I tried following things once I installed this ROM with all provided MODs.
1) Since I was still on NC (?!!) after installing this ROM and after 2 hrs to settle the ROM, I rebooted the phone in download mode. Connected to Odin and Flashed the Odin file downloaded from
https://www.androidfilehost.com/?fid=95916177934549159 in BL slot.
Reboot the phone, but again the baseband stayed in NC2. No OC1 updates found. Also there was no SafeStrap available. I wonder if it has anything to do with the Locked Bootloader on AT$T SM-900A ?
2) Discarting step 1, I reinstalled everything from scratch, NC2 Stock - > Root it and SafeStrap -> Installing mrram ROM. Again on fresh install, after the ROM settled and rebooted couple of times for couple of hrs, the baseband still was showing 'NC2'. I installed NC2 flasher and run it which should have flashed NC2 with SS Recovery.
Phone rebooted and started in SafeStrap recovery. But if I choose to reboot, the phone got stuck in Bootloops.
If Power down the phone and power up again, it shows the initial SafeStrap screen, then if I choose to go to recovery, it starts recovery. But if I let the phone go to boot the ROM OR select 'Continue' on initial SafeStrap screen, the Phone again gets stuck in bootloops.
I tried flashing the Stock Partitions md5 as well but still it did not solve the issue.
So I am still not able to install SafeStrap on this ROM, by any method.
Also it would be great if someone can help with the Unstable Carrier Data issue. Carrier data keeps switching to H++, 3G every 2 seconds and does not connect to 4G LTE at all. Do I need to update any MODEM using Odin?