How to link a column having formula

I have asked my guests to enter mobile number and name in a form.
Now in my base, the mobile number will be a unique value that will be used for linking to another table.
But I can’t link a column with a formula (concatenate) & if I convert phone-number or a text column into the linked column - then a new guest will not be able to enter data in the form but will have the option to choose someone else’s number only. Any suggestions?

Hi @sourav_kumar - two suggestions for you, see these posts:


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