LTTP?
From Reddit:
"You can track it without the tracking number--you need to track by "reference number," by going here:
https://www.ups.com/WebTracking/reference?loc=en_US
Use your phone number in the "reference number" field, then fill in your country and zip code. If you're on mobile, you'll have to request the desktop version. Even though what you're on already looks like the desktop version, if you don't, the site will bump you to a generic mobile tracking page when you hit "track.""
Worked for me, my phone is in Korea right now.