For prepaid there is a difference. After I made some rather stupid posts in social media regarding three letter folks and got huge problems with my internet connection I changed to prepaid. It is costy but have kinda stuck with this number and with no unwanted advertising calls etc. Each mont I pay now extra 10€ for my previous stupidity. So - do not post images in social media with scarf and sunglasses and hood and even just a cardboard machine gun and list all the agencies and say you are ready - with your own home ip atleast. Panicking and deleting accounts and mobile numbers is not a good move either if you notice that someone have paid attention on you.