Now, if we can call fact the diversion to the west, the airplane surely would have been picked up by radars if it had overflown PAK/IND or other country with military air force.
Hence I believe, again, IF it flew westward, that it lies somewhere in the bay of bengal. Although the pings from the satellite seem to indicate it flew for 5h, I just can't believe no military force could have spotted it, if over their territory.