Can I use the povo 2.0 plan on other companies' devices or SIM-free devices?

You can use it on a POVO 2.0 plan compatible with a SIM unlocked device or a SIM-free device.
About models compatible with the POVO 2.0 plan Click here

[Please note]
eSIM is currently available There are an increasing number of mistakes that result in selecting a non-compatible device when applying. If you wish to use an eSIM, please make sure your smartphone is compatible with eSIM before proceeding.