APN hard to create

Hello,

I have owned a /e/ OS preinstalled onto a Samsung S9+. It has been complicated to catch the data connection and MMS do not work.

I tried to change the APN settings, but as I saved it, it just disappeared from the list. I also found that, when I create a new one, about only 1 time on 10 it was saved. And when I tried to set the right MNC parameter, it just did not save anything !

I have restored the APN found by default by the OS and now I can connect through the data, but still no MMS can be sent nor received.

I tried with Handcent SMS that sounds to manage the APN settings by itself, but it also does not work.

Please help.

Many thanks by advanced.

B.R.

Eric