Yes! Most modern phones support multiple eSIMs. However, there's a limit:
iPhone: Can store up to 5 eSIM profiles, but only 2 can be active at once
Android: Varies by device, but typically 2-5 stored profiles
You can have both Ryoko and another provider's eSIM activated simultaneously—perfect for using your main provider's calls/SMS and Ryoko for data, or for backup coverage while traveling.