This is also asked as:
- Will my number work if the subscription renewal failed?
In case the subscription does not renew, it will be considered as canceled.
On cancellation, the reserved number will be unassigned, not be available to anyone. It will also stop all in and outgoing texts/calls to the reserved number.
However, you can re-subscribe and obtain the same number within 7 days from the expiration of your 2ndLine subscription. This is supported only for a monthly or a yearly subscription. And this is an automated process.