last week I received the new fairphone4, everything seems to work except following:
I receive text message over GSM min. 10 minutes delayed.
Also I cannot send any text messages, neither with he built in “messages” app, nor with “signal” or any other 3rd party app. (FYI: I always set the default text message apps in android settings when trying another messaging app).
My provider is “congstar” from Germany.
I have bootloader unlocked & rooted fairphone4 (via Magisk).
Is someone else having this issue? Perhaps this issue appears only on unlocked bootloader phones?
I’m a congstar user as well, my FP4 is rooted with Magisk and SMS work without any problems (just sent one to myself using Signal).
This is on a eSIM though, are you using a regular SIM?
Thanks for your response. Yeah I am using the normal SIM not the eSIM.
Just one more question:
When sending via signal app to yourself, signal isn’t sending a text message via SIM card, it is using the signal protocol over Internet, not GSM. So you have a second phone which received the text message? You can turn on “airplane mode” and then enable WIFI only, then try sending a message via signal app. You will also receive the message which proofs that it isn’t using GSM.
Can you confirm, that the “SMSC” is also empty when you enter the code in your phone-app:
If you long press the send button in Signal you can change the sending method. I changed it to SMS before trying.
But just to be absolutely sure, I just sent a SMS message from an old flip phone without internet connectivity (also on congstar) to my FP4 and the other way round. Zero delay either way.
The “SMSC” wasn’t empty when you first asked your question, funny enough, now it’s empty, but still works
deleting the eSIM will “destroy” it, then you have to get a new one.
But by chance I found the cause:
I deactivated the Google carrier services app.
I did not need this app with the SIM card of my girlfriend to send SMS, but I need it to send (not receive) SMS with the eSIM.