Unfortunately no. It's crucial to maintain an active subscription to retain your 2nd Phone Number. Here's why:

1. Number-Subscription Link: Your 2nd Phone Number is tethered to your active subscription. If the subscription is canceled or interrupted, this link is severed, rendering the number available for reassignment.

2. Continuous Subscription: Your 2nd Phone Number remains reserved for you as long as your subscription stays active and uninterrupted.

Important Note: If retaining the same number is imperative to you, ensure your subscription remains active and uninterrupted.

Bonus Tip: Consider setting a reminder before your billing cycle to prevent accidental subscription lapses, which could result in losing your preferred number.