According to Flightradar24, the timeline for Dubai Airlines flight FZ1073 is as follows (all times are Beijing time):
11:05 – Departure from Dubai International Airport
13:31 – Issued emergency code 7700
13:38 – Switched to hijacking code 7500
14:11 – Aircraft left the coverage area of Flightradar24 ground receiving station
14:28 – Received transponder code 7700 via satellite
14:58 – Received last signal via satellite, location showed as near Tabuk Regional Airport, Saudi Arabia