Make spreadsheet phone fields useful.
Start with a row. Check its number before the next import or workflow step.

Normalize the number for free.
Keep phone values as text so plus signs and leading zeros survive.

Save the checked fields with the row.
Keep the original input. Save international format and country beside it.

Stop invalid rows before paid checks.
Keep an invalid number or missing input out of the paid lookup step.

Reuse the result after a failed write.
For paid checks, retain the original operation and source revision. Recover that result before retrying the destination write.

Start with one row.
Install the Make invitation app and import the sheet blueprint. Run manually with free basic checks and a zero spending limit first.