Tushar Mehta / Android AuthorityTL;DR OnePlus has opened the first global ColorOS closed beta for the OnePlus 15 and 15R. OnePlus has officially begun its transition from OxygenOS to ColorOS, opening the first global Closed Beta Testing (CBT) program for the OnePlus 15 and OnePlus 15R. While both the OnePlus 15 and OnePlus 15R are available in the US, the inaugural ColorOS beta is currently reserved exclusively for Indian variants of the two phones. For now, OnePlus is accepting 300 testers each for the OnePlus 15 and OnePlus 15R. That said, OnePlus hasn’t announced plans to open the ColorOS beta to US devices, nor has it provided a timeline for a wider rollout.