Kuala Lumpur: On Wednesday, a news report by a Telegu news channel cited fishermen spotting debris floating off the coast of Andhra that resembled pieces of an aircraft.

The debris was spotted floating at Kutta Gouduru beach in T P Gudur mandal of Nellore district in south coastal Andhra off Bay of Bengal.

The incident comes in the background of a massive search operation trying to locate a missing Malaysian Airlines planes, with 239 people on board, that went missing on March 8.

There are speculations that the plane might have taken a deliberate detour towards Indian Ocean or Bay of Bengal.

The local authorities have alerted the top officials about the unidentified debris.

In a related development, Malaysian defence ministry has said that files were 'recently' deleted from the home flight simulator assembled by the pilot of the MH370.

The investigations are trying to retrieve the deleted files.

The fact that none of the passengers- on board the missing flight MH 370- used or tried to use their cellphones have left the investigating agencies scratching their heads.

In the age of smartphones and social media, one question surrounding the disappearance of the Malaysian airline is why none of the passengers tried to contact relatives, as they did during the 9/11 attacks.

Even the absence of phone calls or emails from those on board the Airlines Boeing 777 could provide clues for investigators struggling to solve one of the greatest mysteries of modern aviation.

It may indicate that the plane was flying too high or was over water, or that the passengers were unconscious, possibly due to a change in cabin pressure.

Experts say the chances of the 239 people on board Flight 370 being able to use their mobile devices would have been better the closer they were to a mobile network on the ground.

Many are sceptical that the passengers or crew would have been able to establish and maintain a call using cellphones while travelling at speed, particularly at

cruising altitude.

For mobile phones to be used, there must be a contact between the handset and the network -- known as a "handshake". This requires a strong enough signal from

both a transmission tower and the phone.

"Theoretically, 23,000 feet (7,000 metres) and 45,000 feet are a cell range that terrestrial mobile network could work with," said Singapore-based telecommunications consultant Koh Chee Koon, referring to unconfirmed reports of changes in the plane's altitude after it lost radar contact.

But given the limited transmission power of a commercial mobile phone, as well as the barrier presented by the plane body, "for the mobile phone to connect to the mobile network with acceptable strength and quality would require some luck", added Koh.

Experts note that in the case of the September 11, 2001 attacks in the United States, the planes were flying at relatively low altitude over areas with cellphone coverage.

In any case most of the calls are believed to have been made from seatback phones and not mobile devices.

According to latest news reports, it is being believed that the mssing jet liner flew into southern Indian Ocean. The search for the missing Malaysian Airlines plane has spanned across 26 countries from Caspian Sea in the north to Western Australia in the south. The investigating agency believe that the plane flew into southern end of the corridor. The main reason behind that assumption is the lack of evidence from countries along the northern corridor. China said on Wednesday it had not yet found any sign of the aircraft crossing into its territory. On Wednesday, Bangladesh streched its effort to search the Malaysian Airlines plane that went missing on March 8. Following Bangladesh Prime Minister Sheikh Hasina's instruction, Bangladesh Navy March 14 launched the search for the missing plane by deploying two frigates -- BNS Umar Farooq and BNS Bangabandhu -- and two aircraft. "Yesterday we deployed BNS Somudro Joy instead of BNS Farooq as part of our efforts to strengthen our search operation," Xinhua quoted Bangladesh Navy spokesman Syed Moksudul Hakim as telling journalists at a press briefing Wednesday.

In the picture, a relative of a passenger onboard Malaysia Airlines flight MH370 cries at the Beijing Capital International Airport.