anyone can confirm normal walk in can purchase white ip4. I went to sunway pyramid blue cube, they hv black ip4 only.

can celcom trace if whether the ip4 is jailbroken or not?
i mean after we restore it back to normal before claiming the warranty because i know jailbreaking will void the warranty..
if they can trace it somehow..
then i'll not jailbreak my brother's celcom ip4 la..not until he finished the warranty at least
so does anyone know whether they can or cannot trace it?