Spoke to Asti in Lukla on a daily phone-in at 2pm UK time (7pm Everest time). She's still looking for a sim but no joy so far. She sounds great. It's raining in Lukla so she bought a poncho large enough to cover her and her backpack.
Tomorrow morning they'll head out on foot to Namche Bazaar - a 2 day hike, I'm told.