Get post related to current post

From what i understand of your question, you are trying to do a meta query. You can do this by the following arguments:

$args = array(
    'posts_per_page' => 10, 
    'post_type' => 'mobile',
    'meta_query' => array(
        array(
            'key' => 'select2_posts',
            'compare' => 'LIKE',
            'value' =>  $value_here
        )
    )
);

You can read more about meta queries here.

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