Monday
long time Verizon customer moving to Visible. Visible is out of stock on wanted new phone, so bought Samsung locally. In setting up account on Visible "bring phone" should I use current (old) phone's IMEI, or the IMEI of the new phone (not yet activated)?
Monday - last edited Monday
Either one provided its IMEI shows as compatible. I'd try the new one myself. You're porting the number not the phone itself.
I assume you're going for the current SWITCH25 promo. However you can also use someone's referral code. Enter/apply both the referral code and the promo code. You'll be prompted which one to choose. Obviously choose the SWITCH25. It won't make any difference to you but whomever's referral code you use will get a credit.
Referral codes can be found in the Savings Spot or folks' posting histories.