Kuwait based GSM/3G operator ZAIN, close to 40 million users with presence in 8 countries, Kuwait, Jordan, Sudan, Saudi Arabia, Lebanon, Iraq, Bahrain and Morocco, selected Azetti Networks OMA/Nokia PoC system together with XDMS after field trials. Corporate sector product and service Push-to-Talk is utilizing Packet Core Data networks when delivering VoIP based group calls utilizing standard GSM/3G handsets which have PoC client included. Market situation is very interesting due to the existing and past iDEN operations, which has made Push-to-Talk services well known on the Middle East market.