Want to use 1537's hotspot on other networks SOLVED

[sanctious]

This thread did it for me~!
EDIT: Please skip to post #3
I've been reading tons of threads here and am overwhelmed. I rely on my phone's data and hotspot at home as I don't have internet service at home.
So I would like to accomplish two things:
1. Be able to use the phone's hotspot. It's an unlocked At&t 1537 but the hotpost function still won't work on other networks
2. Delete all the crap-ware
I've been reading through a lot of threads and it seems possible, but is easier said than done. I understand that I have to flash my phone and install another ROM/Firmware.
Is there an up-to-date step by step guide on how to accomplish this?
I know all the information is spread out everywhere here in this site. But I'm nervous to try to piece them together myself and break my phone.
Any help would be massively appreciated!
To show I've put already put in some effort, I've already downloaded Odin on my computer.
Phone is currently at 4.4.2

 

[sanctious]

I've taken another crack at it and explored the rooting option and manipulating some apk and odex files in /system/app and still no luck.

 

[sanctious]

I've found this thread! It says it will enable native tethering. Woohoo! Now I just need some help breaking down the steps a bit more
http://forum.xda-developers.com/galaxy-s4-active/general/how-to-update-to-i537oc6-5-0-1-t3089355

**You can begin the following process from 4.4.x Build/ROM or higher but you must already have Root Access**

**Required** FlashFire - Play BETA - PREVIEW

**Caution!** The following process is only for the I537 AT&T S4 "Active" variant. Use on any other device may result in a hardbrick!


Download:
- I537_OC7_Stock_Rooted_ROM
- I537_OC7_Stock_Rooted_Deodexed_ROM

Pevious Builds:
- I537_OC6_Stock_Rooted_ROM
- I537_OC6_Stock_DeOdexed_ROM

Set your screen timeout setting to 10 mins before beginning!

1. Place the ROM onto your device (use either internal or ext-sdcard).
2. Open the FlashFire app and "Agree" to the Terms and Conditions.
3. Press "(+)" twice to bring up the "Actions" menu.
4. Select "Flash Zip or OTA" and locate and select the ROM. Leave "Auto-mount" unchecked under the "Options" menu and press the checkmark to continue.
5. From the main menu Uncheck all options under "EverRoot" and set "Reboot" setting to "Download."
6. Press the lightning bolt then "Ok" to begin the flash.
7. Once the flash is complete and the device reboots into "Download" mode, flash the I537_OC7_Bootloader using Odin's PDA/AP slot.

The screen will turn black then display the contents of your system before beginning the flash. FlashFire will pause for about 1 minute while flashing the "system" partition. Once complete your device will reboot and pause on the AT&T splash screen for 1 - 2 minutes (15 - 20mins for DeOdexed version) before completely rebooting. Done!

Tip: for blazing fast speed turn off animations from Developer Options and reboot!

Known Issues:
- None!

Optional - Enable Native Tethering:
- I537_OC7_TetherAddOn
- I537_OC6_TetherAddOn (Flash using FF's "Flash zip or ota" option.

Notes:
1. The above process will not affect your Knox Warranty Flag.
2. The process will update your Modem, Non-hlos, System, Kernel, and Stock Recovery.
3. No need to wipe prior to flashing! The ROM will automatically perform a factory data reset.
4. To learn more about FlashFire's capabilities on locked bootloader devices see here: http://forum.xda-developers.com/showpost.php?p=60070810&postcount=2

Credits:
@thisisapoorusernamechoice - for capturing the ota update and for his system dump.
@Chainfire

 

[sanctious]

I've put my questions in parentheses. Please answer and elaborate. Thank you thank you in advance! I'm asking these questions now in case I get caught up in the middle everything happening
Flashfire - installed on my phone
I537_OC7_Stock_Rooted_ROM - downloading

1. Place the ROM onto your device (downloading into my phone; into downloads folder)
2. Open the FlashFire app and "Agree" to the Terms and Conditions.
3. Press "(+)" twice to bring up the "Actions" menu.
4. Select "Flash Zip or OTA" and locate and select the ROM. Leave "Auto-mount" unchecked under the "Options" menu and press the checkmark to continue. (this is down in the flashfire app, right?)
5. From the main menu Uncheck all options under "EverRoot" and set "Reboot" setting to "Download." (still flashfire app?)
6. Press the lightning bolt then "Ok" to begin the flash.
7. Once the flash is complete and the device reboots into "Download" mode, flash the I537_OC7_Bootloader using Odin's PDA/AP slot. (quite lost here, I'm guessing, when the above steps are completed the phone will go into download mode, then I'll need to connect the phone to my computer and use Odin.

Tip: for blazing fast speed turn off animations from Developer Options and reboot! (when and where would I do this?)

Optional - Enable Native Tethering:
- I537_OC7_TetherAddOn (when would I do this? also in Odin?)