Re: Mobile providers in Neuchatel
The best coverage is probably Swisscom. Both Sunrise and Salt have areas where the service is a bit patchy. Sunrise reception is rubbish out towards the Marin direction whereas Salt s really strong. Both Sunrise and salt are weak in the Cortaillod/Boudry area with Salt being slightly better than Sunrise.
In Neuchâtel itself the the immediate surroundings all three carriers have strong signals although I found Salt to be better than Sunrise overall. I'm happy with the Salt package I have and was very unimpressed by Sunrise ( due to lack of coverage where I live) but others may have different opinions.
The budget options (COOP, Migros, Aldi, yallo etc) all use one if those three networks so make sure you check which one they use before signing up to them.