The procedure described in News does not seem to work in most cases, so we are providing some additional details here. Updating from version 6 to version 7.4 poses no problem if the bootloader is unlocked, and does not require formatting the data.
If the bootloader is locked, a factory reset (data format) will be required and the procedure described in News may not work. In that case there are two options for performing the update using a computer:
1. Completely reinstall the system by following these instructions starting from step 2, which requires bootloader unlocking (and, if wanted, relocking).
2. Flash the OTA update in recovery mode, which does not require bootloader unlocking:
Reboot in recovery mode: type on computer adb reboot recovery if you activated USB debugging, or reboot the system and hold on ‘Volume down’, then select ‘Recovery mode’.
Go to ‘Apply update’, then ‘Apply from ADB’.
Type on computer adb sideload iode-7.4-20260405-FP4-ota.zip. At the end answer ‘No’ to the question asked (reboot to recovery to install additional packages).
Go to ‘Factory reset’, then select ‘Format data/factory reset’.
Sorry, but there is no way to not wipe your userdata either via factory reset through Recovery after you sideload the OTA update (option 2 you are asking about), or instead by clean installation (option 1). I am assuming this is the reason you are asking
ok, thanks for the information, I’m sure it’s out of your hands, all my updates so far have been seamless.
Any tips / tricks on a way to restore apps after an upgrade to 7.4, or is that entirely out of the question and I’ll be manually downloading all apps again?
Please use Seedvault! It is built in, will handle all app reinstalls (and even several system settings, etc.). But it will not restore app data for encrypted apps (messaging apps, thunderbird, etc. also I saw AntennaPod not restore). However, all of the apps that don’t restore data that I know of do have built-in app backup / restore options (or have cloud based configuration stored, so just need to re-login to them after restore).
Backup Steps:
Get all the backups from inside the apps you care about copied off the device
Get all the files you care about (pictures, documents, etc.) backed up off the device
Use “System Settings > System > Seevault” to make a backup and save it off the device
THEN after you are sure, back it all up again
Restore Steps after upgrade / reinstall:
Copy Seedvault backup to phone and restore (restores apps)
Copy files (pictures, documents, etc.) back to phone
For apps with data not restored: copy app backups to device and restore from within apps
Login to other apps
Hopefully are you sitting good with a fresh system and all your data again!
Note: after apps are installed by Seedvault, the first time they have an update from Aurora they will not auto-update. You will have to tap “update” in Aurora for this time only (Aurora will only auto-install updates for apps installed within Aurora… but after the first manual update then the app will be seen as installed by Aurora and auto-update for the following updates).
Is there any possible disadvantage of option 2 over 1? I always fear unlocking and relocking the bootloader with the FP4. I did it twice so far, so at the moment the bootloader is locked.
I prefer sideloading if there is no potential issue.
I’ve an esim in my phone, is seedvault working to restore it after update ? My provider do not allow to do a reactivation in my case (since I’m abroad)
Is anybody else experiencing issues with telephony after upgrading to 7.4? Neither my eSIM nor my regular SIM are working for making or receiving calls. SMS and mobile data are unaffected.
No clue about APN settings, never had to fiddle with those. I did not need to reinstall the eSIM. Though I did because I thought it would fix my phone issues.
For the APN settings, you can check on your phone provider documentation (APN + phone provider name on a search engine). Normally they are explained clearly!
Great for the eSIM not disabling after upgrading! Thanks for the info
Were your bootloader unlocked or locked?
I updated with option 2 and everything went smooth. eSIMs are there and telephone with the standard app and a regular SIM works.
I used the seedvault backup for the first time and was surprised how much it could recover. Nevertheless since it recovers a lot but not everything it is still a search through everything.
Thank you very much for keeping also the FP4 up to date!
Please clarify what country / carrier you use and what your current APN settings are. I think this issue is not related to the FP4 specifically, so if the problem remains, please start a new issue.
Thanks for getting back at me. I am in Switzerland, provider is Galaxus, which uses the Sunrise network. After some digging, I found that the IMS registration fails for some reason, which is apparently causing VoLTE to fail (they switched off the 3G network by the end of last year, so no VoLTE = No calls). I contacted the provider’s support but they couldn’t provide any insight as to why IMS registration fails. The APN settings are the default for the provider. Downloading the eSIM to a different device showed that the settings are correct, I could use VoLTE and VoWiFi no problem. Tested a Swisscom SIM in my FP4 which also worked no problem for VoLTE and VoWiFi. So I’m just gonna solve this by switching providers. One thing that might need mentioning is that VoWiFi never worked for me, but VoLTE did until the update. I never gave it much thought but maybe there was always something off about that device/OS/provider combo…
In the move from Lineage 22.x (iodéOS 6.x) to Lineage 23.x (iodéOS 7.x) there have been instances of APN settings getting a bit mangled. I have tried to follow the LineageOS development in that regard, but it is a bit confusing why the regression (they do generate their default APN settings differently now, but it seems like the output should be the same?). Anyway, I suspect that is what happened for you.
I did try to help someone with Sunrise CH in the past few months, I can’t recall if they solved it or not. The best I can find for manual setup on their site is for a Moto device: Instructions for your mobile phone | Support which seems fairly basic, just use “internet” in the APN field, and ipv4 only.
You can check the VoLTE registration by using *#*#4636#*#* and then going to “Phone Information > 3 Dots > IMS Status”
