I received my Mudita Kompakt a few days ago and I’m still in the evaluation phase, but so far, so good!
Since I live in a remote area, I don’t have mobile coverage at home and have been relying on a landline until now. As the Kompakt supports VoWiFi, I’m trying to make it work.
At this point, I’m able to make and receive calls over Wi-Fi, and I can also receive SMS messages. However, I’m unable to send SMS over Wi-Fi. Has anyone here managed to do this?
I’m using the stock apps, and when I try to send an SMS over Wi-Fi, I instantly get a “Failed to send!” message with no additional details.
I contacted my provider and they confirmed that my SIM settings should allow me to send SMS over Wi-Fi. This makes me wonder whether it might be a limitation of the phone or the messaging app itself. I couldn’t find any reference to SMS over Wi-Fi in the settings, could that be the reason?
@urszula Could you also please check this with tech support?
If WiFi Calling is enabled and your cellular operator supports is, you should indeed be able to SMS over WiFi as well. Is it possible to sideload a different SMS app to rule out the stock SMS app (or conclude that that’s the root cause)? You could for instance sideload F-Droid and within F-Droid try Quik SMS: QUIK SMS | F-Droid - Free and Open Source Android App Repository
Hey Marco, thanks for your answer! Do you use this feature on the Kompakt yourself?
I tried with two third party apps (InkMessage and FOSSIFY Message) but with the same results.
After a few tests, I’m not sure I can even receive SMS over Wi-Fi, as today’s tests were not successful. I also can’t remember whether the previous successes happened with airplane mode on or off so nothing is certain. =(
Anyway, sending SMS over Wi-Fi still doesn’t work, so I guess I’ll call my carrier again.
If anyone is successfully using SMS over Wi-Fi, please chime in so I can eliminate the “phone” variable from the equation!
Router firewall may be the issue. Sending SMS over a Wi-Fi router (Wi-Fi Calling) requires specific firewall settings to allow the phone to establish a secure tunnel to the cellular provider’s network. If these ports are blocked, SMS messages may fail, while normal internet browsing works fine.
I would try sending SMS from a different wifi connection to see if it works elsewhere.
I asked our team about this & they informed me that part of Wi-Fi Calling is actually sending SMS and MMS. If properly configured and supported by carrier. However MMS often still requires cellular signal for this to work.
Thanks for your feedback! I went a bit further: I called my provider’s help desk one more time and went as far as replacing my physical SIM card (because it may have been too old and/or damaged to support SMS over Wi‑Fi, they said). From their point of view everything must be working.
Unfortunately the result is the same: I can make and receive calls over Wi‑Fi with the Kompakt, but I’m unable to receive or send SMS over Wi‑Fi (I’m not talking about MMS here, as I don’t use them).
Fun fact: I put the new SIM in a device that’s officially supported by my provider—the Fairphone 5—for Call/Text over Wi‑Fi, and neither of those works on the said phone . So the Kompakt is the clear winner here!
I’m still interested in the community feedback: if someone is successfully receiving/sending SMS over Wi‑Fi with the Kompakt, it means it’s a problem on my carrier side. But I’m secretly hoping it’s a Kompakt problem so the support team could solve it, then I’m golden…
I didn’t set any APN settings manually, they are automatically set. I verified and they match with my provider’s documentation (one for mobile data, the other for mms).
For what it’s worth, the “Phone Information” hidden menu (Dial *#*#4636#*#* -> Phone information -> Three dots on the top left -> IMS Service Status) shows “Registered” for IMS Registration and Voice over Wifi is marked as “Available”. So everything seems to be OK on this side…
Yes, I noticed/read about Wi-Fi network settingss blocking Wi-Fi calling, but I’m testing on two unrestricted different Wi-Fi networks I’m managing (working in IT helps) so I don’t think it’s related. Thanks for your feedback anyway!
Sorry for the late reply, completely forgot. If disable mobile data, enable airplane mode, enable WiFi, I can send SMS over WiFi and it arrives almost instantly at my sons phone.
Hey Marco, thanks for testing! That settles it then; it’s definitely a problem with my carrier. Good news for the Mudita team, the phone is working exactly as advertised!
@eddie.dean I’m out of ideas at this point.
If you feel like you’ve exhausted all options, I would encourage you to open up a support ticket & contact our tech support. They will most likely ask you to submit logs, so they can assess the problem more closely.
. So the Kompakt is the clear winner here!
