Can I use my old iPhone as an iPhone touch?

[iMore Question]

Use old iPhone as an iPhone touch

I am upgrading my iPhone 4 to a new model but still want to retain the old 4 as an iPod Touch( e.g. do without the sim and all cellular services)-how to I stop the on screen notification advising me to install SIM?

 

[El_NiNo]

Re: Use old iPhone as an iPhone touch

You can't you can try inserting an old sim dat you don't use