To connect to a ZeroTier virtual network as a VPN from your phone or tablet, you can use the ZeroTier One app for Android. Here's a step-by-step guide on how to do it:

1. Download and Install ZeroTier One:

   • Visit the Google Play Store on your Android device.
   • Search for "ZeroTier One" and download the app.

2. Join a ZeroTier Network:

   • Open the ZeroTier One app after installation.
   • You will be prompted to enter a Network ID. This ID is provided by the network administrator or can be found in your ZeroTier account if you are creating your own network.
   • Enter the Network ID and tap "Join Network."

3. Authorize the Connection:

   • Once you join the network, the ZeroTier service will request permission to set up a VPN connection. Grant the necessary permissions.
   • The app will then connect you to the virtual network.

4. Verify Connection:

   • After joining, you can check the status of your connection within the app. A green checkmark next to the network indicates you are successfully connected.

5. Using the Network:

   • With the VPN connection established, your device can now communicate with other devices on the same ZeroTier network as if they were on a local Ethernet network.
   • This setup allows for secure, peer-to-peer communication across different locations, ideal for remote collaboration, IoT applications, and more.

For more detailed information about ZeroTier and to explore clients for other platforms such as Linux, Macintosh, Windows, and BSD Unix, visit the official ZeroTier website at https://www.zerotier.com/. The core engine of ZeroTier is open-source and available on GitHub at https://github.com/zerotier/ZeroTierOne.

If you encounter any issues or bugs while using ZeroTier, you can seek help and report problems on the ZeroTier discussion forum at https://discuss.zerotier.com.

ZeroTier's virtual networks provide a faster alternative to traditional VPNs, enabling seamless connectivity for hybrid or multi-site cloud environments, distributed teams, and IoT devices by offering direct end-to-end communication.