[Samsung Gear S3] NevilleDNZ:
Clearing the cached Uber-Watch-App Uber-User-ID and your "Favorite Destination"

re: get past the 'Empty' screen.

I tried all of what you suggest and have some additional comments below that may hint at a quicker fix...

I suspect the problem I had was compounded by me having TWO Uber logins, AND trying to use a debit card from the watch. (Ironically the Debit card work fine on the regular Uber Phone App)

A) I did set English (United States) ... but suspect this doesn't help.

B) Turn off the blue tooth connection to the Gear S3 watch and Uber Watch app. (This simply proves the problem lies on the Uber Companion App)

C) As at 1) On your phone, go Settings > Apps and find Uber Companion app. Clear cache and Clear data AND TERMINATE the "Uber Companion App"

¢ [This appears to be where the "favourite destinations" are stored... ¢

D) ALSO: go into your PhoneBrowser (I used Firefox) and clear any saved Uber UserID/Passwords (I was worried that Uber was auto filling these fields)

E) ALSO: go into your PhoneBrowser (I used Firefox) and clear any saved Uber Cookies. (These appears to be where you Uber UserID and oauth's client_id is stored and needs to be reset.

F) Run the Uber Companion App, you should not get the Uber Auth web page asking you for an email address and password ¢ Previously I was not getting this!! (And I could not figure out how Uber even got my name right (Turns out it was in a Cookie with the oauth's client_id ¢

G) Add your Uber email address and password etc

H) Add your "Favorite destination" I added WORK ... ¢ I suspect this goes into the Uber Companion App cache ¢

I) Enable Blue tooth connection,

J) Start your Uber Watch App.... ¢ Set pick up, at this point I NOW got past the "EMPTY" selection, and had a choice of UberX, UberComfort, UberXL + Assist" ¢

K) Select where you want to go to (I selected WORK)

L) At this point I got "The rider's payment method is invalid and they must update their billing info"... Turns out I only had a Debit Card, so I added a Credit Card for the Uber Rider Web Page. StackOverFlow hints can be found here, cf. questions/47546948/uber-api-error-the-riders-payment-method-is-invalid-and-they-must-update-thei

M) Select (AGAIN) where you want to go to (I selected WORK)... and my watch said "Your Uber is on the way. Aamer is on the way..."

L) I quickly went BACK to the Uber Riger (already opened) web page, and clicked "Cancel Trip" ¢ giving Aamer a nice little tip for not doing anything.

M) I'm smiling..... but wait... there is more...

N) Now I test to see if the UberWatchApp works without the UberPhone Companion App. I then turn my phone OFF.

O) I turn BlueTooth off on the Watch, and turn the Watch's Wifi on to my local Wifi.

P) I then repeat steps from ... Start your Uber Watch App.... ¢ Set pick up, at this point I NOW got past the "EMPTY" selection, and had a choice of UberX, UberComfort, UberXL + Assist" ¢

Q) Yes, it worked. the UberWatch App ordered me an Uber, even with the Phone being turned off ¢ Simulating a flat battery maybe :) ¢ but you needs WiFi.

R) So... UberWatch App works over Wifi... I could not try ordering Uber via 3G/LTE/UTMS as the idiot Telcos here in Australia don't fully support eSIM [aka. embedded universal integrated circuit card (eUICC) ] ¢ but that is a whole other saga ¢

ZZ) But now my Samsung Gear S3 Watch can order an Uber.