I upgraded from 650 to 755 yesterday. I had long used verichat then when that was not supported I switched to IM+. There is an IM tool on the 755 but I can only get AOL to work, MSN and Yahoo do not work. I called sprint and they say they do not support it. Does anyone have any suggestions.? Should I put IM+ back on? Do they have an application yet for the 755.

I have used AOL, MSN and Yahoo on mine without issues. Just plugged in my email address and password and it did the rest.

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Hi All, I use Gizmoproject for Treo, which is free software and lets you IM with AIM and MSN instant messaging buddies. Also signing up gets you free computer to computer SIP calls (with out the Skype proprietary standard).
Gizmoproject works on my Treo 755P for IM'ing and from my computer for IM'ing or phone calling. and the computer to landline or cellphone rates are cheap.

here is the direct link Gizmo – A free phone for your computer - Learn More Overview

And it a true multiprotocol IM client on the Treo, It lets you import your buddy lists on Gizmo, AIM, MSN, Yahoo, iChat, and Jabber* (Jabber is the protocol that Gmail chat uses).