed back to stock ( the original update before the wifi calling update) and it still shows "searching".
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This is what I get when i try to manually select the T-Mobile network. BTW i took out my SIM card and put it in an unlocked iphone 3GS and it works just fine.
Any help? I basically have a brick laying around now.

SM-G925T Wifi Wizard at Startup! Please Help :(

I bought a used Model S6 Edge online and was working fine on any SIM card, so i was assuming it was factory unlocked as suggested by the seller.
After a month of usage my battery died and upon boot i was stuck at the FRP lock. I did my research and flashed the stock firmware.
Model - SM-G925T
Android - 5.1.1
Baseband version - G925TUVU3DOI1
After doing so im stuck with with WiFi connect to network at startup. I can't get past it.
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Please help. The phone was working fine before the FRP lock and firmware flash, similar to a any factory unlocked phone
Update:
I did a wipe cache/factory rest as well, no luck.
Never mind i got it working!
fezzan said:
Never mind i got it working!
Click to expand...
Click to collapse
How?
Please explain, it will help others and will promote what forums are all about.
People helping people.
Pp.
Well it just needed an active wifi connection to use the net for updates and previous google account. If you forgot your account use an OTG device with a usb, this will automatically open your browser and you can reset it. Check this video.
https://www.youtube.com/watch?v=DJ8_qbj1DPQ

Odin fails at "Custom Modem Binary", pulling my hair out here.

So I thought I'd relive a bit of nostalgia and I ordered a phone I used a lot back in 2012/2013, the Samsung Galaxy Ace 2 (GT-I8160), on eBay.
It arrived, but it was already rooted and was definitely sporting some custom rom. Seemed a bit odd. So I searched through my computer backups and found an Official 4.1.2 Stock Firmware for the I8160. Cool.... I'll just flash that with Odin.
NOPE.
When Odin gets to flashing the modem.img it fails, and on the device screen there's red writing saying "Custom Modem Binary !!". Weird. I decided that maybe this phone was from another region so I downloaded another official rom but it came up with the same error. i have now tried over 10 different region roms, including one for the I8160P. All failed. You can see on the device it clearly says "GT-I8160", so I really don't get where I'm going wrong.
I tried using emergency firmware recovery in Kies but it doesn't even recognise the device. Or at least it doesn't show up on the list of devices requiring firmware recovery.
Does anyone know what the hell I'm doing wrong?? It's almost as if I'm flashing the wrong device model. I'm stumped.
(PS. The 13 counts of custom firmwares in the image are from all the different roms I've tried to revive the device)
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Samsung Galaxy A50 (A505F) Rebooting issue

i'm facing this issue since july till now my phone just kept on bed and nobudy touched it and even no third party app i used it's automatically started restarting on logo and not getting start and some kind of lines are coming behind samsung logo i'll sahre you the pictures of it even i visit to service centre they are simply saying software is not happening in your phone it will take 9000rs we will change the mother board i mean seriously....
I reset my phone several time even i tried Software through odin latest & old all types of version but after click on start button it odin stuck on CM or BOOT and software not happening i tried PIT file I tried COMBINATION file but nothing is working give me the solution i already loss my job now don't have money for pay for this which is i'm not responsible this mistake is by your side this suffring from financial crisis please help...and give me the solution...
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Bricked Kernel
Hi, did you try something like custom ROMs, Magisk Modules, messed up with system files
Possibly that the kernel is dead
And if is not, your phone is COOCKED, its even OVER-COOCKED
And i little tip, try reboot in fastboot and try to get somehow your internal storage files

Samsung S20 no network after update

Hello, I bought a Samsung s20 phone, it was worked correctly, I see the network, I could call but ,I could not watch netflix, phone had android 11 netfix need upfate phone . It had updates January 2021 android 11, unfortunately when I tried to update normally i see a ..registration error,, popped up.
I decided to upload him manual updates android 12 I downloaded odin and ori soft with ,,sammobile,, I updated and now all applications work, unfortunately the phone sees the number after inserting the sim card and the sim unknown range is crossed
Before the update
I still remember that binary was custom firmware, so something was changed, unfortunately I did not take pictures
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AFTER UPDATE
IMEI STATUS IS NG what custom software to install to recover the network?
Hi
it could be simlock , and someone has unlocket its network with a Box , so now it has network problems ,
go to a samsung customer services Or someone who know about these Box and software issues

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