"It all Starts with S" is a "fun and creative" new competition of crafting sentences that begins and ends with the letter S and posting them to the OnePlus Community website. One can win prizes by doing so - the 13s included.
The global edition of the 13T (a 6.32-inch display smartphone now available in China that packs the same Snapdragon 8 Elite processor as the brand's flagship 13 along with an even larger battery) is currently destined for release in India.
Now, it looks like it might debut elsewhere after that, thanks to the brand's new giveaway. The "only way to win a OnePlus 13s for FREE!" is apparently open to entrants from other countries, as indicated by a footnote that specifies "your chance to experience it ahead of the world".
Accordingly, it looks like the 13s might join its bigger sibling on Amazon in regions that might include Europe as well as India in 2025 - although the same happening in North America is less certain at the time of writing.