I Asked myself what is IMPS

Answer was in WIKI asusual :)

IMPS
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For the mythological beings, see Imp.
For Star Wars fan film, see IMPS The Relentless.
IMPS stands for Instant Messaging and Presence Service. It is an OMA enabler for Instant Messaging and Presence. The Wireless Village consortium developed the first cut of the specifications. After Wireless Village was merged with OMA, its specs became OMA IMPS 1.0 specifications. IMPS is widely deployed but not necessarily marketed. Interworking between several operators IMPS platforms is being performed under a GSMA initiave that encourages interworking and deployment of Instant Messaging.
Vanilla terminals often have IMPS clients.
On Nokia, the chat client is accessed via the "My Presence" menu.
On Sony Ericsson, it's called "’My Friends".
On Motorola, it's called "IM". The phones' chat clients are generally designed to be provider neutral, so you have to put in the Wireless Village server settings.
If your phone doesn't have an inbuilt chat client, you might still be able to get a third-party chat application that runs on your phone's Symbian, Java ME, BREW, or other application environment. You need to get a chat client which is "Wireless Village compliant presence-enabled".
Note that it is still necessary for the operator to provide the IM service and/or one will have to connect to a third party server for connection with others for IM'ing

[edit] Compatible terminals
This is only a partial list. Many phones sold today support IMPS, especially phones from these manufacturers.
Nokia 3220, 6020, 6021, 6220, 6230, 6230i, 6630, 6820, 5140, 6810, 7200, 7260, 7270, 7610, 8800, E50, E60, E61, E62, E65, E70, N70, N72
Motorola V500, V600, E398, V3
Sony Ericsson K310, J300i, F500i, K300i, K310i, K500i, K510i, K600i, K610i, K700i, K750i, K790i, K800i, S700i, T206, T630, T637, V800, W550i, W800i, W810i, W850i, W900i, Z500A, Z800, Z1010
Siemens CX70, CX75, M65, SK65, S75
BenQ-Siemens S68