EDIT - sounds like you need to have received the invite email form the AA. However if you do try and sign up anyway they do seem to suggest they'll keep you updated.
AA Members - Sign up to the AA's free in car Wi-Fi trial.
There will be no charge for the device or data used over the trial period, and you won't be asked to provide any payment details.
Once you receive the AA In-Car WiFi device you'll have access to a free in-car WiFi trial plan until it ends on 31st January 2015. We just ask that you agree to complete a short online survey via email about your experience once the trial has finished.
This offer is only available to a select few, as our supply of devices is strictly limited, so to get started just sign up today.