NOTE 1 : These builds ONLY WORK for the Teracube 2e 1st batch (SN: 2020) Zirconia, and not 2nd batch (SN:2021). Please read the differences here carefully and install accordingly.
If you are looking for SN:2021 T2e (Emerald), you can find it here.
NOTE 2: All firmwares released for Teracube 2e (2020) & Teracube 2e (2021) don’t pass Play Integrity this includes Android 10/11/12/13/14/15. We’ve explored all options, but implementing Remote Key Provisioning (RKP) a strict requirement for Strong Integrity is simply not feasible for us right now.
NOTE 3: It is expected for the device to stay longer on Teracube logo for the first time after installing the upgrade & The device may respond slow for some time after upgrade, apps are optimising in background. We recommend waiting 15min on idle post upgrade before using it for an optimal experience.
We are thrilled to share our (16.2.0+fd91a35) Android 16 QPR2 for Teracube 2e 2020 as it shipped out with Android 10 all the way to Android 16 
What’s New?
Update to Android 16 QPR2 with February 2026 security patches
Fixed WPA3 Wi-Fi connectivity issues
Slight improvements to app retention in memory
Material 3 expressive design updates
New Quick Settings UI
New status bar icons
New Launcher updates
Enabled blur effects
Steps to Upgrade:
If you are on 16.0.1+73951f6.zirconia
- First install Updater.apk
- Then download and install the incremental update 16.0.2+ebb5373.zirconia.user
- After successfully updating to 16.0.2, proceed with the steps below to install 16.2.0
(Otherwise the update will not install)
For everyone else:
- Download the upgrade zip
file directly on the phone (or transfer the zip to the phone). - Goto Settings > System > Updater (or Teracube Updater)
- Click top-right 3 dots > Local update or Click on the top-right File icon
- Tap “Internal storage” and browse to Downloads or wherever you transferred/downloaded the update zip file.
Note 1 : If Internal storage does not show anything, then reboot the phone.
Note 2 : Do not download the update to SD card.
Note 3 : Before you update, make sure you have at least 6GB of free storage and your battery is at least 50% charged. This will help ensure a smooth update process. - Select the file and continue the update process.
Note: If the Updater closes or crashes, then try again. - Upgrade process will take a while.
- Reboot the phone after the updater says “Update installed”.
- First boot after upgrade can take several minutes.
Do note, after the update, you’ll need to re-enroll your fingerprint and some users have reported that they lose their launcher - icon and widget arrangement. We’d suggest you take a screenshot of your homescreen before performing the update!
Let us know how it went and post your questions/feedback here. Please keep the comments related to this update itself.
If you experience any errors/issues, you can install the original factory software using the automated installer or SP Flash.