Originally Posted by
aircommodore
As expected it did't work. The only exception is the case apparently when your original flight is overbooked in which case agents receive a message authorizing them to ask passengers if they are willing to take an earlier flight.
It is perhaps necessary to make a distinction between transfer and other flights. If you check in at IST for a flight, there is approximately 0% chance of changing your flight unless the booking conditions allow this, you pay a penalty or you have 'connections'.