The Boeing 777-300ER plane, which was scheduled to take off for Istanbul at 6.50 am, left for its destination at around 11.30 am, sources said.
"Turkish Airlines' Bombay-Istanbul flight (TK721, Boeing 777-300ER Aircraft, carrying 332 passengers) has returned to parking area in Mumbai after push-back due to an unidentified cell phone found onboard," Turkish Airlines senior vice president for media relations Ali Genc said in a statement.
He said the plane continued its flight to Istanbul after necessary security checks were carried out.
The aircraft was brought back to the bay after a mobile phone was found on one of the seats and all the passengers were deplaned for a thorough frisking.
“Turkish Airlines flight to Istanbul was called back from the runway at Mumbai airport after a suspicious object was found in the aircraft,” a MumbaiAirport spokesperson had said earlier.