Yes, while Wi-Fi is normally accessible on the Everest Base Camp Trek, its quality and availability might vary greatly depending on where you are.  Along the trail, you may connect to the internet at a number of teahouses and hotels for a certain cost  Luxury treks, on the other hand, only use high-end lodges and hotels known for their consistently excellent Wi-Fi. Some hotels may even provide visitors with their own Wi-Fi cafes or zones.