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BRIEF-MediaTek's Unit Nephos Cayman To Buy Back 6.82 Pct Stake In Nephos (Hefei)

March 8 (Reuters) - MediaTek Inc:

* SAYS UNIT NEPHOS CAYMAN AGREES TO BUY BACK 6.82 PERCENT STAKE IN NEPHOS (HEFEI) FOR UP TO $18 MILLION FROM HEFEI GAOXIN DEVELOPMENT & INVESTMENT Source text for Eikon: Further company coverage: (Reporting by Hong Kong newsroom)