Can i use the G1 just as a mp3/camera/wifi device?

My friend is getting a new phone and is going to give me her T-Mobile G1. can i use it just as a mp3/camera/wifi device? without a sim card?

Yes u could still use it for music/wifi/camerA. Lucky u tho ur getting all that for free

Sciphone K599 Quad Band Dual Camera TV Cellphone With Wifi