There is no way you could dial an "x" on a standard telephone - so you never would!
Before there were dial or push button phones, there were crank phones. You lifted the ear piece from the hook, tuned the crank on the side of the phone, which rang the operator. She would answer the phone with "Number, please." You told her the number, and she would dial it for you.
Dial #31# before the phone number
For outgoing Comcast phone calls. Dial *82 before you dial your intended number to unblock your phone number for one phone call.
Dial *67 before the number. Note: this does not work on calls outside of the U.S. Dial 141 before the number for the U.K
*67 before you dial the number
*67 then your number
Normally you dial * then 6 then 7. If you are using a rotary phone, you can dial 1167 instead of *67.
Usually, the term "dial-up number" refers to the phone number you dial with your modem for dial-up Internet.
To dial a mobile phone when it is overseas, dial exactly the same number you would if that mobile phone were at home.
Put 141 before the number you dial
911
You would dial 911 for an emergency.