(Sorry if this has been posted before)
In the
New Straits Times, an anonymous 777 pilot was quoted saying he had radio contact with MH730 on 121.5 MHz at 01:30LT (17:30Z), 8 mins after loss of radar contact. The NST report says that the pilot was over Vietnam, 30 mins ahead of MH730 with destination Narita, Japan. Data from Flightradar24 suggests that this flight in contact with MH730 may have been
MH88.
MH88 on Flightradar24
The MH88 pilot said to NST that he was sure he was talking to the co-pilot of MH370.