My newly minted SFR fibre worked happily away during the nationwide outage, whereas my Reglo phone (using SFR) would only allow emergency calls.
I got a message 11.30 today apologising and offering me 100Gb - I’ll receive a message next giving details.
Still waiting…
We had orange mobile service and it was pretty good. SFR had zero signal anywhere in the village so now it seems to have changed?
Do companies swap areas they control between providers?
It’s likely that SFR has installed a new Cell Tower in your area. Alternatively, they piggybacked onto another Operator’s Network to get coverage - Le partage de réseaux mobiles.
I look up the cell tower app to see which aerial we are receiving from as I know the relative positions but no aerials showing at all this trip and signal is well down.
OH received his message yesterday morning… I received my message yesterday evening… 
I think SFR is performing maintenence across France. We in Cholet experienced issues yesterday,but today is OK. When I look at that map it looks like the cities are changing .
We have not suffered any breakdown in SFR service here in 23, as far as I know, but SFR sent us a bonus 20Gb data boost as an apology anyway.