Hi
I use FP3+ and MMS was working well for about a month but since august last year I can’t send/receive any
APN setup is correct.
Provider : free
I’ve seen a post with Adaway but my phone is not rooted, would this option work or is there any other (simplier) option ?
Regain your privacy! Adopt /e/OS the deGoogled mobile OS and online services
Something that could looks dumb but happened to me is that your message app is trying to sendd mms in a too huge resilution for your network. Check your sms app settings to be sure that auto-compress mms is set on automatic. Otherwise it just won’t work. If it doesn’t work and you have checked your apn settings then i unfortunately can’t help you 
Good luck !
Thanks VinK3645, I’ve checked and changed settings but it didn’t solve this problem.
ps : I’m not sure whether English or French language is more suitable for this community
Hi @fkt welcome to the /e/ forum/
French is the language used in the French group which you can join by following this link French group.