Totally confused about potential phone return
My current phone is an iPhone 6s I got from Xfinity Mobile in February, 2018. It is the first smartphone I've had, and I've been happy with the phone and Xfinity Mobile.
I recently saw a deal on your website on the SE (2020), so I ordered that to use on my existing line, i.e. as a replacement for the 6s (which I am *not* trading in or selling).
What I'm totally confused about is the 14-day return policy. While I expect to like the SE, I wanted to be able to activate (again, with my existing number) and test it, including calls and texts.
But I'm concerned because at the bottom of your FAQ about returns, it says, "When you return a device after it's been activated, it will automatically cancel the line associated with that device. This means the number will be lost."
So, just to double-check, does this mean that there is no way to return the SE after activating it, within the 14 days of shipping, and have my number ported back to the 6s? In fact, a short time ago a chat agent (Monica) told me, "If you order the new device on an existing line, the device that you order will not be able to be returned," and "So, if you are planning on not keeping a device that was purchased through an upgrade, I will recommend you to reject the package, otherwise you will stay with a phone you did not wanted."
Totally confused, please help. Is it true there is no way to evaluate and return (if desired) a same-line upgrade without losing my number -- or having the return disallowed completely? I actually use the phone for calls more than anything else, and wanted to make sure the call speaker volume -- which is marginal on the 6s -- is *at least* as good on the SE. If I can't test this without a KEEP-MY-NUMBER return privilege, I guess I *will* refuse the shipment rather than taking a chance.
Sorry if some of my questions seem naive, but again I am fairly new to the smartphone world, and have no prior experience with upgrades. (In fact, is this even considered an "upgrade," given that I paid in full for the 6s, and now the SE, at the time of purchase??) Thanks.