Default S4 Unlock method forever??

Hello, I currently have a AT&T S4 i337 unlocked by the *#0011# method to work with Claro. I want to flash a custom rom in it but im not sure if the method is gonna stay or if I have to do it again or so.

Does that unoock method unlocks forever the device even if I flash a cutom rom, recovery or kernel???

Sent from my SAMSUNG-SGH-I337 using XDA Premium 4 mobile app
AT&T S4 I337 on ClaroPR
Rom:LiquidSmooth 2.37V
Kernel:Ktoonsez 5.1