When you upgrade a Voice AI agent from V1 to V2, every phone number attached to it will be automatically removed. You’ll need to reattach the number.

If multiple agents share the same phone number and any of them are still using V1, you’ll need to do some extra cleanup before reattaching it.

If you don’t upgrade your agents manually, they’ll be automatically upgraded to V2 in early May, 2025.

Summary

If only one agent is using this phone number, just migrate the agent to V2 and reattach the phone number.
If multiple agents share the same number, detach it from all agents, upgrade them to Version 2.0 and then reattach the number.

Step-by-step instructions

Scenario 1: only one agent using this phone number

1In Agents, select the agent you want to upgrade.

2Go to the Configure tab on the left-hand sidebar.

3Under Voice Engine, select Version 2.0. The number will detach automatically.

4Go to the Deployment tab.

5Reattach the number.

Scenario 2: number attached to multiple agents (all on V1)

1In Agents, select the agent you want to upgrade to V2.

2Go to the Configure tab on the left-hand sidebar.

3Under Voice Engine, select Version 2.0. The number will detach automatically.

4Repeat steps 1-3 for every agent using this phone number, even inactive ones.

5Once you’re done, go to the profile of each agent you want to be using this phone number. Go to the Deployment tab on the left-hand sidebar and reattach the phone number.

Make sure there are no V1 agents that are still using this phone number. Otherwise, you won’t be able to attach it to your upgraded V2 agents.

Troubleshooting

If you can’t reattach the number, make sure you detached it from all agents before switching.
You won’t be able to reattach a phone number to a Version 2.0 agent if there is a V1 agent still using this number.

Need help?

We’ve got your back. If anything feels off or you’re stuck, reach out to our support team.