Samsung s5e SM-T720 bloquée à Android 12

[piero]

@piero

What was the StockOS version installed before /e/ ?

adb shell getprop ro.boot.bootloader →

@piero

What is the current StockOS available ?

https://samfw.com/firmware/SM-T720/XEF/T720XXS3DWA1 → T720XXS3DWA1 basée sur Android 11

@piero

does Lineage wiki offer a firmware upgrade solution without loosing /data

Update firmware on gts4lvwifi | LineageOS Wiki → T720XXS3DWA1

@piero

does /e/ builds include the upgraded needed parts of the firmware

NO

/e/OS community gts4lvwifi download

.

EN CONCLUSION

tu peux installer la nouvelle version directement

@piero

HowTo perform a dirty upgrade to “/e/OS-T” from a previous /e/ version ?

→ it is as simple as a dirty update…

there are multiple ways :

1. download the file, go to " → settings → system updater" and use the called “locale update” feature if you have it in the “3 dot menu”.

OR

2. download the file, boot the phone to the recovery mode and use “apply update” then “from internal storage” if your “recovery mode” have the feature.

OR

3. download the file on a SDcard, boot the phone to the recovery mode and use “apply update” then “from External SDcard” if your “recovery mode” have the feature.

OR

4. download the file on a computer, boot the phone to the recovery mode and use “apply update” then “from ADB” :

Edit :

i just published this HowTo in reaction to your interrogation :
[HOWTO] Upgrade my /e/OS to major Android version without loosing /data