Default Question about updating my i337m 4.3 and TWRP

Hi, I've been reading all the morning all this sort of things about the I337M canadian and the issues with data drops, modems, base band models safestrap, using the golden eye rom

i live in mexico and my phone model, from the box is this one: SGH-I337M base band I337MVLUAMDJ, and i already rooted it and installed the latest TWRP

can i install this rom without any issues with data drops, or do i need some kind of update first?

http://forum.xda-developers.com/show....php?t=2313469

--------UPDATE- ----
I spend all day updating my phone as you can see on my attached picture (its already roted) Now i need a custom recovery, rigth?
the problem is, i installed the latest TWRP using odin and every time i tried to go into recovery i have this message:

"RECOVERY BOOTING...
RECOVERY IS NOT SEANDROID ENFORCING
Set Warranty Bit: recovery"

After that, i flashed again my phone with odin, root it again, and now, i can enter in the normal safe recovery menu.

Can someone help me to install TWRP (or any other custom recovery) on my 4.3 phone? or tell me if I'm doing something wrong please =/
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