With Samsung switch, your old phone can be copied to the new one with nothing for you to set up. It's the new KIES they had before but better. Switch comes already on the phone. You can do it by computer if you've backed up your phone, or if you have a cable with USB-C on both ends and do it phone to phone. I'm sure they'll sed you the new phone a d then you send the old one. They cant leave you without a phone in between.
2 things...
1st thing - I guess I should differentiate between Samsung, a Verizon store, and and independent dealer, but... "they" *can* leave you without a phone in-between, although that would be so wrong to do so! Before the recall, my first Note 7 had a screen defect where the edges wouldn't register your touch, I was still within my 14 days, and I had already sent my Note 4 back. (edge up plan on Verizon.)
Verizon told my independent dealer that I would have to turn the defective phone in while they ordered me another, leaving me without a phone for days. My dealer said, "OK - will do", and then let me keep the phone while he ordered me my second Note 7. (the recall was 1 day after I got the 2nd Note 7... <sigh>)
2nd thing - I was considering using Switch, as all I wanted to do was literally clone the phone, as I'd spent a lot of time getting it "perfect". However, I opted not to, as I read in some various threads on this that people had issues, and wound up doing factory resets anyway... Who knows, it might work fine, but I'm just going to set it up again as a new phone when I get my THIRD Note 7...
It might be a good idea for a new thread - folks who cloned their phones with Smart Switch, Note 7 to Note 7. Because if that specifically works without issue, agree with Jedi215 that this would be a GREAT timesaver...