March 21 (Reuters) - REDtone Digital Berhad RTON.KL : * DISPOSED AGGREGATE OF 5.08 MILLION ORDINARY SHARES IN HEITECH PADU FOR 15.30 MILLION RGT FROM 17 OCT TO 19 MARCH Source text: ID:nKLS6Mr288 Further company coverage: HEIT.KL ((Reuters.Briefs@thomsonreuters.com;))