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Installing Phi

Required Reading​

Phi has multiple entrypoints (method of launching). The exploit used at the moment is compatible with Epsilon 16.3.0 through 18.2.0 (except 16.4.3).

What you need​

Section I - Installing Phi​

  1. Power on your device.
  2. Plug your device to a computer.
  3. Open Chromium.
  4. Go to the Phi Installer.
  5. Click "Connect to Numworks calculator" and select your calculator.
  6. The calculator will show a message reading "Third party applications".
  7. Press Back.

Section II - Running Phi​

  1. Scroll down in the apps list and select "Phi Installer".
  2. Press OK.
  3. The screen should blink and you should see a screen similar to this one:

Phi launch screen

info

If the screen turns yellow, the version or Epsilon you're using isn't yet supported. You may need to change your version.

caution

If the screen turns red, the exploit failed. RESET the calculator and try again. If it doesn't work the second time, please join the Omega Discord.

Section III - Unlocking the calculator​

We are now going to unlock the internal flash and remove the write protection:

  1. Press 1 to unlock the internal flash.
  2. Press OK to confirm
  3. You should now see something like this:

Phi unlock screen

The "Reset RDP" stage can take a bit of time. You'll be sent back to the main menu after a second, after the unlocking is done.

Section IV - Erasing the internal flash​

Removing the write protection should have erased the internal flash, but we are going to do it again, just to be sure:

  1. Press 2 to reset the internal flash.
  2. Press OK to confirm.
  3. You should see something like this:

Phi erase screen

The "Erase flash" stage can take a bit of time. You'll be put back on the main menu after a second, when the erasing is done.

Section V - Installing a custom bootloader​

  1. Press 3.
  2. Press OK to confirm.
  3. You should see something like this:

Phi launch screen

The "Write flash" stage can take a bit of time. You'll be put back on the main menu after a second, when the flashing is done.

Press 4, then OK. You should now boot back into Epsilon.

Section VI - Finalizing unlocking​

  1. Press 4.
  2. Press OK to confirm.
  3. The calculator restarts on Epsilon and Phi has disappeared.
info

If you don't boot back into Epsilon, don't worry, installing a Custom OS will fix it later.