[Galaxy S 4 i9505 Original Android Development] FNetV1:
Has there been any progress in terms of the SPH-L720 (Sprint Samsung Galaxy S4)?

I would like to boot between TouchWiz 4.4.2 ROM and any AOSP ROM.

Reason: I really like the CM12.1 oprimized AOSP ROM I was running on my phone for the past few months until I hit a very bad stumbling block. My carrier is FreedomPop which is a MVNO that operates using the Sprint network, I live in New York and I have perfect Sprint coverage so therefore my service has always been perfect here. My family decided to go to a cruise (Carnival Splendor) and we flew to Puerto Rico on June 1st. The trip lasted till June 9th, by June 10th I was back to New York.

Problem: As soon as I arrived to Puerto Rico I discovered that my signal cell reception had an exclamation mark, the cell signal was great, just wasn't able to connect. I was determined that I needed to update my PRL in order to fix network connectivity issues, problem is that with the AOSP ROM I was running at that time Updating PRL was not possible, for that I needed any TouchWiz ROM. I was mad that I was not going to have service for the duration of my vacation. My family under the actual Sprint network using the same phone as I have had service.

So, this tiny little bit of stuff called "PRL" never crossed my mind, all was working well, so perfect, on the modified kernel CM 12.1 based on Android 5.1 (which I have updated twice via AntaresOne Updates) had my phone operating flawlessly, battery lasted almost twice as long as it did when I was running my bloatware stock rom when I first purchased this phone. But, it was this one thing that never crossed my mind that threw the party out the window and had me virtually incommunicado for over a week, the inability to update the PRL Over The Air.

So, now I realized that I do indeed need *A* TouchWiz rom to update my PRL here and there, but wont be using this ROM for my day to day operations as ALL AOSP ROMS doesn't come with a PRL update setting (correct me if I am wrong, but I have yet to find an AOSP ROM that has the PRL update setting present).

This is what I have done so far on my SPH-L720 Sprint Samsung Galaxy S4:

1. Installed Stock TouchWiz 4.4.2 and rooted it via CWM

2. Flashed: multirom-20141216-v30c-UNOFFICIAL-jflte.zip

3. Flashed: TWRP_multirom_jflte_20141216.zip.zip effectively replacing CWM with TWRP multirom version

4. Installed the MultiROM app from Google Play and was told by the app that I wasn't running a kexec hardboot patched kernel (in red text).

5. After spending over 5 hours googling for a patch for my 4.4.2 Stock TouchWiz ROM, I decided to give the following kernel a try:

Kernel-Alucard-V2.3ga-[20-41]-[11-11]-TW-EUR-KK4.4-SGIV-PWR-CORE.zip

So, I went ahead and flashed that and crossed my finger that it works. The ROM booted fine, so far it looks like everything is working fine, the MultiROM app says in green letters that I am running a kexec hardboot patched kernel, but something was not right:

PROBLEM: I am unable to connect to the Sprint towers, it looks like my cell radio disappeared totally, I dont even have the Data ON/OFF toggle switch anymore, its like my cellphone were to be a wifi only tablet. Before flashing this kernel I had cell service.

I did a format wipe followed by reflashing back my stock rom which brought my data network working again.

I just need a Kernel-Alucard that works for my phone and if I can get data network to continue working after flashing it then everything would be working perfectly as I was able to test an AOSP rom installed and booted as secondary and it worked perfectly.

Alternatively I am open to other kernels besides "Alucard" if it will do the job just right.