here is a list of places where I found, and did not find, WIFI on my May-June Primitivo Camino- ma it help
@Gaetan De Waele
Oviedo: a non issue, available in cafes, restarants, pensiones such as pension Oviedo and Romero.
Escalmpero: at the local bar, not at the albergue.
At the bar in Penaflor.
At the Autobar hotel on Grado.
In Cornellana I haven't tried, but there are many restaurants, it must be available in some.
Salas: albergue La Campa, bar Luisa and reataurant Pachon.
Tineo: not at the muni albergue, Marer Christi, but at the albergue in the elegant hotel.
Campielo: on the terrace in front of Herminia's shop.
Not at all in Borres, not the bar, nor the albergue.
Berducedo: at the large restaurNt open for pm and evening. Not at the ,unimalbergue.
Grandas: at the hotel on the dam
Castro: albergue juvenil
On the way down the hill, after the ruins, at the reataurant owned by a man from Argentina (el acebo?)
A fonsagrada: any of th two private albergues
Cavado: nt at the albergue but at the bar at the bottom of town facign the route out
Castroverde: not albergue but at the lovely bakery on the main or one of the larger restaurants to the left at the top,of the main ( the first one, on the right, with barrels outside has a super combinado for 5€).
Lugo: everywhere
San Roman: private albergue and the bar before getting to it.
As seixas, not the albergue, and connection at the only restaurant in town is super bad.
After that you are on the Frances, and WIFI is everywhere.
@Gaetan De Waele , have a wonderful experience. May this info allow you to put your parents at peace.