Hello all, I booked my first explorer award LAX-NRT/HND-ITM/KIX-GMP/ICN-HKG-CGK-KUL-DPS-KUL-BKK-AMM-TLV-MUC-DUS [19,772 miles -130K - all business except HND-ITM, TLV-MUC and MUC-DUS] starting April 30, ending August 19 for someone I know. As many of her dates are guesses, my question is how easy is it to change flights [presumably by calling AA] assuming there saver business or economy availability [I know same airline and routing]. Does anyone know whether AA picks up the callers account info by phone number when they use VOIP apps like LINE, VIBER or SKYPE? Also, if a business saver award opens up, can the passenger then change from coach to business on the same carrier/routing? Just trying to prepare for the calls [from overseas] to change dates etc. Thank you in advance for any comments. I am also glad to share anything about my experience and research.