I want to test Agentforce Contact Center features. Is there any specific trial org that allows us to test the same?

@Ankit Vashishth The Agentforce-enabled trial or Developer Edition org didn't allow me to test Agentforce Contact Center features as it doesn't include the required permission sets. I procured a SDO using partner community and PLC and was able to setup ACC. However, if you have worked on ACC, can you help me understand how to call a SF procured toll-free US number without incurring charges?