Unhappy I don't have the optión for Encrypt my Android. How I can do it?

Hello

have recently stole my phone, and I realized that more important than the smartphone is information and passwords. So I want/need encrypt my new smartphone. Searching in internet I saw android have a buil-in option for encrypt and is good for me because must wipe the phone for can use if was stole again.

But I have a problem. I don't have the option for encrypt the smartphone

I bought a THL T11 and the stock rom doesn't have this option. I rooted and don't appears. I change the rom (I put two different) and also don't have the option for encrypt. I ready this option is only for Android 4.0.4 or high, but I have 4.2.2

can this featured be download and install ? how I can use it?

Adjust > Personal > Security > and I don't have the option for encryp it.

Any one can help me please? I really search on internet and can't find a solution for do it. Thanks for read me.

Profesor Yeow >>> Yeow.com.ar