[Galaxy Note 3 General] TheTAMAS:
Detailed Steps that I followed

So, few people are facing an issue due to which they aren't able to get the Modem to update to N9005XXUGNG1 from whatever version they actually were on before upgrading to the latest firmware.

I am gonna mention here the steps that I followed, in a manner as precise as I can enlist..

I'll also gonna try to do so in a manner that's as elaborate as I can make it.. Therefore, some steps might seem obvious and/or extra :p

If you still find yourself in any doubt-do let me know..

Strong Personal Advice -

Please read the steps twice before you actually start following them

Requirements

Enable hidden Developer Options & from inside Developer Options, activate USB Debugging Mode (follow these steps-https://www.youtube.com/watch?v=FLUCy2PJZAM)

Install latest Samsung USB Driver for Mobile Phones (current latest can be downloaded from here-http://xdaforums.com/showpost.php?p=50254850&postcount=1)

Download and extract N9005XXUEND3_BTU (download from here-http://samsung-updates.com/details/27446/Galaxy_Note_3_Snapdragon/SM-N9005/BTU/N9005XXUEND3.html)

Download and extract N9005XXUGNG1_BTU (download from here-http://samsung-updates.com/details/32098/Galaxy_Note_3_Snapdragon/SM-N9005/BTU/N9005XXUGNG1.html)

Download the archive from the attachment & extract it. It contains a pit file, Odin v3.09, SuperSU v2.01 (so you won't need to visit Play Store when your phone would be lagging after downgrading) & Towel Root (so you won't need to visit TowelRoot website when your phone would be lagging after downgrading)

You'll also need Mobile ODIN Pro which can be bought from here-https://play.google.com/store/apps/details?id=eu.chainfire.mobileodin.pro&hl=en_GB

Back up your data & ensure that your phone is charged 80% or more

Downgrade to N9005XXUEND3_BTU

Use Odin v3.09 & flash your phone with the N9005XXUEND3_BTU tar.md5 file

make sure that before you hit the Start button, it matches this snapshot-

[IMG="the actual name & path of files will differ, just ensure that the same options are Tick Marked/Without Tick Mark"]https://lh3.googleusercontent.com/-ZJ6xc-EPPhQ/U--_Yeb9q0I/AAAAAAAAE3I/lraKfQqG8tw/w885-h650-no/Steps-Update_Snapshot.JPG[/IMG]

the actual name & path of files will differ, just ensure that the same options are Tick Marked/Without Tick Mark

Your device would end up with a Boot Loop, pull out the battery & pop it in again

Enter Recovery Mode by pressing & holding together the Volume Up, Home and Power buttons, all at the same time

wipe data/factory reset, watch the video here-https://www.youtube.com/watch?v=iy_hi2gSbBc

Similarly, wipe cache partition & reboot the device from the same menu

Your device should still have a Boot Loop (mine did)

Reflash your phone with the N9005XXUEND3_BTU tar.md5 file but this time, use the pit file that I provided in the attachments

make sure that before you hit the Start button, it matches this snapshot-

[IMG="the actual name & path of files will differ, just ensure that the same options are Tick Marked/Without Tick Mark"]https://lh3.googleusercontent.com/-xzeyWpe6iew/U-_Iw0R91tI/AAAAAAAAE3c/_lcp5x_xu3U/w885-h650-no/Steps-Update%2B%28PIT%29_Snapshot.JPG[/IMG]

the actual name & path of files will differ, just ensure that the same options are Tick Marked/Without Tick Mark

Let the device boot normally, a seeming Boot Loop might be encountered (I encountered it), don't worry, let it Boot Loop several times, finally, it'll Start

It'll lag (mine lagged badly :eek: ), will not have any Network signal/IMEI

Don't panic & be patient with your phone, you might need to pull out the battery if it goes totally unresponsive (mine did), but it'll manage to get the work done after some time, it'll be better with the operations

Connect it to the same PC as before (if you removed it after flashing it)

Copy the extracted tar.md5 from N9005XXUGNG1_BTU archive, SuperSU.apk & TowelRoot.apk into the phone's internal memory

Install TowelRoot.apk & Root using the app (reboot won't be required-I didn't need to)

Install SuperSU v2.01.apk & let it update SU binaries

Tick on Enable Pro in SuperSU

Tick on Survival Mode in SuperSU

Restart your phone now

Upgrade to N9005XXUGNG1_BTU

Download Mobile ODIN Pro & run it (grant it Root access)

In Mobile ODIN Pro, use the Open file option & choose the extracted tar.md5 from N9005XXUGNG1_BTU archive (it should be in the Internal SD-card if you've followed the steps precisely

choose Enable Ever Root

choose Inject Superuser

choose Wipe data and cache

choose Wipe Dalvik cache

Tap on the Flash Firmware option & then tap on Continue to go ahead with the flashing process

You might wanna plug in your phone's AC charger to avoid any power shortage during this critical phase

Phewwwww..... :victory:

Your phone should now have

the Latest Stock Firmware, Rooted,

KNOX 0x0 & latest Modem :fingers-crossed: (

Mine did

:laugh: )