1. Automatic Conversion of Pure Numeric Input
Automatically converts pure numeric input into the specified telephone number format.
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2. Open Format Cells
Hover your mouse over the cell where you want to input, right-click, and select
Format Cells
.
3. Set Format
Select
Category
as Custom
, then enter the format: (000) 000 0000
. Click OK to save.
4. Try Entering Pure Numbers
For example, enter the number: 5553211234.

5. Press Enter
The magic happens! You will see the number automatically change to: (555) 321 1234.

6. 🎉 Finish! 🎉
Author's Note: I hope you can feel the effort I put into these tutorials. I hope to create a series of very easy-to-understand Excel tutorials.If it is useful, help me share these tutorials, thank you!
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