I've used a firewall on my phone: <a href="https://play.google.com/store/apps/details?id=app.greyshirts.firewall" rel="nofollow">https://play.google.com/store/apps/details?id=app.greyshirts...</a> The firewall is brilliant in that it sets up a 'VPN', that all connections must go through. Bam, no more notifications from any shitty apps that got a request from a marketer to annoy you. However, it won't help with the apps that you have a love/hate relationship with (ie Viber).<p>You will be SHOCKED at how many apps insist on a connection to the internet despite not apparently needing a connection. I even had apps I never use, still try to call home!<p>On a sidenote, I love how the app also gives Wifi or Mobile Data option. ie, prohibited updates unless over WiFi.