how to change fa-icon twitter to odnoklassniki ?

I do not think this is available, I think better to replace icon with image or svg.

tell me how to do it?

Open plugin files (probably seller.php), remove icon, add own SVG, update stylesheet.

I'm trying to change the twitter icon   } else if($id == 'tw') {
    return ($type == 'icon' ? 'fa-twitter' : __('Twitter', 'business_profile')); to the odnoklassnikov icon   } else if($id == 'ok') {
    return ($type == 'icon' ? 'fa-odnolkassniki' : __('Odnoklassniki', 'business_profile')); but the icon is not showing

What else needs to be changed to make it appear?

I'm trying to change the twitter icon

Code: [Select]

  } else if($id == 'tw') {
    return ($type == 'icon' ? 'fa-twitter' : __('Twitter', 'business_profile')); to the odnoklassnikov icon

Code: [Select]

  } else if($id == 'ok') {
    return ($type == 'icon' ? 'fa-odnolkassniki' : __('Odnoklassniki', 'business_profile')); but the icon is not showing

Please note that you have a syntax error.
It's either fa-odnoklassniki or fa-odnoklassniki-square

So it should be:
  } else if($id == 'ok') {
    return ($type == 'icon' ? 'fa-odnoklassniki' : __('Odnoklassniki', 'business_profile'));
Clean browser cache and refresh.
Hope it helps (I don't have access to the plugin).

unfortunately the icon is not displayed even if the cache is cleared

I am not aware such icon would be in font awesome 4.7 set

https://fontawesome.com/v4.7/icon/vk  this icon also doesn't work when i set values   } else if($id == 'vk') {
    return ($type == 'icon' ? 'fa-vk' : __('VK', 'business_profile'));

'fab fa-vk'
'fab fa-odnoklassniki-square'
'fab fa-odnoklassniki'

'fab fa-vk'
'fab fa-odnoklassniki-square'
'fab fa-odnoklassniki'

Thanks! everything is working