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SKY I'm Back (pantech-ef71)

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Pantech SKY I'm Back
IM-100 with sxmo
IM-100 with sxmo
Manufacturer Pantech
Name SKY I'm Back
Codename pantech-ef71
Model IM-100
Released 2016
Type handset
Hardware
Chipset Qualcomm Snapdragon 430 (MSM8937)
Display 1920x1080 LCD
Storage 32GB
Memory 2GB
Architecture aarch64
Software
Original software
The software and version the device was shipped with.
Android 6.0.1
Extended version
The most recent supported version from the manufacturer.
Android
postmarketOS
Category downstream
Mainline
Instead of a Linux kernel fork, it is possible to run (Close to) Mainline.
no
pmOS kernel
The kernel version that runs on the device's port.
3.18
Features
Flashing
It is possible to flash the device with pmbootstrap flasher.
Works
USB Networking
After connecting the device with USB to your PC, you can connect to it via telnet (initramfs) or SSH (booted system).
Broken
Battery
Charging and battery level reporting works
Works
Screen
Display works. Ideally with sleep mode and brightness control.
Works
Touchscreen
Works
Multimedia
3D Acceleration
Broken
Audio
Audio playback, microphone, headset and buttons.
Broken
Camera
Untested
Connectivity
WiFi
Works
Bluetooth
Untested
GPS
Untested
Modem
Calls
Broken
SMS
Broken
Mobile data
Broken
Miscellaneous
FDE
Full disk encryption and unlocking with unl0kr.
Untested
Sensors
Accelerometer
Auto screen rotation works in desktops e.g. Phosh or Plasma Mobile
Broken

Contributors

  • HexagonWin

Maintainer(s)

HexagonWin

Users owning this device

  • Hexagonwin (Notes: Currently playing around halium and android, will try mainline later on.)


How to enter flash mode

If your bootloader is unlocked, when you boot it will prompt you to click the wheel key to enter Boot menu. If you don't have bootloader unlocked, turn the device off and click wheel key and power button simultaneousely to enter Boot menu. Navigate by clicking wheel key and select with the power key.

How to enter the Pantech Developer Menu

In the boot menu, there is a "Pantech Developer Menu". To enter this, it needs a password (Special key combinations). Click with wheel - power - wheel - wheel - power key, and it will show the pantech developer menu where you can see more info. (You can also enter Pantech's proprietary PDL-OS Download mode here)

How to re-lock device

You have to first flash IM-110's aboot, this is not recommended. This can even brick your device.

Installation

Fastboot installation works well, but sometimes fail for an unknown reason. Micro SD Card slot installation works well. You can also dualboot with android by installing pmOS on the micro sd card, and flashing pmOS and Android to each Recovery partition and the android boot partition.

Recovery zip installation was the most stable

Problems

For an unknown reason, the USB port does not work. You can only charge the phone, however OTG does not work and computer also does not detect it. According to a unofficial LineageOS, etc rom developer for this phone, it uses Pantech's codes for it, and needs to be changed to caf codes in the future. While the developer said that it can work with the kernel he made for cm-14, this is untested. pmOS is currently using lineage-16 kernel he made.

Device needs proprietary Qualcomm drivers from the stock firmware and the /vendor partition in the device, because the device uses Qualcomm Wireless Lan device inside it.

This device is not upstreamed yet, as I (HexagonWin) is being very busy.

Mainline?

The xiaomi-santoni device which has a similar Soc has some developed mainlining effort, however it is not in the torvald's tree and I (hexagonwin) do not know how to do this, so this isn't done yet.

See also