Since you have the iPhone 6, you can have it unlocked from AT&T. There is a process to do so.

Once unlocked, purchase a Verizon pay as you go to see how you like it. Service, data, price and such.

Verizon uses different bands as appose to AT&T, but the iPhone 6 works with it. I purchased my iPhone 6Plus on AT&T, then after 8 months of their BS, I went back to Verizon. I’ve been with VZW for over 10 years, except for those 8 months with my phone and my girlfriend’s son’s phone. Luckily I kept her on VZW for contract reason. So I still had the account opened.

KOT