Who I have the same questioned this topic

I have a low usage, almost brand new quality Verizon's Samsung Note 3, which I recently upgraded for an iPhone X. Until around a month ago I was using the Note 3 without any issues whatsoever. I wanted to use the Note 3 device for my kid. When I key in the IMEI number the device shows "not compatible" for Verizon Prepaid services. Within a month or so, how did this perfectly troublefree Postpaid device become ineligible for Prepaid? Is there something I can do to get prepaid BYOP service activated using my Samsung Note 3?