Samsung will bundle the Galaxy Buds with Galaxy S10 pre-orders in Vietnam. Actually, it's a rich bundle that also includes a JBL Charge 3 (worth $150) and a Clear View Case for the phone, that's a total of VND 7,000,000 ($300/265) worth of goodies. Interestingly, the local Samsung Experience Store offers this promotion from February 11 to February 26 - it's already ongoing! Samsung is already running a pre-order promo in the Philippines too, though the gift package is a "mystery box", which may or may not contain a pair of Buds. We do know that Samsung Russia will be bundling the Buds...
Source: https://www.gsmarena.com/samsung_vietnam_confirms_free_galaxy_buds_with_galaxy_s10_preorder-news-35506.php