HYPERLINK() is the function to create links. But it doesn't support (or offers)
tel:
or
call:
link types.
The supported link types are http://
, https://, mailto:, aim:, ftp://, gopher://, telnet://
and news://
.
***WORKAROUND***
Then the next option is using any supporting add-on that you can find by searching the menu Add-on->Get add-ons.
But without installing any add-on it's possible to make numbers in google sheets click to call.
Please find the step-by-step instructions below.
DISCLAIMER: Use it at your own risk!
Steps:
1. Enter the phone number as a text string (starting with a single quote).
2. In cell B1, insert this formula.
=HYPERLINK("https://ctrlq.org/call/"&A1, "Call Google Support")
You may be able to click this link in cell B1 to call.
You might then want to make the Google Voice dialer as default dialer. Maybe this thread will help.
See if that helps?
Best,
Prashanth KV