Simply make a 3×5 grid

2	m	x
t	7	6
a	i	n
7	4	p
r	a	x

 

Read from lower left r

rax74paint762mx

Check your keyboard to find the range

All letters are in the first row of letters on the keyboard. Simply shift them to the numbers row

yuuouwtutqiouoitiwtytrttyiiw

6779725751897985825654556882

Make pairs

67 79 72 57 51 89 79 85 82 56 54 55 68 82

Convert decime to Ascii

COH93YOUR867DR

You’ll need an old school type of phone to send this code to friends.

Using the Mobile phone keypad layout (also called Vanity code), replace each letter with the number that it is found on, keeping the 0’s and 1’s as is. But instead of the normal method where you repeat the number for how many times you need to press that key to gain the letter, we just use a single number per letter.
90797854537377806982706967845351508781
Pair them up
90 79 78 54 53 73 77 80 69 82 70 69 67 84 53 51 50 87 81
and convert from decimal to text
ZON65IMPERFECT532WQ