Question regarding modem

[walter1950]

I have one question: 

The modem of my phone seems to do everything as it should except for one thing: It does not send text messages (SMS) apart from two cases (out of maybe 50-100 so far). By contrast, receiving messages is not a problem at all.

With the help of friendly people in this forum I found out that it is in all likelihood
-neither a software (Mobian, Ubuntu Touch, Manjaro Plasma)
-nor a firmware issue.

Is there anybody here who knows enough about modems to tell me whether this could be a hardware problem? Or is that simply impossible given that everything works except for sending text messages?

Hello Anton,

I have the same Problem after "updating" the Modem Firmware on 25.08.2021.

Today I have just flashed https://images.mobian-project.org/pineph...004.img.gz
with https://www.balena.io/etcher/?ref=etcher_footer on my SD-Card.

Tested with 2 Mobile Phones:
1.)
PinePhone, OS: Mobian,
Provider: "Medion Aldi Talk" (Germany) <https://www.alditalk.de/produktinformationsblatt>
2.)
Sony Xperia 10 II, OS: SailfishOS from Jolla,
Provider: "Telekom.de" (Germany)

SMS-Tests on Pinephone with different "Network Modes" in "SETTINGS" => "MOBILE" => "NETWORK MODE": Default is "2G, 3G, 4G (Preferred)"

Phone Call in/out works. At least it's ringing ;-)
"SMS send"/"SMS received" (Example: "yes/no")


2G,3G,4G (Preferred)   : Send: NO/Received: YES
2G,3G,4G   : "...unsuported Combination... "blabla"...not allowed.."
3G,4G (Preferred)   : Send: NO/Received: YES
3G,4G   : "...unsuported Combination... "blabla"...not allowed.."
2G,3G (Preferred)   : Send: YES/Received: YES
2G,3G   : "...unsuported Combination... "blabla"...not allowed.."
4G   : Send: NO/Received: YES
3G (3G Icon missing)   : Send: NO/Received: 10 min later! (Modem Details: Network Typ unknown)
2G (2G Icon visible)   : Send: YES/Received: YES (Modem Details: Network Typ "gsm")
(Sorry, I don't get TAB-Spaces working here)

Yesterday I ordered a second Pinephone to exclude Modem Problems.
For Safety Reasons I dont want swapping my SIM-Cards ;-)

Lets see whats happening.


Ciao
Walter