Inconsistencies receiving SMS

new-user-98425

I installed GOS a month ago and I am very happy with ist. But recently, I ran into very annoying issues and I am not sure what the problem is. For starters: I only use the Owner-Profile.

I had to setup SMS 2FA for Kleinanzeigen (they only offer this option). I entered the correct phone number, but never received the SMS. First, I thought it was a Kleinanzeigen issue. But when I inserted my SIM into mt Work-iPhone, the SMS came in just fine (also the ones i requested before). Obviously, this is a physical SIM and at that point, this was the only SIM in my phone and I used the default SMS App.
The strange thing is: I can receive SMS from my spouse or verification codes from o2 just fine. Kleinanzeigen seems to be the only one acting up. Do you have any idea?
A few days ago, I registered an eSIM with my phone. Right of the bat I noticed that I was unable to receive SMS from o2 on that eSIM. It doesn't matter, whether I got it configured as the primary SMS card or not. I can, however, receive SMS from my work iPhone. I just can't make any sense of it.

I had SpamBlocker installed initially (but disabled for SMS) and uninstalled it, just in case. But it didn't change anything. Do you have any idea on these issues? I saw a couple of people having issues with SMS on a secondary profile, but I don't use that feature at all.

Thank you :)

xr4y

Did you come to a solution? I have the exact same problem: Switched from an iPhone to GrapheneOS. I think i did all the right steps:

deregistered iMessage
Reset Mobile Network Settings in Settings > System > Reset options
gave GOS messaging app all permissions
of course rebooted a couple of times

SMS itself seems to work fine for everything else except kleinanzeigen. I receive 2FA codes from various other services, get notified about my mailbox and can write back and forth with different contacts.

I also tried changing the number again into my number in the kleinanzeigen app on my iphone (without the SIM, just connected via WiFi) to check if simply the sms request from the app might be blocked on GOS without any notification. But still no sms. As soon as I changed the number into the one from my girlfriend she got the sms. She is using a stock iPhone and we both use the same carrier, which leads me to the conclusion that is is also not related to the carriers sms spam filters.

I would be grateful for any other hints or suggestions. I myself could live without the kleinanzeigen app but I would like to understand the behavior and am also asking myself if there might be other sms I might not receive.

Kamika242

xr4y

This is a failure of Kleinanzeigen, not of GrapheneOS. I had the same problem and the net is full of descriptions of this problem, Kleinanzeigen doesn't care.
Last week came an update for Kleinanzeigen via Aurora and like of a wizards hand the SMS came in and the login was successful.

new-user-98425

No, I did not, unfortunately. I ended up using the eSIM for Kleinanzeigen (which was my intention anyway). The carrier for the eSIM is the same as my physical SIM (o2). I asked the Kleinanzeigen Support, but they were no help at all and took 2 weeks for each reply.

legreteco

The most consistency I experienced is when using google messages as SMS app. I don't know why but that's what worked for me.

xr4y

thx a lot for your replies. Since aurora should simply mirror the apk from the play store there should be no difference.
You are right that there are several reports about SMS 2FA not working from kleinanzeigen, but most of them are a few years old and also could be account related. This post here is the only one I found where the description matches: GrapheneOS, switch from iOS, everything else seems to work with a physical SIM.

I already have contacted the kleinanzeigen support and asked them to check if there might be a problem with their internal 2FA block lists. I'll keep you posted. But new-user's answer doesn't give me much hope, if I will stay stuck at first level support.

Using Google Messages is not an option for me right now. As I said before: i don't really care about kleinanzeigen. I care about the technical issue and would like to understand it not least because I would like to be certain that there is no problem with other SMS that might be important. Up to this point I can tell: I receive SMS from every other service, where I can trigger a SMS. I can send and receive SMS from various contacts that use different carriers. On the one hand this is reassuring on the other hand I simply do not get what might be the deal with kleinanzeigen.

It is not a account related 2FA block because changing it to another number worked instantly
since the other number also runs in the same carrier network it is not carrier related
it is not a number related 2FA block because putting my SIM back in my iPhone worked instantly
i think it is NOT an app related problem because triggering the 2FA from my WiFi connected iPhone and therefore the iOS version did also not work. But it does by using another number or putting my SIM back in my iPhone. I also tried using the web frontend via desktop pc in different browsers. Still no SMS.

So the issue has something to do with the combination of putting my SIM into my grapheneOS phone and receiving SMS there. For whatever reason. I have no good explanation for that. But it has to be on the receiving end. Because of all the other tests I have to assume that sending the SMS itself has been triggered.

Kamika242

xr4y So the issue has something to do with the combination of putting my SIM into my grapheneOS phone and receiving SMS there. For whatever reason. I have no good explanation for that. But it has to be on the receiving end. Because of all the other tests I have to assume that sending the SMS itself has been triggered.

I tried several times several ways to receive the SMS, from "send again" over different SMS apps to completely unblocked (DNS) connection, I never got the SMS and I still monitored Kleinanzeigen on my old and now backup-phone, I didn't dare to logout there in fear, I could never login again.
My standard SMS app is Fossify-Messages and right after the last update of Kleinanzeigen the login worked as ist should be, so it's not a matter of the used SMS app or GrapheneOS.
The whole problem is definitely caused by Kleinanzeigen.

Kamika242

xr4y Since aurora should simply mirror the apk from the play store there should be no difference.

There is a difference, the app might be the same, but they can check their installation source.
On standard android some apps installed from Aurora reject to start with the request to install the app from Playstore, for example DM or HEOS.

xr4y

I am glad that it seems to work for you. I tried the current version from aurora (v2026.18.3) and it does not work unfortunately. Aurora also seems to be behind in case of mirroring kleinanzeigen right now since the current play store build for kleinanzeigen is 2026.19.1 (at least I assume it is a classic build number that is not date related like 19th of jan or 18th of mar). Right now I am hesitating a bit to try it with fossify-messages. Simply because everything works fine so far with GOS messages and going down the SMS on GOS rabbit hole I stumbled up on a lot of posts where SMS problems seem to begin for a lot of users by using other third party apps.

Thanks again for replying and keeping the thread alive.

Kamika242

xr4y I tried the current version from aurora (v2026.18.3)

Very strange! I have installed exactly this version too and with this one the login worked again.
I hope the problem soon will also be solved for you!