Real-time voice or video communication between users on mobile devices or computers
I am afraid it is not but you don't need a subscription to use Teams for home. The free version of Teams for home gives you:
- Free 1:1 calls between Teams users for up to 30 hours.
- Free group calls and meetings for up to 60 minutes.
- Up to 100 participants per meeting.
- 5 GB of cloud storage per user.
- Chat with friends, family and contacts in quick and easy conversations.
- Communities for more collaboration in your groups and engagement with your audience.
- File sharing, tasks, and polling.
- Data encryption for meetings, chats, calls, and files.