Ask Slashdot: Data-Only Phone, Voice Over WiFi? 208
enFi writes "I want to pay one ISP (only!) for data (only!), and use it for my smartphone and my computer; and until they catch up, I want not to inconvenience the rest of the world — still let them call a phone number. (We all want this, right?) I'm most of the way there: my plan is to get a Clear Spot (their 4G WiMAX coverage is good for me) to use with my unlocked Nexus S (which will only ever use WiFi). I could just use Skype and an Online Number, but talk of Sipdroid+pbxes.org+GV and the recent Google Voice / SIP article make me think I'm only starting to untangle the mess of services and options. Is there a good (not to mention best) way to do this?"
N900 / Asterisk / Vitelity (Score:5, Interesting)
My set-up is my N900 using UMTS (or WiFi if I'm at home) connecting to my Asterisk box which handles call routing and voicemail, and which connects to the plain-old-telephone-system via Vitelity. Alternatively, you could skip running your own Asterisk server and just connect to Vitelity directly (or run Asterisk on the N900).
I believe Android's Gingerbread release also supports SIP, but I don't have direct experience with that. Either way, I use SIP over 3G and WiFi quite a bit since it's significantly cheaper than when I'm on the mobile voice network.