[Fixed] My SM-G955U Has No IMEI or Baseband

[MLIGN]

EDIT:
I was able to fix it! I had to install a custom ROM to obtain root and delete my EFS partition.

So, here is a bit of a story I will try to keep short.

I went to Vietnam and bought a S8+ from there.
It was a US S8+ from Sprint.
I used it fine there but when I came back to states I tried to put my Verizon sim in and it doesn't work.
I don't get any signal. But I am able to see Baseband and IMEI.

So, I tried to use Odin and flash one of the SM-G955U1 Firmware.
Now, my phone is weird and out with no Baseband or IMEI.
So I try to flash back to firmware it was on.
Same thing.

Any ideas why my S8+ is like this?

 

[JeffDC]

So, here is a bit of a story I will try to keep short.

I went to Vietnam and bought a S8+ from there.
It was a US S8+ from Sprint.
I used it fine there but when I came back to states I tried to put my Verizon sim in and it doesn't work.
I don't get any signal. But I am able to see Baseband and IMEI.

So, I tried to use Odin and flash one of the SM-G955U1 Firmware.
Now, my phone is weird and out with no Baseband or IMEI.
So I try to flash back to firmware it was on.
Same thing.

Any ideas why my S8+ is like this?

Can you get into recovery/download mode now? What was the last known version of software you know that was on your phone?

If you can get into recovery, what info are in those details?

 

[MLIGN]

Can you get into recovery/download mode now? What was the last known version of software you know that was on your phone?

If you can get into recovery, what info are in those details?

Sorry for the long wait. If you are still interested.

CARRIER: SPR
RPMB fuse blown
RPMB PROVISIONED
CURRENT BINARY: Samsung Official
SYSTEM STATUS: Official
FRP LOCK: OFF
WARRANTY VOID: 0x0
QUALCOMM SECUREBOOT: ENABLE
RP SWREV : B3(1,1,1,1,1) K2 S3
SECURE DOWNLOAD: ENABLE
DID: 205EDC8B7351

 

[MLIGN]

- duplicate

 

[JeffDC]

- duplicate

What happens if you restore from the OEM function?

 

[bonebeatz1234]

Try downloading custom recovery and flashing a custom rom. You will lose samsung pay but you might have a working phone it's a chance I would take if it was me. Your baseband is messed up try just flashing your carrier baseband . These are just ideas good luck

Sent from my [device_name] using XDA-Developers Legacy app

 

[paul_59]

If flashing a custom ROM will fix your phone then so will downloading latest official Samsung ROM and flashing via latest Odin .

The second option above would be the best to try unless you're happy to have a custom rom and lose Samsung pay and anything that relies on Knox being functional

 

[MLIGN]

If flashing a custom ROM will fix your phone then so will downloading latest official Samsung ROM and flashing via latest Odin .

The second option above would be the best to try unless you're happy to have a custom rom and lose Samsung pay and anything that relies on Knox being functional

Update on the post, I sent it into Samsung. I should hear word soon if they can fix it and how much if anything.

 

[dlbaragar1]

Jtag dead phone to life and rewrite IMEI

First of all my phone is the s8+ G955fd, but I am sure that the people that helped me can help most Samsung owners with bricked phones.
My phone ended up being stuck on the first boot screen, I couldn't get into recovery or download mode. I installed TWRP and after that I lost my IMEI numbers( dual sim), so I tried to reflash stock and thats when i became bricked. I searched someone to help and found reference to the Fonefunshop in England. I sent it there and they said that the eMMC chip was bad. I searched for someone who could write to it or put a new one on the motherboard . I found A2Z cellular in Ottawa Canada. They used jtag to restore it to stock and they told me that the Fonefunshop had not opened the phone which is necessary to use jtag as they claimed, so avoid them.

The phone was now back doing everything it should except the IMEI's were null like before. I gave them the original IMEI's and the phone is working like new.
If your Samsung is bricked these guys can probably fix it and it won't cost much to find out.

 

[Pariah24]

the SM-G955U has a locked bootloader, so people should not be telling you to flash a custom recovery or custom ROMs. there is only one way to get root on this phone, through the samfail exploit, and safestrap is the only working recovery. I don't believe it supports CDMA networks but I'm not 100% sure on that. I have this device and I'm only aware of GSM carriers using it.

 

[MLIGN]

Just an update on this issue. I still don't have a working Baseband or IMEI. Any clues?

 

[MLIGN]

I was able to fix it! I had to install a custom ROM to obtain root and delete my EFS partition via ADB.

 

[ionut2003]

I was able to fix it! I had to install a custom ROM to obtain root and delete my EFS partition via ADB.

Hi. Can you detail how you fixed you phone please? What custom rom did you use and the steps you used please? I have the same phone with the same problem.


Thanks

 

[zelendel]

I was able to fix it! I had to install a custom ROM to obtain root and delete my EFS partition via ADB.

Be very careful with doing that. It can cause the EFS (the partition that controls IMEI, Mac and a few other things) to be completely corrupted. Which will cause the device to be useless without fixing it.


Now a little heads up. As messing with the IMEI is illegal in many countries (the US being one of them) There are only 2 ways to fix an IMEI issue allowed on XDA.



1. Restore the backed up EFS partition

2. Return it to the OEM to be repaired.

 

[ElDuez]

What did you do after you deleted EFS? I can delete in Combination but I dont get the IMEI number back.