I bought my Galaxy S7 phone and Galaxy 46 mm watch in AU ebay and found out everything is working except SPay on the watch. My phone Spay is working in AU but no SPay app on my watch. Checked my Phone and it is built in UAE. Went to flush the ROM on my phone for AU region but my S7 is a dual SIM and there is no AU ROM for my phone on your link. Then I ended up at this site: https://forum.xda-developers.com/smartwatch/galaxy-watch/how-to-install-spay-watch-outside-t3898020 and found the solution. My watch came from different region too! There are 3 letter codes showing this but you have to access the watch through WiFi and PC to see this and change it. I found out my watch had a TTT region code (Trinidad and Tobago)!?! You never know where the stuff comes from when you buy from e-Bay even when it is a local seller So following the instructions on the link I managed to change the code to my watch to AUT. After this watch reset itself and guess what! SPay installed when I pressed the back button long. Software updated and I had to set the card again from scratch - but it WORKS! Lucky before I changed the region I backed up my watch to Samasung cloud so I got all my settings and faces back after the restore. Also I found ANZ Visa debit card works but Virgin VIsa Credit not supported by SPay. Hope this will help.
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