SKY I'm Back (pantech-ef71)

Features
Flashing	Works
USB Networking	Broken
Internal storage
SD card
Battery	Works
Screen	Works
Touchscreen	Works
Multimedia
3D Acceleration	Broken
Audio	Broken
Camera
Camera Flash
Connectivity
WiFi	Works
Bluetooth
GPS
NFC
Modem
Calls	Broken
SMS	Broken
Mobile data	Broken
Miscellaneous
FDE
USB OTG
HDMI/DP
Sensors
Accelerometer	Broken
Magnetometer
Ambient Light
Proximity
Hall Effect
Haptics
Barometer

Pantech SKY I'm Back
	; 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	Android
Original version	6.0.1
postmarketOS
Category	testing
Pre-built images	no
postmarketOS kernel	3.18

Contributors

HexagonWin

Maintainer(s)

HexagonWin

Users owning this device

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.