title: In Google Sheets how do I enter the plus sign at the start of a field value?
body: <p>I'm creating a spreadsheet where one column must hold phone numbers.
  Some phone numbers have the plus sign at the beginning of the string.</p>
  <p>However, Attempting to enter a '+' at the start of a field activates a feature of Google Sheets.</p>
  <p>How do I turn this feature off and get fields to just accept alphanumeric strings?</p>