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How to add the number telephone show on the header

Step 1 - Please create a Static Block:
(From Static Block > Add New Block)
Step 2 - Copy and add this code for your Static Block
<a href="tel:(+01)-800-3456-88" class="nasa-flex" style="font-size: 115%;" title="Hotline"><i class="nasa-icon icon-nasa-headphone" style="font-size: 28px; position: relative; top: 1px;"></i> (+01)-800-3456-88</a>

Step 3 - Navigate to Appearance → Theme Options → Header and Footer to enable The Block beside Main menu in Header Type 4, 6
