how block/filter adult content?

hello, if you control the wifi network then you might try a solution like: http://blog.opendns.com/2012/01/12/opendnss-free-parental-controls-protects-your-ipads-kindles-and-mobile-devices-too/ https://support.opendns.com/entries/42848890-Android-Configuration-instructions-for-OpenDNS for filtering on a mobile connection you will have to contact your network operator to see if there are any options available...