Develop Bugs

No service on TW 4.4, works on GE 4.4

So I was running Danvdh's 4.4.2 Google Edition ROM, and the hybrid MK2/MDL modem from here: http://forum.xda-developers.com/showthread.php?t=2544612.
I flashed back to MDL stock (downloaded the MDL firmware from SamMobile, and found stock MDL baseband (without MK2) to go back to complete 4.2.2 stock. Then I updated via Kies to 4.3 with the MK2 baseband and bootloader (obtaining Knox). I then updated to 4.4 via the OTA because Kies 3 said that MK2 was the latest firmware for my device.
After all that, I was on stock 4.4 NB4, and used CF-AutoRoot to root. I odin'd TWRP so I could put a custom kernel on (I remember 4.2.2 had a root-checker to prevent root from staying in the /system folder). After making a backup with onandroid, I was playing around with my GP ROM to see if the backup still worked. It did so I went back to the NB4 backup and I no longer had service, and wifi didn't work. I've tried flashing via odin the MDL modem, MK2 modem, NB4 modem; nothing works. Menu states that the baseband is "Unknown." However, when I reflashed the GP ROM, everything works again.
So...TL;DR I made a backup of stock rooted 4.4, but it was corrupted and now I can't go back to stock until someone uploads the full firmware or a backup.

How To Update and Root to 4.4.4

Hi, sorry this is probably a noob question but I've been reading through the forums and got confused how to update my rooted s4. Normally I would just install the custom rom with the update but it seems like this isnt the case right now.
I'm currently on 4.2.2, rooted, and have wicked as my rom. How would I update to 4.4.4? From what I understand there is a new modem and firmware... something to do with NH7? Can someone explain to me what NH7 does. Thanks for all your help!

NH7 is the newest firmware based on 4.4.4 and it is recommended if you plan of using 4.4.4 tw roms. To update it just download the NH7 firmware from general thread and flash it with Odin, after that you can use cf-auto root to root, or if you're just planning to flash a ROM then just flash recovery and then flash ROM.. If you care about tripping your Knox counter then just know that flashing recovery or rooting will trip it

babexdragon said:
Hi, sorry this is probably a noob question but I've been reading through the forums and got confused how to update my rooted s4. Normally I would just install the custom rom with the update but it seems like this isnt the case right now.
I'm currently on 4.2.2, rooted, and have wicked as my rom. How would I update to 4.4.4? From what I understand there is a new modem and firmware... something to do with NH7? Can someone explain to me what NH7 does. Thanks for all your help!
Click to expand...
Click to collapse
You mention that you want to update and that under normal circumstances you would simply flash the an updated custom ROM... yet you say you've read it isn't that simple, right?
You are correct, it isn't THAT simple, but it is ALMOST that simple. Being as that you are still on the old 4.2.2 pre-KNOX bootloader and all, you can flash and flash and flash all day long and a single use of Triangle Away is all you'd need to still be able to revert your device back to 100% stock, both firmware AND flash counters if you ever needed to for some reason. If you use Odin, Kies, or take an OTA update you will lose that ability. Anything you flash once you go through official channels to update will trip your KNOX counter... and that cannot be reset. The problems you've read about simply flashing an updated custom ROM is that you will have problems with data.
The data drops can be avoided by flashing the newest modem, which would be NH7. Understand though, that method only updates your GSM modem; your LTE modem would be unaffected. This would only be a problem though if you are having trouble receiving LTE where others with the same carrier can get it with no problem. If you aren't having any problems with LTE, then I would recommend to simply update your GSM modem and use the custom recovery of your choice (ClockWorkMod, Philz Touch, or TWRP) to flash any of the ROMs in the T-Mobile GS4 Android Development section.
To update your GSM modem, follow the instructions in this thread. That thread is for updating to the 4.4.2 NB4 modem, which that modem would actually be all you need; but if you wish to have the NH7 modem, just use the modem.bin ONLY file from this post instead of the modem package included in the tutorial thread. After that little bit of work, you can flash any Android version you want; from 4.2.2 all the way up to 4.4.4... AOSP, TouchWiz, or the Google Play Edition ROMs.

So from what I understand...
1. Update the modem not firmware
2. Flash ROM
So I don't need to re-root?

You are correct.
No need to re-root.

