I tried MMS today and they work, no delays but I have the message duplication problem with both SMS and MMS.
When sending SMS, sometimes duplicate or triplicate SMS are sent. The receiver gets the multiple messages, they’re not just duplicated in chatty.
Receiving SMS has a delay up to 1 minute (didn’t test it much, just a couple messages.)
Sending MMS works, but the chat window shows the sent MMS not only as the message that came from me (on the right side) but as an incoming messags from myself (on the left side). So 2 messages with the sent MMS are shown.
Receiving MMS works, I get only one message and can open the attached picture fine.
The bigger problem is still with calls. Incoming calls usually don’t work, the caller gets a “number unavailable” and I get a SMS notification from my provider about a missed call. That happened 3 times in a row when testing today, during which time the notification SMS came in, so the modem wasn’t asleep at least for the SMS, but calls were still unavailable. After I called out (which worked fine) incoming calls started working (at least the 1 time I tried it immediately after the outgoing call).
The audio issue still persists. When cell signal is marginal, call audio will be completely missing from the beginning of the call or will cut out in the middle and not come back. Even the dial tone will cut out. If I stand in a spot that I know has good signal and stay still, I get perfect call audio every time. If I start to move, I get audio cut out, probably when I get into orientations or locations where signal is weaker.
I don’t live in a weak signal area. I always have at least 2/4 bars, usually 3/4. Other phones in the same location have no problem getting a strong signal. Data works fast in this location. There’s always 4G.
I posted my modem versions here Crimson image testing thread II - July 2025 - #8 by jjakob