RPT-LetterOne says can**t proceed with proposed Oi/Tim tie-up
 

RPT-LetterOne says can**t proceed with proposed Oi/Tim tie-up
MOSCOW, Feb 25 (Reuters) - London-based investment firm LetterOne, controlled by Russian billionaire Mikhail Fridman, said it could **t proceed with its plan to facilitate a proposed merger between Brazilian telecoms groups Oi SA and TIM Participaçes SA.