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Telekom Puls (alcatel-ttab)

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Alcatel Telekom Puls
Telekom Puls failing to find the root partition
Telekom Puls failing to find the root partition
Manufacturer Alcatel
Name Telekom Puls
Codename alcatel-ttab
Model N/A
Released 2015
Type tablet
Hardware
Chipset MediaTek MT8127
CPU 4x 1.3 GHz ARM Cortex-A7
GPU ARM Mali-450 MP4
Display 1280 x 800 IPS
Storage 16 GB
Memory 1 GB
Architecture armv7
Software
Original software Android
Original version
The version the device was shipped with.
6.0
postmarketOS
Category downstream
pmOS kernel
The kernel version that runs on the device's port.
3.10.108
Features
Flashing
It is possible to flash the device with pmbootstrap flasher.
Partial
USB Networking
After connecting the device with USB to your PC, you can connect to it via telnet (initramfs) or SSH (booted system).
Works
Internal storage
eMMC, SD cards, UFS, ...
Broken
SD card
Also includes other external storage cards
Untested
Battery
Charging and battery level reporting works
Untested
Screen
Display works. Ideally with sleep mode and brightness control.
Works
Touchscreen
Untested
Multimedia
3D Acceleration
Untested
Audio
Audio playback, microphone, headset and buttons.
Untested
Camera
Untested
Connectivity
WiFi
Untested
Bluetooth
Untested
GPS
Untested
NFC
Near Field Communication
Untested
Modem
Calls
Untested
SMS
Untested
Mobile data
Untested
Miscellaneous
FDE
Full disk encryption and unlocking with unl0kr.
Untested
USB OTG
USB On-The-Go or USB-C Role switching
Untested
Sensors
Accelerometer
Auto screen rotation works in desktops e.g. Phosh or Plasma Mobile
Untested
Magnetometer
Sensor to measure magnetism
Untested
Ambient Light
Untested
Proximity
Untested
Hall Effect
Also known as flip cover sensor
Untested
Barometer
Sensor to measure air pressure
Untested
Power Sensor
Sensor to monitor current, voltage and power. Not fuel gauge!
Untested


Contributors

  • 504TimeOut

Users owning this device


How to enter flash mode

  • Power off the device, hold Volume Up + Power and wait for a menu to appear, if needed select fastboot mode.
  • Use adb reboot bootloader.

Installation

Using pmbootstrap

  1. After you entered fastboot mode, use fastboot oem unlock to unlock and confirm on the device.
  2. Install TWRP with fastboot flash recovery twrp.img
  3. pmbootstrap init -> select alcatel as vendor and ttab as codename.
  4. Proceed with installation like this: pmbootstrap install --android-recovery-zip. Note that --recovery-install-partition does not seem to have an impact on wether or not the root partition can be found.
  5. Boot into recovery. Either through Vol Up + Power and selecting recovery mode as option or through fastboot after flashing fastboot reboot recovery
  6. Select the sideload feature in TWRP and sideload the recovery zip adb sideload pmos-alcatel-ttab.zip

Issues

Unknown chunk type

When you try to flash via pmbootstrap flasher flash_rootfs, this will most likely result in

Sending sparse 'userdata' 1/8 (127446 KB)          OKAY [  3.490s]
Writing 'userdata'                                 FAILED (remote: 'Unknown chunk type')
fastboot: error: Command failed

I don't know why. It "works" when using the recovery.zip.

Root Partition

The device tries to boot but is unable to find the root partition. At least on internal storage. I have yet to try a SD-Card. The SD-Card fails, but not in the same way. Here, it tries to load, the screen turns black and the tablet is off.

Additional Notes

  • As of now (April 2025), the Telekom Puls is not able to find the root partition. If plugged into a Computer, a USB-Network connection will be established and the device can be accessed via telnet like this telnet 172.16.42.1
  • The back of the Telekom Puls has Text printed on the back which includes 'Telekom Puls' and right after that 'Alcatel OneTouch', which gives reason to suspect it's based on one. An Alcatel OneTouch which looks similar to the Telekom Puls and is supported by postmarketOS does not seem to exist.

See also