Unlocked iPhone imei

I have an unlocked iPhone from the Apple Store.
So I'm visiting Mexico for a few days and I bought a Mexican SIM card so I can use my phone in Mexico.
The carrier (Telcel) ask me for my iPhone's IMEI.
My question is:
The have my IMEI, will that affect the unlocked iPhone?
I mean, I'll be able to still using it in my country?
I normally use Rogers (Canada).


The Mexican carrier cannot lock your phone if that is your question. I'm guessing they want this as part of the activation of the SIM.