Downgrading the baseband(Solved)

[Konomastiker]

You can grab H3123 firmware here: https://forum.halabtech.com/vb/show...65_50-1-A-4-76_R5A-halabtech&p=24586&langid=1
PS: if you cant grab emma, try newflasher from xda, works perfect.

 

[li0nh3art3d]

You can grab H3123 firmware here: https://forum.halabtech.com/vb/show...65_50-1-A-4-76_R5A-halabtech&p=24586&langid=1
PS: if you cant grab emma, try newflasher from xda, works perfect.

I think I figured it out. What I've learned:

1. Sony Mobile support is completely, 100% worthless.

2. Emma must be downloaded as a zip file from sony mobile open devices website, not the exe from the Emma page. Previously the zip did not work on the H3123, however I read somewhere they were going to fix it, and they did apparently because it's recognizing my device now after connecting to the update server, even though the download says from November 2017, it does indeed update and doesn't ask for a username and password.

I am about to update (err downgrade?) now I'm just backing up my files since it wipes the userdata.

For some reason when I tried Newflasher before, I got a bootloop, and upon running the fastboot command fastboot getvar all, the culprit seems to be that the baseband didn't downgrade with the rest of the firmware, thus resulting in bootloop since it can't be mismatched

 

[Konomastiker]

It seems to me, that even when i downgrade to 4.76 and upgrade to 4.102, there are still some "rests" of 5.59 on the device. When i was on original 4.102 that my device came with, i was able to install Xposed Framework directly from Magisk manager and then simply install Xposed Installer apk. But now i have to boot to twrp, patch boot.img again with Magisk zip, then flash Framework zip, reboot twice and only then i got "green" in Xposed Installer and GravityBox works.

 

[li0nh3art3d]

So this is where I'm at. I'll let you know if Emma indeed accomplishes what Newflasher could not, which is downgrading the baseband

 

[li0nh3art3d]

Sucess!! Emma now works (It didn't when I opened this thread)

I'm going to go through the steps, magisk patching the boot.img, then installing Xposed with the app, which is what I did before when Xposed was working for me.

Thanks again @Konomastiker for reporting your success with Emma. The update was crucial.

 

[Konomastiker]

Glad to hear it worked for you!:good:

---------- Post added at 07:06 AM ---------- Previous post was at 06:52 AM ----------

Just an idea: if somebody is brave enough, he can try to flash 5.59 via newflasher and replace the 5.59 modem with the 4.102 one. Newflasher does not care, it flashes everything it founds in the directory. Theoreticaly this should work.

 

[baj24]

When I connect my device to Emma I don't see 4.76 as an option under services. Any advice? I have an h3123.

 

[Konomastiker]

When I connect my device to Emma I don't see 4.76 as an option under services. Any advice? I have an h3123.

I guess its model-specific, for h3213 there is a 4.76, for other models maybe not.