On Feb. 1992 in Malaga ITU-R World Radio Conference identifies IMT2000 frequency bands...
On Jan. 1998 in Paris ETSI selects W-CDMA for paired (FDD) and TD-CDMA for unpaired (TDD) UMTS-operation...
On Apr. 1999 in Toronto OHG recognises both UMTS FDD and TDD as two of the three harmonized modes of a global third generation mobile radio standard...
On Dec. 1999 in Nice 3GPP approves UMTS Release '99 specifications both for FDD and TDD...

Then what is UMTS? It stands for Universal Mobile Telecommunications System and is so called 3rd generation mobile system which comes to expand existing mobile communication with much more greater data rate which in theory is even 2 MB/s. This gives possibility to transfer video streams and voice at same time and thus makes even mobile-voice-phone's to be true.

On Internet:
UMTS Forum:www.umts-forum.org

3GPP:www.3gpp.org

GSM MoU:www.gsmworld.com

ITU-T:www.itu.int

WAP forum:www.wapforum.org

ETSI:www.etsi.org