A:AnswerIt's a watch face size difference, the 40mm are typically worn by women, and 44mm by men, however we purchased the 44mm for my mom so she would have an easier time seeing the apps and info etc on the watch face. It's just personal preference.
A:AnswerBecause you can purchase and activate cell service with these carriers at Best Buy, they also offer purchase of the Apple Watch with them. If these options are chosen it normally offers it to you on their payment plans. I purchased my Apple Watch 40mm with Cellular directly from Best Buy. I then brought it to AT&T to activate as a "Bring Your Own Device".
A:AnswerIt should work on any network. The watch cell number is paired to your phone cell number so you can answer calls on your watch. There will be a charge for the service from your wireless carrier, usually around $10 per month.
A:AnswerIf it has cellular you can activate it later with Verizon. That’s what I had my mom do. I just got my Apple Watch less than a month ago, my bill with Verizon shows I have a free month for my Apple Watch but that it’ll be a $10 fee. So far it looks to me like it’s cheaper than adding another phone line.. but that part I could be wrong..
A:AnswerNo you don’t. I didn’t even activate mine. I figured I didn’t want to pay the $10/ month unless I had to. So far I’m using it wi-fi & it’s fine.