Bootstrap 4: Text on image displaced on difference screen size - html

Question

I want the text to look like this on my image:
which is slightly away from the "Center" point of the image(as i want to avoid the phone in the image), so text-center wouldnt work. I currently set the division of the row to "relative" and the text to "Absolute" in order to even get the text on top of the image. But when i resize the image, it will be displaced.
Code:
<section>
<div class="col-lg-12 text-center"style="margin: 0;padding: 0;position: relative;">
<img class="img-fluid" style="width:100%;" src="img/phone-transparent.png" alt=""></img>
<h2 style="color:red;position: absolute; top: 120px; width: 100%;">This is also</br>available on your mobile.</h2>
</div>
</section>
On original screensize:
On a different screensize:

Answer 1

This can be done using only Bootstrap 4 classes. Read the documentation on using the grid, and the utility classes for positioning and flexbox. You don't need all the inline CSS styles.
<div class="container-fluid">
<section class="row no-gutter align-items-center">
<div class="col-lg-12 text-center p-0 d-flex align-items-center">
<img class="img-fluid position-relative mx-auto" src="//placehold.it/1900x400" alt="">
<h3 class="w-100 position-absolute text-danger my-auto">This is also<br>available on your mobile.</h3>
</div>
</section>
</div>
Demo
Remember that .col-* must be placed in the .row, and the .row
should be inside a container.
You can use the spacing utils and CSS object-fit on the image to get the position and size: Demo 2 (you will need to tweak this as desired).