Originally Posted by windraver
Neither. Success is not based on the contract but on the prepaid device you are trying to activate. By act of some system we have no insight into, a prepaid device, in this example, a Verizon moto g, is either allowed to access the activation number or is not allowed to access the activation number. Upon the success of connecting to an activation number, regardless of whether the postpaid line you activate on is in contract, off contract, etc, you can activate the device as a replacement phone. The point of failure/success is dependent on the device's ability to connect to Verizon's activation number.
Essentially the same answer but more explanation. Does that answer your question?
Look, here is the deal. I've been a Verizon customer for the last 4 years. Started out post-paid, decided I didn't like paying $120 a month with overage charges, the minute the 2 year contract was up I called Verizon and switched my phone (a rooted postpaid Droid X) to prepaid. Dropped the cost to $70 a month. Finally decided I needed a new phone a month ago, walked into the Verizon store bought a Moto G in a prepaid box. Walked out and discovered it wouldn't tether, logged into MyVerizon and switched it to the 'newer' prepaid accounts that are even cheaper. Your not supposed to be able to do that on a new Prepaid phone until you have owned it a year - Verizon didn't care, they let me. Now, 2 weeks later I'm getting texts and calls from Verizon saying I'm such a good customer of theirs I can switch my phone to Postpaid if I want.
Verizon isn't run by complete dumasses. They have every last MEID of every phone they ever sold in their CDMA database. If you have been with them a long time - and aren't buying a brand-new carrier subsidized phone from the moment your contract allows it - they don't give a tinker's damn whether you bought the phone as prepaid or postpaid - they will activate it on whatever you want. Just call customer service.