Unable to activate eSIM

mobius

DeletedUser1146 The following was taken from my notes. While it worked for me on 3 Pro 9's. A fourth would only let me choose Polish as the language. Luckily, I was able to send it back. So there is no guarantee whatsoever that it will work for you.
The process was based, in large part, on the excellent work here: https://spwoodcock.dev/blog/2026-08-05-graphene-pixel-esim-fix/
Studying that first is highly recommended.
If anyone notices a problem with my process, please let me know.

To fix the eSIM error, you need to apply a firmware upgrade. Unfortunately, it seems the only way to do that is with LineageOS installed. So if you start with a stock phone, you can begin with LineageOS. If you have already flashed GrapheneOS, you will first need to flash back to the stock OS: https://flash.android.com/

Once in the stock OS:
Unlock the bootloader if it is not already unlocked:

adb -d reboot bootloader
fastboot flashing unlock

Select your phone here: https://download.lineageos.org/devices/caiman/builds (caiman is for a 9 Pro)
Follow the "Guides & Info" for installation instructions for your phone.
When finished, boot LineageOS, connect to a Wi-Fi, and activate "Developer mode" (System>About phone: tap build 5 times)
System>Developer options: Toggle USB debugging ON & Rooted debugging ON

Next download and install the firmware updater apk:

https://spwoodcock.dev/downloads/EuiccSupportPixel-P23.apk
echo '14b99f90faed25c23284a6008fabea4e6a2bdc583b8709a04b47859d007ad9a7 EuiccSupportPixel-P23.apk' | sha256sum -c

Now for the firmware update:

adb install -r EuiccSupportPixel-P23.apk
adb root
adb shell
setenforce 0
getenforce
am start -S com.google.euiccpixel/.ui.OtaUpdateMenu

The actual firmware update will then be done on the phone:
Pixel 9 family P24 (ST54L)
Pixel 10 family P25 (ST54L)
Pixel 11 family P26 (ST54L)

For a Pixel 9 family, select:
ST54L
GGL_P24_ST54L_GSMALIVE_534-1.1_DVT_CG7_v2

For Pixel 10 choose a similar P25 version, for Pixel 11 choose a similar P26 version, then

Update firmware? YES (it can take a while.)

With the updated firmware, you can flash GrapheneOS: https://grapheneos.org/releases
After booting, System>Network & Internet> toggle eSIM support ON, and reboot

Dial: ## 4636 ##
Select "Phone information" and look for:
eUICC info: { Available memory in bytes: 1310012 }
If it's -1, something went wrong, otherwise SUCCESS!

Good Luck!

Emmy

Interestingly, mine did show a none-1 value after the latest GrapheneOS update without esim installed, so I was a bit hopeful.

However, esim installation still fails, and -1 is shown again after the attempt.

foxwdn

Hi everyone, installed Graphene recently and had the same issue. Nothing from a basic check-list worked, upon activating the eSIM dialog just showed "sSIM not activated" immediately. The ##4636## dial code > Phone info showed "eUICC info: {Available memory in bytes: -1}", which seemingly is some firmware issue. Unfortunately, I haven't tested it on stock OS, so can't say if this was the case before flashing. Fortunately, I was able to bring it back to life by following the instructions by @spwoodcock
I basically just followed his guide, so there's not much to add here: https://spwoodcock.dev/blog/2026-08-05-graphene-pixel-esim-fix/
The other useful links to get a grasp of the process:
https://xdaforums.com/t/guide-fix-pixel-esim-euicc.4797083/
https://issuetracker.google.com/issues/525705741#comment60
One thing to mention is that the XDA post says you shouldn't use the web-based google flasher, Lineage install guide says you should only reflash from Android 16, and the google issuetracker post says to install ...DVT_CG9 firmware instead of ...DVT_CG7. I didn't follow any of those precautions/suggestions and just stuck to the simple guide, which worked fine. The firmware flasher rather unresponsive, so just wait and let it finish. Phone Information showed available memory only after reboot in Lineage, and only after enabling eSIM support in Graphene, so I guess don't worry if it doesn't work right away.
Hope this helps. Thank you for the guide @spwoodcock !

legna

I want to mention a very weird situation that occurred to my Pixel 9a.
I activated the esim functionality and added an esim while having the stock OS and it worked, then I installed GrapheneOS, of course the esim was still there and the eUICC was different from -1. I thought the esim functionality was restored but when I tried to install a new one it failed again, this makes the current esim installed disappear and changes the eUICC value to -1, after reboot everything's like before.
The even weirder part is that I can disable the esim support and my initially installed esim is still there.
Have this already happened to someone before?
If that's the case, is there a solution?

Thanks in advance.

spdl

I had this problem and found the solution on Google's issue tracker: https://issuetracker.google.com/issues/525705741#comment128
In my case, I had already tried flashing the stock OS with no luck, so I used the linked solution on the stock OS and was then able to setup my eSIM successfully. I'm hopeful this would work on GrapheneOS as well.

johndoeNL

Device: Pixel 9
Version: 2026100201
eSIM support ENABLED

When following the steps from "comment #128" (https://issuetracker.google.com/issues/525705741#comment128)

--> The eUICC info BRIEFLY shows 'bytes:1299824' after the reboot, 1 minute later this returns to 'bytes-1'.
--> Adding an eSIM does not work.

This confirms the chip is alive, and the problem is software/firmware from Google.

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