I was not available at office since 10 days because God has blessed me with a baby girl so just returned back to work.
Buddy since mobile screens are quite small in resolution therefore it is recommended that you avoid displaying popups in small screen devices else it could effect both your page bounce rate and pageviews. I am personally not a big fan of popups in any way.
Hwowever if your wish to display popups in Tablets and Desktop then you can use the code that I shared in this post:
Facebook JQuery Popup
If in case you don’t want the Facebook like box to be shown then just remove this code from it:
scrolling="no" frameborder="0" style="border:none; overflow:hidden;
width:300px; height:258px;" allowtransparency="true"></iframe>
You can also insert inside it any subscription form widget that we have shared on mbt.
Let me know if you need any help.