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[Q] Prompted for Device storage encryption password after decryption

I had encrypted enforced through a company policy. Device worked fine no problems. Enter pin at boot and in we go.
This policy was removed and I de-encrypted the device. Still no problems.
The device clearly showed it was not encrypted and I had the option to encrypt - so all good so far.
I rebooted the device and was asked for my device storage password. I entered my old pin and it booted ok. Bit strange I thought but device works so that's good right?
So I did a factory reset. Same thing happened. prompted for a PIN
I re flashed the phone back to the original carrier ROM - same thing. Still being prompted for PIN.
I installed TWRP 2.6 and did a format - same thing.
Does anyone have any idea how to get rid of the encryption? (Well the fact it keeps asking for the de-encryption PIN - as its actually not encrypted)
thanks

backup password

wondering if there is a workaround for this,my tablet has given me no issues,up till now...this morning it was asking for a backup password(which i cant remember) i normally use pin or fingerprint for security...any help..kinda vexing

Did you setup a Samsung account? This worked for a coworker with a S5 - fingerprint scanner went wonky and she forgot her backup password as well.
Try doing this:
View attachment 3712498
Source: http://trendblog.net/how-to-bypass-android-phone-lock-screen-pattern-pin-password/

so im not the only one, this happened to me as well, no finger scanning option only backup password (which I cant remember)
what I did is delete 2 files using TWRP file manager under data/system password.key and gesture.key.
reboot your phone and you'll end up with a swipe to unlock
go to settings and change your backup password (will prompt fingerprint) . you may activate your lockscreen with fingerprint again, it may ask you for the backup password but this time, you already know what it is and once you put it in, everythign should be back to normal
let me know if you have question
---------- Post added at 11:44 AM ---------- Previous post was at 11:42 AM ----------
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additional: the steps above is assuming that you got locked out and cant get past through your lockscreen.

Encryption not active... but it should

Hi Guys,
My OnePlus 3 ist rooted, open Bootloader + TWRP.
Oxygen OS 3.2.4 is running. First time I used the device, encryption was offered to me - so I set it up.
I than used the phone for about 2 months, always had to enter a Passphrase when I rebootet.
I noticed, that if I use TWRP I can browse through my personal files without entering any credentials.
System-Preferences says: "Phone Encrypted".
Do you have any suggestions for me?

I´ve found the solution by myself.
Anyone who is having the same issue, read this thread: http://forum.xda-developers.com/oneplus-3/help/questions-encryption-unlocked-op3-t3427360/page2
You have to set up the display security again and activate the checkbox "PIN/Passphrase is needed to start the device".

Password protected phone

Ok, Ill admit I didnt research things fully, and went on my merry way flashing things mercilessly in hopes to find something I really liked.
I ended up flashing a 7.0 rom and it wanted me to add a fingerprint, which meant I added a pattern. This put that damn pattern everyway, except fastboot/bootloader
I wanted to remove it, a user suggested a delete userdata and rebuild - I did that, only I deleted everything, all partitions.
Now, the code representation of my pattern doesnt work and recovery doesnt do much, doesnt mount anything.
Where, Im currently at / things Ive tried to get going again:
adb sideload: seems to work, says it serving the file, but nothing happens ( thought it was immediately supposed to start installing? ) Cant seem to find the file in sdcard or sideload. I suspect its because things are not being mounted.
fastboot works as Ive tried reinstalling TWRP in efforts to remove the damn password. That seemed to have installed, but the password persists and my old one ( the pattern above ) does not work.
Please tell me how to correct this password madness and get a working phone again.

same here +1

Ok so I flashed: cm-13.0-20160820-SNAPSHOT-ZNH5YAO0J6-oneplus3-recovery.img from https://download.cyanogenmod.org?device=oneplus3
and did a factory reset and Im up and running again.

You can turn off PIN on boot/ boot into TWRP but it's enabled by default and it's not obvious how to do it. You have to turn off the pattern (set your security type to None), then re-enable a pattern. At that point it will ask you if you want a pattern on boot or not.

Follow the path.. What'd I do?!

