If you are trying to write a number in Excel or Google Sheets that starts with zero (0), you may not do that due to the default settings. In that case, you should follow this tutorial to enter zero ...

How to force a consistent phone number format in Microsoft Excel Your email has been sent Combine an Excel custom format with data validation and remove the pressure ...

Lists of phone numbers are very common with Microsoft Excel editors. In the case of landline and foreign phone numbers, adding the country code is important, or the caller will never be able to dial ...