I would

I've had good luck using my upgrades with no problems. Let us know how it turns out! Use Skype, calls to/from TW is pretty cheap... thats what my g/f uses
Originally Posted by
MattTaiwan
I have a upcoming trip to United States and trying to use my 4 Diamond suite upgrade e-certificate.
Contacted GP service center in Hong Kong, checked with CSE of following stay:
Sep.30 - Oct.04 Grand Hyatt New York
Oct.04 - Oct.06 Boston Hyatt properties
Oct.06 - Oct.08 Hyatt Regency San Francisco / Grand Hyatt San Francisco / Hyatt at Fisherman's Wharf
Both of three Hyatt and 4 nights in New York, be informed that there's NO any Diamond suite upgrade available from Sep.30 to Oct. 08 in any Hyatt properties in New York & San Francisco.
Should I make a international call to contatc the Diamond line to check again? maybe Hong Kong GP service center just provide a wrong information?