If you can use something, it's useful. Useful things are handy for whatever you're doing. If something is just what you need or you just find it helpful, then it's useful. A hammer is useful in building many things. Coasters are useful if you don't want a coffee table to get stains. College degrees are useful â or necessary â for many careers.
Where is the security key on a comcast modem located? The security key on a Comcast Modem is located next to the serial  number of the unit. Sometimes the serial number is the number used  as a security code if it is not printeâ¦d on the device. (MORE) 1 person found this useful.
http://www.tomshardware.com/forum/370-73-find-xfinity-wifi-password. How do i find my xfinity wifi password-Configuration-Windows 8. Answer: The password for the WIFI should be on the side of the router, unless you or someone else ... How to find or change your wireless security key. http://customer.comcast ...