While some tea houses along the Everest trek route may offer limited Wi-Fi or mobile network coverage, it's essential to be prepared for intermittent or unreliable connectivity. The remote nature of the region means that network access can be inconsistent. It's advisable to inform your loved ones in advance about potential communication challenges and consider this trek as an opportunity to disconnect and immerse yourself in the natural beauty and culture of the Himalayas. It is better and less cost to buy a local SIM card in Kathmandu and use data package from it then using hotel wifi by paying.