Can I use an Android phone without an Internet access plan? I'm interested in buying an Android phone for Xmas. Currently my pick is LG Optimus One.
I will be using it without any Internet access plan, only using Wifi wherever possible.

Some questions that I have:


Can the phone be usable even if I don't have any Internet access plan, or there will be severe usability issues? (eg: features that will not work)
Do I have offline access to Google Calendar and GMail, auto-synchronizing whenever it detects Wifi connection?
Is there an option to block any attempts from apps/phone to connect to Internet through GPRS/3G (thus slashing my credit from the carrier, since I won't have an Internet plan...)?


Thanks.
YES. You will use it as a regular phone, but will be disconnected from the networks (Facebook, Twitter, IMs, Sync, etc)
YES. You can access your calendar offline. And yes, you can sync when Wi-Fi is available.
Yes, you just disable data traffic.