Android 15.0.1 for Teracube 2e 2nd Batch Emerald (SN: 2021)

[Terabot]

NOTE 1 : These builds ONLY WORK for the Teracube 2e 2nd batch (SN: 2021) Emerald, and not 1st batch (SN:2020). Please read the differences here carefully and install accordingly.
If you are looking for SN:2020 T2e (Zirconia), you can find it here.

NOTE 2: These builds are currently only pass the Device Integrity level in Play Integrity. This means that most applications will function correctly, but Google Wallet will not work .We strongly recommend users of Android 13 and 14 builds to migrate to Android 15 . This is because the older Android 13/14 builds are no longer passing even the basic integrity check. 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 4th major upgrade (15.0.1+006f77f) Android 15 for Teracube 2e 2021 as it launched with Android 11 all the way to Android 15

What’s New?

Android 15 features and improvements
Security patches updated to 2025-10-05
Improved system perfomance
Enhanced battery optimization
Updated system apps

(Note: If you’re currently on Android 11/13/14, those builds no longer pass basic integrity - we strongly recommend upgrading to Android 15)

Steps to Upgrade:

1. Download the upgrade zip file directly on the phone (or transfer the zip to the phone).
2. Goto Settings > System > Updater (or Teracube Updater)
3. Click top-right 3 dots > Local update or Click on the top-right File icon
4. 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.
5. Select the file and continue the update process.
   Note: If the Updater closes or crashes, then try again.
6. Upgrade process will take a while.
7. Reboot the phone after the updater says “Update installed”.
8. 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.

[svedise]

Just installed the 15.0.1 in our two Emerald phones so they seem to work great they are faster and smoother.
Thank you

[vedicaudio]

Hi,
Thanks for the notification. Since Google inevitably removes features or introduces new restrictions with each new major version of Android in the name of “security” would anyone who knows care to share what are the ones that happened with version 15 specifically? (I’m talking about things like not allowing apps to put the phone into airplane mode, or to write to wherever they want on the SD card, things you used to be able to do when Android was still fun). Are there any popular apps that no longer function or require major re-jigs to get working when upgrading to version 15?

[svedise]

So far no trouble everything works the same just smoother and faster.

[Jannic]

I highly recommend the upgrade.
It’s faster then 12/13 and it fixed the bug in 14 that constantly restarted my phone.
I didn’t see any ill effects on the apps I’m running.
Great work!!

[Terabot]

We have something special cooking internally, cannot wait to share it (You wouldn’t guess whats coming to your T2E)

[jandr]

I installed the Lineageos version of Android 14 from this thread early in 2024. Can I smoothly update from the LOS version to this one?

(When Teracube announced the certified 14.1.0 release I asked the same question and @Maymne replied that I’d need to begin with the initial SP Flash, then go first to Android 13 before 14. I never did move to 14.1.0 so I’m still on the LineageOS 14 and thought I’d ask again for 15 just to be sure I do it right).

Thanks.

[Saijin_Naib]

Are you looking to do a “dirty flash” so you don’t need to reset/clean-install the device and have it work like an OTA update (keeping all user data)?

If so, that isn’t supported nor really recommended, but it sometimes can be done successfully.

As for a regular upgrade from LOS to mainline Android, then you’d need to flash back to stock via SPFlash, yes. Using the latest SPFlash image available should be fine as a base to ugprade via OTA from that point on.

[jandr]

Thanks @Saijin_Naib, indeed I was wondering if I can do a dirty flash, or if not, how best to start a clean reinstall.

[del] SPFlash seems to be a Windows application. What should I do as a Linux or Mac user? [/del] (Nvm, I dug through the SPFlash thread and found the Linux instructions.)