Wileyfox Swift stuck/boot loop

[metabaron1]

Hi all.
I have a phone stuck in boot loop. It's a stock ROM, Android 7.1.2 (January 2018) but I dont have exact image reference (Wileyfox/switf/crackling 7.1.2/N2G48B/eeea277114 from recovery mode) . Secure boot is still enabled and phone is locked, but I have the unlock schema

When the phone boots, it stucks approximately 2 seconds after the lock screen. The screen then turns off and it reboots after a few minutes. If I am fast enougth, I sometimes have time to unlock but it freezes immediately after, and reboot after a while.

It started after the phone has been turned off. The last application installed is the GEEV application. Maybe it's the cause, or maybe the phone is full.

What I tried:
As stated in Facebook Wileyfox post ( unable to post full url: officialwileyfox/posts/1844545742523409),
I can access the safe mode (vol down at Wileyfox logo), but it does not change anything, it still stucks and I can not deactivate the last application installed.
I can access the bootloader and recovery mode, but I cannot access it via adb / fastboot (linux), I suppose because I cannot enable acces in devolopper mode in phone setting. I tried to update an older image from SD card, but the phone refused to downgrade to an older image.
I also tried to wipe cache partition.

Photo and contacts are backup, only SMS are not backup and I would like to access it.
Do you have any suggestion to access user partition or unblock the phone wihout wiping user data?

Thanks

 

[robin0800]

If you can reach recovery mode there should be a phone reset option that can clear the apps.

 

[metabaron1]

Here are recovery mode choices:
-Reboot system
-Reboot to booloader
-Apply update from ADB
-Apply update from SD card
-Wipe data/factory reset
-Wipe cache partition
-View recovery logs
-Run graphics test
-Power off

I already tried wipe cache partition without result.
But I didn't try wipe data as this will also wipe SMS, won't it?

 

[robin0800]

SMS should be saved to the cloud and restored when you enter your gmail account after the reset.

 

[metabaron1]

No it's not saved, that's why I need to access the phone if there is a way

 

[robin0800]

If you can unlock the bootloader you could install twrp recovery which has an mtp mode which would give you access to your files. Suspect unlock bootloader will not be available to you.