Need help - still on 4.3 MDL bootloader, I want to grade to 4.4.4

Hi.
I'm really out of the loop for flashing to the latest rom. I'm still on 4.3 Darthstalker Version X1. I want to upgrade to the latest 4.4.4. I've try flashing a few roms but I couldn't get the wifi to turn on so I want to know what I'm doing wrong.
I've flashed the NH7 modem.bin from Shinnyside's thread. I didn't flash the non-HLOS file because after flashing just the modem.bin file I can see the NH4 modem is sticking and everything still work on 4.3. I then flashed a few different rom but I couldn't get the wifi to turn on. Is it that I'm getting this problem is because I didn't flash the non-HLOS modem? If I flash the non-NLOS file, will it solve the wifi problem I'm having?
I also read some post that I need to update to the NH7 bootloader (i'm still on the mk2 bootloader) for some 4.4.4 feature to work. How do I do that?
Thanks in advance for your help.

Either try a different kernel or update to NH7 firmware, then flash ROM

Hi serio22,
What kernal can I try? How to I update to the NH7 firmware? Thx.

Look in here.
http://forum.xda-developers.com/showthread.php?p=54155517
Pp.
sent from my microwave running lollipop 5.0.

daihung1 said:
Hi serio22,
What kernal can I try?.
Click to expand...
Click to collapse
Any custom kernel like ktoonsez or alucard for example.. Also make sure you update your modem if you don't want to update to the latest firmware

Explanation needed for baseband

Hello experts,
I need an explanation for the following issue:
- M919 flashed via Odin with NK2 stock firmware
- flashed TWRP via heimdall
- flashed Mokee firmware via TWRP
- baseband is changed to M919UVUFNB4
Now I flashed my wife's M919 which is on M919UVUEMK2 with Mokee but the baseband stays at MK2. Why?
Do I need to flash her phone to NK2 and then flash Mokee to get the M919UVUFNB4 baseband?

Why would you want NB4 baseband?
You may have had mismatched baseband /bootloader on your phone to begin with.
You should always have the latest modem running NH7 or NK2, even if you downgrade bootloader.
Pp.

The point is why was the baseband downgraded when I flashed Mokee on my phone but not upgraded when I flashed Mokee on my wife's phone?

Mokee roms will not install modem or change firmware, these are not included in the rom.
Your baseband must have been at NB4 before you flashed mokee.
Its possible that when you flashed the stock firmware the modem didn't stick and stayed NB4.
Your wife's phone had the matching baseband /firmware already, so it stayed the same.
All you have to do is flash the nk2 modem on your phone using Odin and you'll be all set.
Pp.

@PanchoPlanet: Yes you are right. While flashing the stock ROM NK2 the modem didn't stick. I had to flash it 3 times on my phone and 2 times on my wife's phone. Now they are both on NK2 baseband. But unfortunately that didn't solve the low WiFi signal on my wife's phone...

If you can see a side by side comparison of both phones on the same wifi network and one has more signal than the other, you may be having a hardware issue with your wife's phone.
Hardware related could be the physical radio on m/b or the antenna wire.
Find a wifi analysis app in the play store and run it on both phones and check your readings.
If they match it could just be that the displayed value could be off.
Pp.

No connectivity after baseband downgrade (I9195)

I'm trying to use galaxsim unlock to unlock my I9195. The app says that I need a baseband ending with MJ7 or older.
At the moment the phone is on stock firmware
I9195XXUCOD3, which is android 4.4.2.
I have tried using Odin to flash two different modem files, one is a MJ7 modem file that I downloaded on its own, the other one is one that I extracted from some older 4.2.2 firmware. In both cases they flash successfully, the phone boots up, but there is neither mobile nor wifi connectivity. I assume that this is because the older modem file is not compatible with the newer firmware? I have successfully extracted modem files from stock ROMs and flashed them in the past, so I'm fairly sure I'm doing that bit properly.
I have also attempted flashing the older 4.2.2 firmware in it's entirety, rather than just the modem file, but it won't flash because the bootloader is older than the current one.
Any help for how I go from here would be greatly appreciated.
edit: i have also now tried flashing the I9195UBUBNE2 brazilian firmware that allows for downgrading from 4.4.2 to 4.2.2. even with this firmware, there is still no connectivity after i flash the MJ7 modem. so as far as i can establish, any MJ7 or older modem is not compatible with the later bootloader?