Hey guys -
Need some detective help. I did something to my 10, and I think I did something with the encryption, but I'm not sure how or what.
Follow me here, since I'm not sure what caused it, I'll start at the beginning, and see if anything raises a red flag..
Got phone from HTC, US unlocked version. Got it in.. heck, this past June, I think.
Unlocked bootloader. Got Sunshine, ran it, but never paid and never turned S-OFF.
Never set PIN or Fingerprint.
Installed Viper10 when it was out.
Went to do fingerprint. Got screen saying that for backup, needed to set PIN. Set PIN, then taught it some fingerprints.
Never had data issues, and as far as I know, never encrypted phone. TWRP, when run, did not need me to enter any password or key to access the phone. On bootup, would get PIN prompt, but AFTER Android loaded.
Never got any RUUs, never upgraded Viper10.
Installed CM13 today. Whohoo!
Install went fine, no issues. Restored apps from TiBu, deleted unused bloatware, including the built-in Android keyboard.
Set up other options, and finally got to enter in fingerprints.
It gives me the same screen I got on Viper. This time, though (and I have no idea why), I back out back to Security settings, and enter in PIN there.
Then train fingerprints!
Now, when I reboot system, or boot to TWRP, I get a prompt asking for password (TWRP) or PIN (Android). HOWEVER.. I can enter my pin in TWRP just fine. But not Android. Apparently, since it hasn't booted, Swype doesn't work, and I get no keyboard. Can't enter PIN in at all.
That is my mistake, however, as I removed the built-in Android keyboard. (Something I've done countless times before on other Android versions without issue..)
So I restore Nandroid backup of Viper10. I still get the PIN entry, and STILL have no keyboard.
I see reference in TWRP about PINs not working, so I delete that locksettings.db file (from memory, filename is likely wrong here..)
Phone boots up. Yay. No PIN prompt. Yay.
But now I do NOT have data - as in, it's acting like my phone is unencrypted now.
So, what I'd like to know is -
If NOW my phone is unencrypted, and I'm getting the 'No Data' issue, what was my phone doing BEFORE, when I didn't have to enter PIN, but was getting data?
How can I get BACK to not having to enter PIN and still get data? (In my case, will the instructions for unencrypted work? Or is my phone now 'special'?)
How did I set the PIN the first time on Viper10, and not have it encrypt my phone? I'd like to ultimately get back to THAT scenario - where the lockscreen asks for PIN, but nothing else does (TWRP, Bootup, etc).
Thanks guys!
-Mike

I may be pointing the obvious, but have you do a full wipe before restoring your nandroid? If so, did you try to clean flash your rom to see what happens?
Maybe by removing stock keyboard something got messed up and keeps the keyboard in your nandroid from properly installing.

Yup, I tried restoring the Nandroid several times, some with wiping, some without. Also, I always clean-flash my new ROMs (i.e. ones not restored from nandroid backup, installed new, like going from Viper10 -> CM13)
Going to try again today while at work, see what happens.

During setup in CM13, there should be option to require PIN at startup (It is usually checked by default). Uncheck it and your phone will remain encrypted without requiring a PIN to start.

jackebuehner said:
During setup in CM13, there should be option to require PIN at startup (It is usually checked by default). Uncheck it and your phone will remain encrypted without requiring a PIN to start.
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Click to collapse
Technically correct (encrypted) but effectively incorrect: encryption is moot if a password is not required to decrypt it. It would be like locking your door and leaving the key in it: it's locked but it's not secure.
You need a system keyboard to be able to enter PIN on bootup; hence, the pre-installed keyboard (Google on vanilla, TouchPal on htc) isn't really 'bloatware' as it's necessary. Google makes a good keyboard; TouchPal, though, yeah, necessary bloatware in this case.

Rolo42 said:
Technically correct (encrypted) but effectively incorrect: encryption is moot if a password is not required to decrypt it. It would be like locking your door and leaving the key in it: it's locked but it's not secure.
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Click to collapse
Ah, so in previous ROMs (both OEM and Viper10, it technically WAS encrypted, I just never set the password? .. Huh.
Rolo42 said:
You need a system keyboard to be able to enter PIN on bootup; hence, the pre-installed keyboard (Google on vanilla, TouchPal on htc) isn't really 'bloatware' as it's necessary. Google makes a good keyboard; TouchPal, though, yeah, necessary bloatware in this case.
Click to expand...
Click to collapse
Interesting, thanks for this; good to know. A shame, but good to know that's just how it is.

coyttl said:
Ah, so in previous ROMs (both OEM and Viper10, it technically WAS encrypted, I just never set the password? .. Huh.
Interesting, thanks for this; good to know. A shame, but good to know that's just how it is.
Click to expand...
Click to collapse
Correct. The password is to get at the encryption key; it isn't the encryption key itself.
Bitlocker/SED works the same way. Otherwise, a password change would mean re-encrypting everything.
If you put in the wrong password, it'll look like you have no data.