WorldWideTech & Science. Francisco De Jesús.
According to GSA these are the companies that have already commercially launched LTE systems by continent and country:
USA: Metro PCS and Verizon.
Austria: A1 Telekom
Findland: Elisa and Telia Sonera.
Norway: Telia Sonera.
Poland: Mobiland & Centernet.
Sweden: Tele2, Telenor and Telia Sonera.
Uzbekistan: MTS and Ucell.
Asia Pacific & Oceanía.
Hong Kong SAR: CSR Limited.
Japan: NTT Docomo.
However on the picture below you can see a complete list by continent and country of the carriers who are on trials and commitments for a total to March 24, 2011 of 140 LTE network operators commitments in 56 countries.