c7000

> My choices for wif connection are Netgear 40 and netgear 40-5g which
> do I choose for home computer/ipad/phone

   Which one works better?

   Have you read the "Specify Basic WiFi Settings" section of the User
Manual?

http://www.downloads.netgear.com/files/GDC/C7000/C7000_Comcast_UM_27apr15.pdf

   Generally, the 2.4GHz radio has longer range, but lower speed.
Conversely, the 5GHz radio may have shorter range, but higher speed.
Some devices may support only one radio band or the other.