Download the map and route in advance.
day1: There is no mobile phone reception in the car park or on the climb, only at the refuge (E). There may be a few places with reception
day 2: Same as above. Probably no mobile phone reception anywhere, only at the refuge (E).
All equipment for a two-day hike with one night in a refuge. Bed linen, toiletries and personal care items, a change of clothes, weatherproof clothing (the weather can change quickly in the mountains. For me, it was sunny onthe first day and stormy with rain onthe second day!
Don't forget: 2 litres of water per person, snacks, GPS, smartphone, map or map extract, GPX track provided by Visorando, etc.