Is your Jolla Phone in boot loop? Your Hacking failed? Do you want to reset your phone? Then we can help you!!!
Connect to Recovery
Connect to the recovery to install a RNDIS driver and telnet. According to JollaFR they only tested the instructions under Linux, but they also found methods for Windows and Mac
Windows
1. Install telnet
A. In the Control Panel, go to Programs , and select enable and disable Windows features .
B. Enable Telnet
2. Connect the phone RNDIS
A. Press the lower button and the start button Jolla, and connect the USB to your computer.
B. Install the RNDIS driver. The guide follows (in English) will help you.
3. In the command line, type telnet .
4. In the window that opens, enter o 10.42.66.66 to log into the recovery mode for Jolla
Mac
- Press the lower button and the start button Jolla, and connect the USB to your computer.
- In the command line, type
telnet. - In the window that opens, enter
o 10.42.66.66to log into the recovery mode Jolla.
Linux
- Press the lower button and the start button Jolla, and connect the USB to your computer.
- In the command line, enter
sudo ifup ethX.ethXis the name of the virtual network interface Jolla. - Log on to the Jolla recovery mode via
telnet 10.42.66.66.
You should arrive on the following interface
Jolla Recovery v0.2
Welcome to the recovery tool!
The available options are:
1) Reset phone to factory settings
2) Reboot phone
3) Bootloader unlock [Current state: Locked]
4) Shell
5) Try btrfs recovery if your device is in bootloop
6) Exit
From here you are able to do what you want.
Reboot loop
If your Jolla is in reboot loop, Its only displaying Jolla logo, black screen, re-logo Jolla etc., You can try to repair the btrfs file. Select 5 and restart your phone.
Hack failed
If you attempted hacks on your Jolla and your Jolla no longer restarts? Know that you can easily repair your hack. Go to the shell by selecting 4 .
Then, mount the file system
mkdir / mnt / rootfs
mkdir / mnt / sd
mount / dev/mmcblk0p28 / mnt / rootfs
mount / dev/mmcblk1p1 / mnt / sd
Then get in chroot directly to your Jolla
chroot / mnt / rootfs
And here, you can do the operations you want, such as restoring backups.
Source: JollaFr
The Jolla Blog 
The Windows instructions are a bit insecure. Why would one want to enable Telnet Server on the Windows laptop by ticking all Telnet features? Enabling Telnet Client should be enough.
it is not telnet server, it’s telnet client which is requried, correct.
but you may also just use putty. http://www.putty.nl
And the “mount the file system’ instructions have way too many spaces, there should only be one after the first word on each line.
Awesome, I was looking for information on how to mount the root file-system through recovery mode, and your instructions are spot on. Thanks!
some little changes needed 🙂
wrong:
mount / dev/mmcblk0p28 / mnt / rootfs
…
and right:
mount /dev/mmcblk0p28 /mnt/rootfs
…
wrong:
chroot / mnt / rootfs
and right:
chroot /mnt/rootfs