I'm a bit shocked when parents don't bother having any parental restrictions on younger teens phones
. There are some truely disgusting and disturbing images out there. Most parents wouldn't leave a pile of 'extreme' violent pornagraphic magazines in my teens bedroom in the 'hope' they wouldn't look at them but are happy for them to have free access to similar stuff online.
I would never risk the remotest possibility that my child might be exposed to this type of thing. What if they accidentally saw some child pornography?? It doesn't bear thinking about. Even if you have the most angelic child in the world you still have to prevent them unintentionally seeing awful things. I once made the innocent mistake of looking up 'tongue thrust' in a dental health sort of way.....
Well, I won't be doing that again.
As a PP mentioned the easiest thing to do is to get 18+ stuff blocked by you mobile provider.
I also like the parental restrictions available on IPhones and other ios devices. It's really simple to set up and can be tailored to your child. You need to set up restrictions - which is extremely easy. My favourite feature is the following. (For ios7)
PREVENTING CHILDREN FROM BEING ABLE TO DELETE THEIR BROWSING HISTORY .
SETTINGS >>>> GENERAL. >>> RESTRICTIONS >>> your private PIN NUMBER that your child DOESNT know >>>> WEBSITES >>> then tick LIMIT ADULT CONTENT
This removes the option to delete the history of which websites your child has visited. You can also add in rating restrictions for other types of media eg youtube etc.
I imagine other phones have similar ways of setting up parental restrictions.
Or you can just not bother.....