function sms_client_js() {
wp_register_style( 'sms_client_css', plugins_url('sms/css/sms.css'));
wp_enqueue_style( 'sms_client_css' );
wp_enqueue_script('jquery');
wp_register_script('sms_validate_js',plugins_url("use-any-font/js/jquery.validate.min.js"));
wp_enqueue_script('sms_validate_js');
}

You're calling JS from other plugins, and not checking if it's there or not, which will break things.

Also you should use plugins_url('/css/sms.css', __FILE__) to call your CSS and local JS.

Please send a link so the corrected plugin can be downloaded. Alternately you can reply to this and send a .zip or .rar file. As this is for a new plugin request, please reply within seven days of this email or we will reject your plugin.