2 places ranked

Working from
baan lamai

Ranked by the broadband measured at each address, worst-metric first, so the ones you can take a call from are at the top.

2 of the 2 listed here are call-ready.

Ranked

Hotel	#	Verdict	Down	Up	Ping	Tests
Lamai BayView Resort	1	Call-ready	305.2	243.2	11	28
Renaissance Koh Samui Resort & Spa	2	Call-ready	272.4	290.3	16	18

Upload is emphasised because it decides whether your video call holds, and it is the column no hotel will tell you.