I'm looking for a smartphone with a good SIP client so that I can connect to any wifi hotspot, go through my home PBX server, and from there, make free calls to landline numbers.
At this point, I zeroed in on the following smartphones:
- Nokia E63 or E71
- BlackBerry 8520 or 8900
- HTC Dream or Hero
Does someone know if any of those has a 1) solid SIP client, and 2) which doesn't drain the battery too much (I'll disable SIP when not making calls, and the let the server just send me an e-mail notification)?
If other good alternatives are available, I'm interested.