This is my build of Dees-Troy’s Team Win Recovery Project (TWRP) 3.0.2-0 for Cube iWork8 Ultimate (I1-T/I1-TD/I1-TWB/I1-TC) and iWork8 Air (I1-TF/I1-TBF). There’s (at least) seven different batches of iWork8 Ultimate & iWork8 Air with slightly different hardware. Choose the right image for your model! I1-TWB image is reported working on I1-TF-20161108 and I1-TFB devices.

Do not mirror my builds! Please post a link to this page instead.

recovery-twrp3020-cht_cr_mrd.img (I1-T)
https://www.androidfilehost.com/?fid=24659325368664657
md5:e0e1fd387d1b53a0c0348684e9a482d6

recovery-twrp-3.0.2-0-cht_cr_mrd.zip (I1-T - TWRP flashable)
https://www.androidfilehost.com/?fid=24659325368664664
md5:d0f5954b5b6c1643eb12c432c1bd55b4

recovery-twrp3020-cht_cr_mrd-I1-TD.img (I1-TD)
https://www.androidfilehost.com/?fid=24659325368664658
md5:685f49cd2afea43244f4d87b4108be42

recovery-twrp-3.0.2-0-cht_cr_mrd-I1-TD.zip (I1-TD - TWRP flashable)
https://www.androidfilehost.com/?fid=24659325368664663
md5:52622da1825ae72f860068918b327ecf

recovery-twrp3020-cht_cr_mrd-I1-TWB.img (I1-TWB)
https://www.androidfilehost.com/?fid=24659325368664659
md5:7070c1fef6875f66ea86c57f154eb10d

recovery-twrp-3.0.2-0-cht_cr_mrd-I1-TWB.zip (I1-TWB - TWRP flashable)
https://www.androidfilehost.com/?fid=24659325368664661
md5:8d706944a8c6faeb9bcab3aa60a4c1f9

recovery-twrp3020-cht_cr_mrd-I1-TC.img (I1-TC)
https://www.androidfilehost.com/?fid=24591000424954409
md5:0f16e31fa86b8a291c76e680134140b8

recovery-twrp-3.0.2-0-cht_cr_mrd-I1-TC.zip (I1-TC - TWRP flashable)
https://www.androidfilehost.com/?fid=24591000424954410
md5:48e23993871c6378a946de2c133371a5

recovery-twrp3020-cht_cr_mrd-I1-TF.img (I1-TF)
https://www.androidfilehost.com/?fid=24659325368664660
md5:5e227464fa775f216d60bddefc34d1ea

recovery-twrp-3.0.2-0-cht_cr_mrd-I1-TF.zip (I1-TF - TWRP flashable)
https://www.androidfilehost.com/?fid=24659325368664662
md5:d843481ca2e07a4697f678d52eeb875b

Prerequisites:

Unlocking the bootloader:

  • Enable developer settings by clicking ‘Settings -> About tablet -> Build number’ several times. Enable ‘Settings -> Developer options -> OEM unlocking’ (not sure if necessary) and ‘Settings -> Developer options -> Android debugging’.
  • Plug in your device via USB cable and open terminal window as an administrator (Windows). Boot device into bootloader by executing
adb reboot bootloader

You can also boot to bootloader by holding volume down button in dual boot menu and selecting to boot to Android.

  • Execute in terminal
fastboot oem unlock

Menu appears on the device warning that unlocking the bootloader will erase the device. Use volume keys to select the option to approve and use power key to confirm. It will try to format the data partition but fails because the bootloader is pretty useless (see below). Bootloader will be unlocked, though.

Notes about the bootloader:
Android bootloader is not working properly because of how Windows partition are named (not prepended with ‘android_’ what the bootloader expects). You can see a warning message when booted to bootloader and some bootloader functions are not working properly. You can’t use fastboot to flash any image! Good thing is that you can still use fastboot to boot images. It also possible to fix this by booting the tablet to Windows and use something like ‘GPT fdisk’ tool to rename the Windows partitions (add ‘android_’ prefix). This is not absolutely necessary though if you’re not planning to use fastboot to flash images.

Installing TWRP:

  • Download both TWRP recovery image and TWRP flashable zip from this post. Save the TWRP flashable zip to your device’s sdcard. Save the TWRP recovery image to a place you can access in terminal window.
  • Change into the directory you saved the TWRP recovery image, boot to bootloader as above, and execute
fastboot boot recovery-twrp3020-cht_cr_mrd.img
  • Install TWRP flashable zip from sdcard once booted to TWRP.
  • Reboot recovery.

You can boot to TWRP by executing ‘adb reboot recovery’. It’s also possible to boot to recovery by booting to bootloader first (as above), using volume keys to select ‘recovery’ option and using power key to confirm.

If you’ve renamed Windows partitions (see above), you can use ‘fastboot flash recovery recovery-twrp3020-cht_cr_mrd.img’ to install the recovery image.

Stock ROM is encrypted by default which means data partition is not accessible in TWRP before you format it (select ‘Wipe -> Format Data’ - doing a factory reset is not enough). Important! This will erase your data including internal sdcard. It’s recommended to do this once when installing dm-verity disabled/unencrypted boot image or flashing a custom ROM (CyanogenMod 12.1, CyanogenMod 13, Remix OS).

Sources:

31.5. changelog

  • initial release