Yes, while you can't with an ipad it looks like you can with a galaxy tab. Vodafone will be selling the tab on a contact, and with the device set to be cheaper than a normal galaxy s that means it could possibly be free.
Though it's certainly not going to be the most portable phone though you can change your sim from the tab to another phone. And of course use hands free kit
I'll just use the internet hotspot feature on my galaxy s to access the internet on the tab. It needs three things for me to be interested in one
1. Battery life has to be at least 8 hours of video payback.
2. It has to have a super amoled screen at 1024x600 res.
3. It must weigh less than 400g and it really should be cheaper than an ipad.
September the 2nd. We'll find out.