How to use letters on the keypad. I need to put my ID in witch has both numbers and letter. So if my ID is 345CZY56 it would look like this. 345222999999956 -
![The standard 12-key telephone keypad, character layout follows the ITU... | Download Scientific Diagram The standard 12-key telephone keypad, character layout follows the ITU... | Download Scientific Diagram](https://www.researchgate.net/profile/Shumin-Zhai/publication/221518150/figure/fig1/AS:305488823635968@1449845619238/The-standard-12-key-telephone-keypad-character-layout-follows-the-ITU-E161-standard-8_Q320.jpg)
The standard 12-key telephone keypad, character layout follows the ITU... | Download Scientific Diagram
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