I just acquired an Iphone in a trade, it has no sim in it and on the screen it even says no sim installed. If I get this sim http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&ssPageName=STRK:MEWAX:IT&item=320329845741 and install it in the phone will I be able to get normal use out of it? all I really want to use it for is as an ipod and for the wifi.