FRANKFURT (Reuters) - Germany's telecoms and energy regulator will allow Deutsche Telekom (>> Deutsche Telekom AG), Telefonica Deutschland (>> Telefonica Deutschland Holding AG) and Vodafone Deutschland (>> Vodafone Group plc) to take part in the upcoming spectrum auction, a Federal Network Agency's spokesman said on Wednesday.

The German government in January kicked off the process, which is scheduled to start on May 27 and could according to analyst's estimates deliver the German government about 4.5 billion euros (£3.22 billion) in proceeds.

(Reporting by Peter Maushagen; Writing by Kirsti Knolle; Editing by Maria Sheahan)