How can I format excel customer list for 1 click call in IOS mobile excel app?

Hi

I use a customer list in Office 365, that includes office phone numbers.

I have formatted a column to initiate a call to the customer office number, using both formulas listed below.  I do not use a VOIP phone system from my laptop.  If I did, a single click on this cell would initiate the call.   

I open this excel using the iPhone Excel app.  Using either of these formulas, requires 4 clicks to initiate the call.
1) Click on the cell
2) Click on 'Link'
3) Click 'Open'
4) Click on 'Call'

My goal is to format this list to be able to initiate a call for each customer number with only 1 click in the iPhone Excel app.  

Any suggestions?

=HYPERLINK("tel:+1"&I3,"CALL")

=HYPERLINK(CONCATENATE("tel:",I8))