I have a few global premier upgrades left that I would like to use up for this year. I call UA and told the agent I wanted a fare that I can upgrade on a flight to NRT. I was told by agent that W is the upgradable fare class. After booking my flight, she said she was going to apply the upgrades. After about 30 minutes on hold, we got disconnected. I called back ask to have my GP upgrades applied. Since my flight connects via IAH (I did it for the extra miles), it looks like only first leg is upgraded. The rest is wait listed. Two questions: 1) Will my GP upgrade be wasted if I don't get the upgrade to NRT or can it be converted to normal RP upgrade? 2) How do I figure out what my chances are for the upgrade? 3) I remember a few people saying they got their upgraded forced. How would I go about getting that?