Hello community,
Does anyone have a procedure to update an A5 from /e/OS Q to R without lost data ?
Thanks
Hi,
I personnaly had trouble to perform the upgrade, and ended up loosing all my data, see my post back then : community.e.foundation/t/samsung-galaxy-a5-2017-upgrade-to-r-failed-rollback-to-q-error/35117
Don’t know if it helps, but since R seems to be the last Android version that will come up for this device, it should be the last fresh install with data loss in the worst case scenario 
Hi,
Thanks…and…so…
I successfully upgraded my phone from Q (e-1.8.1-q-20230206257879-dev-a5y17lte.zip) to R (e-1.19.1-r-20240110372392-dev-a5y17lte.zip WITHOUT losing my data
- To do this, I first made a backup of my phone with this tutorial :https://community.e.foundation/t/howto-backup-and-restore-data-on-android-devices/23292
- I have deactivated the unlock code on my screen.
- And with adb
adb reboot recovey
- On TWRP : Advanced → ADB Sideload
- On PC :
adb adb sideload e-1.19.1-r-20240110372392-dev-a5y17lte.zip
- then reboot system
I had a problem with the sound card at the beginning. I repeated the procedure to downgrade to e-1.17-r-20231111351093-dev-a5y17lte.zip, reboot system and upgrade again to e-1.19.1-r-20240110372392-dev-a5y17lte.zip. The sound problem has been corrected as below.
Good luck to you
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