Anyone in france and has a mobile phone with La Poste?

[Beatles19]

I am looking to update my mobile phone and I find it all a bit daunting.
I was wondering if anyone has done this with La Poste and if it was easy and uncomplicated.
Many thanks

Sorry not la Poste - I'm with SFR. If you are rural I suggest you check out with friends/neighbours to make sure the reseau works near you. We are with SFR for the simple reason they are the only operator that works well in our village.