It's also for existing customers, i applied it to my account and it credited me right at $48. One of the main reasons why i decided to give it a try was because it lowered the phone down to $624 which in my opinion is a great deal.
I to was worried about having to do a new account, just sign in and apply credit. You'll need the code from your email to get it.
Go to T-Mobile's lg g flex page click on the part were it talks about netflix, then click more info and just follow instructions.
Sent from my LG-D959 using Tapatalk