Can I activate my unlocked iPhone 5 with another nano sim?

I bought my dad an unlocked iPhone 5, but he still didn't receive his nano sim. In order for him to use the phone, he needs a nano sim card. Can I simply put my nano sim card from my own iPhone 5, activate the iPhone and then remove it and place his own nano sim when he receives it in the mail?

Thanks for your help.

Added (1). It's not Jailbroke, but it's unlocked, so I can use it with any providers.

Yes but you need to unlock it first "jailbreak"