I have a Coolpad Note 3 and I am trying to unlock the fastboot (bootloader).
Everything is perfectly setup on my Laptop except for one thing that I cannot install recoveries or flash my device through Sp Flash tool.
I have Ubuntu 16.04 LTS on my laptop. Surprisingly I can use adb and connect my phone wired or wirelessly while I develop and test my apps through Android Studio. Although I had no luck with Unity remote for developing and testing through Unity 5.x versions.
I mean that I can connect my phone to my laptop and test apps over WiFi/Wire cause I and it works perfect and I can use adb commands through the terminal as well. Only problem is I cannot use fastboot. Actually running fastboot in the terminal produces the regular output it should i.e.
$ fastboot
usage: fastboot [ <option> ] <command>
commands:
update <filename> reflash device from update.zip
flashall flash boot, system, vendor and if
found,
recovery
flash <partition> [ <filename> ] write a file to a flash partition
erase <partition> erase a flash partition
format[:[<fs type>][:[<size>]] <partition> format a flash partition.
Can override the fs type and/or
size the bootloader reports.
getvar <variable> display a bootloader variable
boot <kernel> [ <ramdisk> [ <second> ] ] download and boot kernel
flash:raw boot <kernel> [ <ramdisk> [ <second> ] ] create bootimage and
flash it
devices list all connected devices
continue continue with autoboot
reboot reboot device normally
reboot-bootloader reboot device into bootloader
help show this help message
options:
-w erase userdata and cache (and
format
if supported by partition type)
-u do not first erase partition
before
formatting
-s <specific device> specify device serial number
or path to device port
-l with "devices", lists device
paths
-p <product> specify product name
-c <cmdline> override kernel commandline
-i <vendor id> specify a custom USB vendor id
-b <base_addr> specify a custom kernel base
address.
default: 0x10000000
-n <page size> specify the nand page size.
default: 2048
-S <size>[K|M|G] automatically sparse files
greater
than size. 0 to disable
Using fastboot devices in terminal has no output.
Same results for sudo fastboot devices and I even tried $(which fastboot) devices and sudo $(which fastboot) devices. No luck on my end.
My Android phone is :
Coolpad Note 3
Running Marshmallow Stock ROM
Rom is unmodified and stock
Phone is not rooted.
Also no custom software like a recovery
Can anybody help me with running fastboot with my Coolpad Note 3.
I found a simple workaround following this method listed on this website here :
http://abhisek.github.io/coolpad_note3/porting/2015/11/05/unlocking-the-bootloader.html
What I did for my solution based on the websites instructions
First I booted up my phone normally.
Connect it to your laptop or PC (if you are still using one)
Fire up a terminal (on Ubuntu) or minimal ADB for windows (sorry I don't know for MacOS)
type adb reboot bootloader
As soon as I booted into bootloader I enter
fastboot -i 0x1ebf devices into the terminal and I could successfully see the following output:
devicefastbootidhere fastboot
where devicefastbootidhere is the fastboot id of your android device
then I tried to unlock the oem
$ fastboot -i 0x1ebf oem unlock
and was shot down with the following output :
...
FAILED (remote: unknown command)
finished. total time: 0.002s
I tried not to lose any hope despite the failure:
( The website says that on Coolpad Note 3 like devices you have to enable the option to unlock the oem from the Developer settings ... more on that in the link above )
What worked for me was that my Coolpad Note 3 was running Marshmallow and CoolUI 6.0. older version of my device i.e. my device Coolpad Note 3 was originally shipped with Lollipop as stock Firmware. I manually have flashed the new Marshmallow Stock ROM. What I did next was lucky for me. I do hope other Coolpad users get it right too.
I used fastboot -i 0x1ebf flash recovery /path/to/recovery_twrp.img
and I was greeted with the following output;
target reported max download size of 134217728 bytes
sending 'recovery' (16384 KB)...
OKAY [ 1.683s]
writing 'recovery'...
finished. total time: 1.686s
On the website above the author mentions additional steps to follow to flash recovery on Coolpad Note 3 through fastboot but I didn't had to follow them. I was actually successfull in flashing recovery through fastboot. But for every fastboot command I have to use
fastboot -i 0x1ebf <command here> <options> this method.