Instruction for phone-Calls in USA

[immihelp]

May I ask you to give me instruction how can I dial Alpha-numeric phone
number using following phones:

"UNISONIC" and "ATLINKS" USA Model 29318GE1+A

[immihelp]

2 - A B C
3 - D E F
4 - G H I
5 - J K L
6 - M N O
7 - P Q R S
8 - T U V
9 - W X Y Z

[immihelp]

What and how meny times should I press to get these letters?

[immihelp]

Just once.

For example, to dial (866) INSU-BUY, you would just dial (866) 467-8289.

[immihelp]

Sorry, but need to know all steps to get the letters I need. Eg which number and how many times I have to press to get eg a letter N or C.

[immihelp]

For N - press 6 one time.
For C - Press 2 one time.