Make receiving SMS reliable by fixing Modem Manager API design

Pirate Praveen Public Seen by 9

Introduce and describe the topic

Many people on Purism forums complained about SMS not being reliable due to stuck messages. On community/librem-5 dos explained the issue is with Modem Manager.

This seems like an issue in Modem Manager API design issue. ofono and fsmgsd does it correctly.

A fix would be "either introduce some persistent storage of chunks, or design and API that lets an external process handle and acknowledge CSM as they arrive without buffering on SIM."

https://forums.puri.sm/t/librem-5-receive-sms-fail/19725/4

Why is this important?

Being able to receive SMS reliably is crucial for a phone.

How would you like people to respond?

We should try and fix this in Modem Manager.