Actually, Heimdall might work with some S5s, just not with mine.
If Heimdall works:*
Power off the your device and connect the USB adapter to the computer (but not to the device, yet).
Boot into download mode:
With the device powered off, hold Volume Down + Home + Power.
Accept the disclaimer, then insert the USB cable into the device.
`heimdall flash --RECOVERY twrp-3.3.1-0-klte.img`
Now we don't want to boot into the system, we want into the new recovery
directly - so turn off the phone with the power button, and then boot into
recovery by holding the power button, the home button, and volume up for a few
seconds. Release them only when you see the blue "Recovery" writing in the top
left of the screen.
Then go to Wipe + Advanced Wipe to wipe the following partitions:
* System
* Data
* Cache
* Dalvik
Then go to Advanced/ADB Sideload, swipe to the right, and execute `adb sideload lineage-xxx.zip` on your computer.
* When it shows something like `Total xfer: 1.00x` or `adb: failed to read command: Success` on the PC, and `Exit code: 1.000000` in TWRP, it has suceeded.
Don't reboot yet, we still want to flash addonsu to root the phone:
Go to Advanced/ADB Sideload, swipe to the right, and execute `adb sideload addonsu-16.0-arm-signed.zip` on your computer.
* When it shows something like `Total xfer: 1.00x` or `adb: failed to read command: Success` on the PC, and `Exit code: 1.000000` in TWRP, it has suceeded.
Go to the Security Settings and encrypt the phone. During the process, it
reboots once and asks you for the device PIN. It can take a while, but not soo
long actually.
### Secure the device encryption
You usually want to have a long password for your device encryption, which you
only have to enter when the phone boots, and a shorter PIN for your lockscreen.
By design, Android doesn't allow this; this is a workaround to make it possible
still.
We will also install an app which shuts down the phone when you get the unlock
code wrong 5 times in a row.
#### Wrong PIN Shutdown
Open the F-Droid app, wait until it is done with "Updating repositories".
Install the app "Wrong PIN Shutdown".
Now go to the developer settings, and enable root for Apps and ADB.
Open "Wrong PIN Shutdown", grant Admin rights until forever, activate the
function, and set it to shut down the phone after 5 wrong tries to enter the
PIN. You can try it out directly - if you enter your PIN wrong 5 times, does it
shut down?
#### Change the encryption password to a long password
First you need to enable USB debugging again. You can enable the developer
options at "About Phone", tap the "build number" seven times. After you enabled
it, you can find the Developer options in the settings at "System > Advanced >
Developer Options". Enable USB debugging and reboot into the bootloader mode:
Then go to the Security settings and set the PIN you want to use for your
lockscreen.
Now you have to backup the files where it is saved. To do so, execute these
commands with adb - you need to be connected to a PC with a proper USB cable:
```
adb root
adb pull /data/system_de/0/spblob/
adb pull /data/misc/keystore/user_0/1000_USRPKEY_synthetic_password_* # the file has a different name; just remove the * and press tab before executing it
adb pull /data/system/locksettings.db
```
Now, go to the Security settings again, and change your PIN to the password you
want to use for the encryption. Unfortunately you can use maximally 17
characters.
Finally, you use adb again to restore the backup of the PIN, which changes your
lockscreen PIN, but not your encryption passphrase: