sip

People Centric Phone UI
[13:02:55] matt [wronka.org]/Psi+ An article from 2013, suggesting people-centric phone UI:
http://tantek.com/2013/338/b1/people-focused-mobile-communication-experience

This seems so incredibly obvious, that only after seeing the iOS screenshots did I realize that Apple doesn't (hasn't?) had this feature. I've had groups or individuals on my S60 phone for years, and Maemo (~2011) had you select a person, and then a protocol for communication (POTS, SMS, XMPP, AIM, IRC, Skype,etc.). The Maemo implementation sounds exactly like what's suggested, where you can select the person, and for protocols with status (SIP, XMPP, etc.) see if the person is online, and send a message. Or send an eMail instead.

IPv6 on Mobile
[03:40:59] matt [wronka.org]/Psi.generay T-Mobile supports native IPv6; I played around with it a bit on my N900 during their open beta phase. It's now mainstream, and rolled into their standard APN which anybody who's signed-up for an account in the last six years or so would probably be on (apparently some of my phones are still on the old Voicestream APNs which have at least recently still worked). According to them, only certain Android phones still work (half of them are Nexus brands). All recent Nokia phones (S40, Symbian) dating about at least five years should work fine too, the S40 phone I had has an option for it but I seem to recall it didn't work during the beta phase, and Nokia didn't want to support it.

Nokia Belle (S60) on the other hand was as easy as selecting "Advanced Options" from the network definition (when not connected) and changing the type from "IPv4" to "IPv6"; everything works from that point on. Well, except the native SIP client which wouldn't connect anymore (to my IPv4 server) and my J2ME Jabber client which wouldn't connect to (or resolve, I'm not sure which) the server. All synchronization, Opera Mobile, and in-built eMail worked fine; but the SIP client is a deal breaker.