How to make old iPhone say iPod in top left corner instead of no SIM?

I have an old iPhone and I wanna turn it into an iPod. Anyway to change the "no SIM" text into iPod on the top left corner. I know you can do this with jailbreak but I don't want to. Maybe there's an option like this in settings but I dunno. Can anyone halp meh?

You, have to jailbreak it its the only way

Nope. None. Its a phone & that's where the carrier name goes. Can't change that.

Http://iphone.pandaapp.com/news/01042013/How_to_Change_the_Carrier_Logo_Without_Jailbreaking_on_Windows.shtml
this is a tutorial to change carrier icon of iphone, but you should have your iphone jailbroken already