Android Enthusiasts Stack Exchange is a question and answer site for enthusiasts and power users of the Android operating system. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I want to encrypt my apps and personal data, such as passwords to email etc.

If I have factory reset my phone (GS2sprint) and it is fully charged (over 90%) and plugged in. So I went to Settings→Apps→Security, and from there to Encrypt or Encrypt SDCard -- but it won't let me encrypt: The buttons are grayed out.

Why won't it let me encrypt? I have a new file that I have not seen before which is sprint extention. It will not let me stop it and like I said after Hard Factory reset it still will not let me encrypt anything.

share|improve this question
Could you be a little more specific: Encrypt what? Full device encryption? Which steps have you taken? What happens? Where exactly are you stuck? Any error message -- or does the phone simply shuts down, electroshocks you (not letting you touch it further), ejects the battery, whatever? – Izzy Apr 6 '13 at 19:30
yes i will. Encryption in my phone is in apps/security/encrypt or encrypt sd card. Encrypt my apps and personal data, such as passwords to email etc. I've charged phone to over 90% with charger still connected and it will not let me touch it like its not highlited. I just dont understand why its there if you or (I) cant use it! – JAY Apr 10 '13 at 14:15
I updated your question accordingly, JAY. Please do the same with the following details: What kind of lock-screen security have you set up -- PIN, password, pattern, or none? AFAIR encryption does not accept one of them. You might want to read How to Encrypt Your Android Phone and Why You Might Want To -- which says it must be either PIN or password set up before you can encrypt. – Izzy Apr 10 '13 at 14:24
I've set up a pin for my lock screen. – JAY Apr 10 '13 at 14:29
Thank you for your help Izzy! – JAY Apr 10 '13 at 14:39

I know I am late to this discussion, but, for others out there that may have not gotten an answer to this yet, device encryption on some devices may only work with a strong password. A (medium security) PIN may not be enough.

share|improve this answer

You already have to have a strong password selected and installed and then the encryption button will be available for you to press.

share|improve this answer

The Android phone must be fully charged (100%) and charging in order to encrypt your phone. The button will change dark when your phone is fully charged and charging. There is now a notification text about the thing in the Android 6.x. It also says that the encryption may take one hour and more.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.