The advantages of buying from Verizon:
* They may enable wifi-calling, VoLTE, and HD Voice.
* You can buy a full-coverage insurance plan
The disadvantages of BYOD
* They may not enable wifi-calling, VoLTE, and HD Voice.
* They may not push any updates.
Case in point... The Blackberry Priv.
* They have not enabled wifi calling, VoLTE, or HD Voice on either approach.
* They have not pushed any updates since the April patches they pushed in June. These include 317 security patches (including many that NIST has listed as level 5 or higher). The patches also include moving from Lollipop to Marshmallow. There were also patches to resolve overheating and other critical issues. If you had a BYOD from the Blackberry shop then you have all the patches. BTW, patches stopped 4 months after introducing the Priv on the Verizon network, that's just unethical.
I will NEVER buy through Verizon again. In fact, their answers to why they stopped sending patches were all over the map:
* You have the latest patches.
* Blackberry doesn't have any monthly patches.
* Blackberry never sent us the patches.
* There was a problem in the patches so we rejected them.
* We're about to release them "soon".
* Since your phone makes calls and texts we don't need to send you patches.