[Q] Losing signal due to new modem? Your thoughts?

[omgbuffguy]

Hello, I hope everyone is well and good. I apologize for the long post but I figured if I explained my problem in detail it would be better.

I have a samsung galaxy s3 i9300. My phone is rooted. There is a specific problem which I have been facing for months now and I have done A LOT of research on it but still cant understand it/fix it.

Basically, the problem I am facing is whenever I flash a ROM which changes my modem/baseband (such as Omega/Ultima), I lose connectivity to my carrier. (I live in Pakistan ).

I have tried the following when that happens(All during my Omega flash):

1)Check if my IMEI is intact. It is. (I have EFS backups too)
2)Check if my serial # is different. It is still the same (No need for Ariza Patch)
3)Check if my SIM works. It does on different phones.
4)Check my APN settings. They were fine. I even manually changed them to match the carriers
5)Change my CSC settings (using the playstore app). Still doesnt work.
6)Check different modems from the appropiate thread (I have tried Europe Unbranded, Middle East, Egypt and many others)
7)Restored nandroid backup of original stock 4.1.2 Sammy ROM, still not connectivity.
8)Flashed using ODIN, the stock 4.1.2 ROM for my country (Using SAM mobile)

And every time that happens, I have to send in my device to my local repair shop which takes about 4 days for me to get my device back. I am currently on Paranoid Android 3.57 but the camera connectivity problem makes me want to pull my hair out. I would like to go to OMEGA.

So before I go back to Omega and try again, I think I have figured it out but needed someones opinion on it. I understand I should test is myself first but I really need my phone for the next month for personal purposes so need a green light of sorts . I personally think since everything else is fine, maybe there is an issue and incompatibility with the RIL and the BASEBAND. According to GetRIL app from the playstore, my RIL and Baseband do not match.

RIL: I9300XXDLIB
Baseband: I9300XXELLA
Recommended: I9300XXDLIB.

Can this be the cause of me losing reception to my carrier? (This screenshot was taken on Paranoid Android)

Heres some useful info on what makes my phone work on stock:
AP: I9300XXEMA2
CP: I9300XXELLA
CSC: I9300OJVEMA1

Attached are also pictures of my settings. Thank you in advance. Please help me out someone

EDIT: The two stock screenshots I have attached below are when my s3 works perfectly fine. And the last Paranoid Android screenshot shows that as long as I dont change modems/basebands, my phone still works.

 

[danarama]

The RIL comes with the ROM and often don't match if you change the modem. I really doubt this is the problem.

You should never need to touch the RIL, but definitely never touch it on an AOSP rom.

Only use getRIL on samsung ROMs

Sent from my GT-I9300 using Tapatalk 2

 

[omgbuffguy]

The RIL comes with the ROM and often don't match if you change the modem. I really doubt this is the problem.

You should never need to touch the RIL, but definitely never touch it on an AOSP rom.

Only use getRIL on samsung ROMs

Sent from my GT-I9300 using Tapatalk 2

So I can use the GetRIL app on Omega since its a samsung based ROM?

Any idea what could be the problem?

 

[danarama]

Yeah definitely can use on omega.

Really not sure what the problem is. Maybe efs gets a bit corrupt? Try using philz recovery and backup efs before flash?

Make sure you format system before flashing.

If you have a baseband that works best, keep it at hand to flash.

If aroma installer allows you not to flash modem, choose not to.


Also perhaps try aosp camera mod by theunknown in themes and apps for s3. Maybe you don't need to.leave PA....



Sent from my GT-I9300 using Tapatalk 2

 

[xclub_101]

Hello, I hope everyone is well and good. I apologize for the long post but I figured if I explained my problem in detail it would be better.
...

I believe I have seen a very similar problem on a number of phones - your EFS database is "strange" (it was unlocked with some very old version of unlocker) and it needs a very special version of patched modem to work - check the ariza thread - and install the ariza patch even if apparently it is not needed!

 

[omgbuffguy]

I do format system and do a full wipe before installing ROMs.

Okay I will try the ariza patch. Just waiting to get a microsim adapter so I'm not left without a phone .

Last question. Is there a way to backup my current modem(through an app like titanium backup or otherwise) or manually insert my current modem into omegas or any other ROM? Or I force my phone to keep my modem between ROM flashing?

Sent from my GT-I9300 using xda app-developers app

 

[Striatum_bdr]

The best way is to remove the modem bin file from the rom zip and the lines in the install script file (generally the script is commented so easy to find) so your modem will be unchanged.

 

[omgbuffguy]

The best way is to remove the modem bin file from the rom zip and the lines in the install script file (generally the script is commented so easy to find) so your modem will be unchanged.

Can you please explain it a little bit? Basically after searching online, all i understood was I open up Omega's zip using a program like 7zip, navigate through and replace the bin file with my stock one?

But I dont have my stock modem in zip format. Its in the form of a nandroid..

 

[Striatum_bdr]

No just remove it. There is no need to have a modem file to flash a ROM. Then go in the script installation file and remove the lines that flash modem to avoid errors during flash process. Or just remove the lines without removing the modem file it won't be flashed.

The script is in Meta-inf>com>Google>android. Generally there are comments so the lines to remove are easy to find modem is generally flashed at the end of the script.

 

[omgbuffguy]

No just remove it. There is no need to have a modem file to flash a ROM. Then go in the script installation file and remove the lines that flash modem to avoid errors during flash process. Or just remove the lines without removing the modem file it won't be flashed.

The script is in Meta-inf>com>Google>android. Generally there are comments so the lines to remove are easy to find modem is generally flashed at the end of the script.

Okay so i just realized one thing. When i installed omega right now, and tried to change the csc using the app to my country, it reset my phone like it was supposed to, but did not change the csc. What does that mean? I dialed *#1234# and the csc remained the same. This is my original stock settings:

AP: I9300XXEMA2
CP: I9300XXELLA
CSC: I9300OJVEMA1

The current settings are:

AP: I9300XXEMF1
CP: I9300BVEMF1
CSC: I9300ONEEMF1

I used the csc changer app from the playstore. The changing the csc using the manual *#272*IMEI# does not work for some reason.

 

[danarama]

Okay so i just realized one thing. When i installed omega right now, and tried to change the csc using the app to my country, it reset my phone like it was supposed to, but did not change the csc. What does that mean? I dialed *#1234# and the csc remained the same. This is my original stock settings:

AP: I9300XXEMA2
CP: I9300XXELLA
CSC: I9300OJVEMA1

The current settings are:

AP: I9300XXEMF1
CP: I9300BVEMF1
CSC: I9300ONEEMF1

I used the csc changer app from the playstore. The changing the csc using the manual *#272*IMEI# does not work for some reason.

Maybe it's an Omega problem. have you asked in the Omega thread?