Talking Technologies has released a SIP and h.323 compatible client for the PocketPC 2003 platform.
I still think until the manufacturers upgrade the mics on those devices, it will be garbage in, garbage out no matter how much is added to the software.
Any ideas where to download the client? There’s always only the press release, referring the their homepage or an associated (?) site for call service to PSTN (ebiv.com). Good to know that the client is free, if it just would be available…