palm top buying advice

[Guest hivez]

Hi, ive been considering getting rid of my spv phone and buying some kind of HP pocket pc, ive been searchign around ebay etc for a while now but say for example the Palm ZIRE 72 and the HP iPAQ RZ1715, does this have some kind of sim card slot? they all say how they have gprs and email applications but i dont see how they connect to the net without having a sim card slot and alot of the palms ive been looking at dont say anything about a sim card slot? anyone know anything about palm tops? cheers