How To Use Your Android Phone As Wifi Modem?

If I bought an android phone off of Amazon, could I use it as a wifi-only smart player?

• I'm looking at either an EVO 4G, a Droid 2, or a Galaxy S. I JUST want to use it on wifi. No 4G, no 3G, no extra charges. Like an iPod Touch. I'm probably going to want to buy it new, because I don't know what I'm buying if it's used. So, I guess what I'm asking is, can you boot up the phone without using 3G, connect to wifi, and THEN sign into google?

• Answer:

  sure, but why would you want to you can use anything that dont require a voice connectiong such as phone calls if your willing to put the money into buying it why not just get a tablet that pretty much is the phone without the whole phone call thing. i no its not as small as a phone but you can find tablets that are smaller then lets say the ipad or u could get an itouch unless ur like me and hate apple, but look into it i no archos makes some small tablets this would make more sense then buying a phone