Do I permanently own my Dingtone phone numbers?

No. Dingtone phone numbers are the property of Dingtone, Inc. We lease them to you with certain conditions and we reserve the right to revoke your number if those conditions aren’t met.
Dingtone phone numbers are expensive and limited so we assign them to serious users only.
You must use your Dingtone phone number at least once per month to keep it active. It doesn’t matter how you use it – make/receive calls or send/receive texts – as long as you use it.
Inactive phone numbers will be reassigned to other Dingtone users without notification or refund.