docs: Add Teracube 2s (sapphire)

architecture: "arm64"

battery: { removable: true, capacity: 4000, tech: "Li-Ion" }

bluetooth: { spec: "5.0" }

cameras:

  - { flash: "LED", info: "13+8 MP rear" }

  - { flash: "LED", info: "8 MP Front" }

codename: "sapphire"

cpu: "Cortex-A53"

cpu_cores: "8"

cpu_freq: "4 x 2.20 GHz + 4 x 1.60 GHz"

gpu: "Imagination Technologies PowerVR Rogue GE8320"

current_branch: "21"

height: "155.2 mm (6.1 in)"

width: "73.3 mm"

depth: "10.1 mm"

image: "sapphire.jpg"

is_ab_device: true

kernel: { repo: "android_kernel_teracube_mt6765", version: "4.19" }

maintainers: []

models: ["Serial Number starting with 2025 (ex: 202501T2Sxxxxxx)"]

name: "Teracube 2s (2025)"

network:

  - { tech: "2G", bands: "850 900 1800 1900" }

  - { tech: "3G", bands: "1 2 4 5 8" }

  - { tech: "4G", bands: "1 2 3 4 5 7 12 17 20" }

  - { tech: "4G", bands: "VoLTE" }

  - { tech: "4G", bands: "VoWiFi" }

available_in_murena_store: true

nfc: true

peripherals:

  [

    "Fingerprint Scanner",

    "Dedicated Dual SIM slots",

    "Dedicated Micro SD Card Slot",

    "3.5mm Headphone Jack",

    "USB-C Port",

    "USB OTG",

    "NFC",

    "GPS",

    "A-GPS",

    "Galileo",

    "GLONASS",

    "Accelerometer",

    "Ambient Light Sensor",

    "Compass",

    "Gyroscope",

    "Magnetometer",

    "Proximity Sensor",

    "FM Radio",

    "Wi-Fi Display",

  ]

ram: "4 GB"

release: 2025

screen: "6.1 in"

screen_ppi: "282"

screen_res: "720x1560"

screen_tech: "HD+ IPS LCD"

screen_refresh_rate: "60"

sdcard: "Up to 128 GB"

soc: "Mediatek Helio G36 (MT6765V/XBA)"

storage: "64 GB"

tree: "android_device_teracube_sapphire"

type: "phone"

community_doc_url:

vendor: "Teracube"

vendor_short: "teracube"

wifi: "802.11 a/b/g/n/ac, Dual band, Wi-Fi Direct, Hotspot"

build_version_dev: "U"

build_version_stable: "U"

is_lineageos_official: false

install_e: "install_e_sapphire"

removable_battery: 1

sim_slots: 2

region: "All"

maturity: "green"

install:

  - { mode: "Official Install Doc" }

  - { mode: "/e/OS Installer" }

  - { mode: "Murena smartphones" }

display_erecovery: false

before_install_file_name: "before_install_sapphire"

install_e_file_name: "install_e_sapphire"

requirements_file_name: "requirements_sapphire"

verified_boot:

  - { vendor: "Any vendor", supported: "yes" }

bootloader_relocking:

  - { vendor: "Any vendor", supported: "yes" }

safetynet: 1

rootbeer_pass: 1

## Enabling USB debugging and OEM unlock

{% include alerts/danger.html content="Please take a backup of your data as unlocking the bootloader will reset your device to factory defaults." %}

1. Connect device to a PC via USB-C cable

2. Enable `Developer Options` following the guide given [here](/pages/enable-usb-debugging#to-become-a-developer)

3. Enable `USB debugging` option following the guide given [here](/pages/enable-usb-debugging#to-allow-usb-debugging)

   - Click on `OK` for `Allow USB debugging?` prompt

   - Click on `Allow` for `Allow USB debugging?` prompt showing computer's RSA key fingerprint

4. Enable `OEM Unlock` option following the guide given [here](/pages/enable-usb-debugging#steps-to-enable-oem-unlock-through-the-developer-options)

## Booting into fastboot and unlocking bootloader

1. Reboot to fastboot using either of two methods (Automatic or Manual)

    - Automatic

      - From your computer, run

        `adb reboot bootloader`

    - Manual

      - Turn off your phone and enter boot menu by holding `volume up` and `power` keys

      - The boot menu will present three options, press `volume up` until `Bootloader` is selected

      - Press `power` to accept this choice

2. Unlock the device with the following command

   - `fastboot flashing unlock`

3. Accept any prompts that may appear on device

4. If successful, it will show success message on PC and device

5. Reboot the device with the following command

   - `fastboot reboot`

## Installing /e/OS from the bootloader

{% include alerts/tip.html content="For Windows users, we advise to use Git Bash. For more info about Downloads and Installation see [Official Documentation](https://git-scm.com/about)" %}

1. Unzip the archive

    ```

    unzip <fileyoudownloaded>

    ```

   > Replace `<fileyoudownloaded>` with the name of the archive file you downloaded

   > Alternately, you can create a folder and unzip the archive there

2. Confirm that extracted directory contains following content:

    - `bin-linux-x86 directory` - which contains linux tools including fastboot and adb

    - `bin-msys directory` - which contains Windows tools including fastboot and adb

    - `bin-darwin directory` - which contains MacOS tools including fastboot and adb

    - `img files` - The `img` files to be flashed on the device

    - `flash_sapphire_factory.sh` - The installer script

3. Boot into bootloader/fastboot mode

   - Turn off your phone and enter boot menu by holding `volume up` and `power` keys

   - The boot menu will present three options, press `volume up` until `Bootloader` is selected

   - Press `power` to accept this choice

4. Run the installer script on Terminal(Linux) or on Git Bash UI(Windows)

    - Make sure you are in the current directory which contains the `flash_sapphire_factory.sh` file

    **Linux**

    - Right click -> Open terminal here

    **Windows**

    - Right click -> Git Bash here

    - Execute the following command:

    ```

   chmod +x flash_sapphire_factory.sh && ./flash_sapphire_factory.sh

    ```

    The script will flash all required files and reboot device automatically

## Booting into fastboot and locking bootloader

1. Reboot to fastboot using either of two methods (Automatic or Manual)

    - Automatic

      - From your computer, run

        `adb reboot bootloader`

    - Manual

      - Turn off your phone and enter boot menu by holding `volume up` and `power` keys

      - The boot menu will present three options, press `volume up` until `Bootloader` is selected

      - Press `power` to accept this choice

2. Lock the device with the following command

   - `fastboot flashing lock`

3. Accept any prompts that may appear on device

4. If successful, it will show success message on PC and device

5. Reboot the device with the following command

   - `fastboot reboot`

{% include templates/requirements.md %}

{% include alerts/danger.html content="Before moving forward, ensure your device is a Teracube 2s (2025). Please look at the serial number under the battery or dial \*#06#. If the serial number starts with 2025 (ex: **2025**01T2Sxxxxxx), you are at the right place!" %}