Yes, phone reception is available in most of the places during the trek.  Likewise, WIFI services are also available on the trail. To use WIFI services, you are expected to pay a fee. These fees increase as you scale up the higher altitude. Usually, the cost of WIFI services ranges about NPR 400-500 each depending upon the location you are staying in. And another option to stay connected with your family back home is by using an internet data package if you have a local SIM card. You can buy a SIM card around the street of your trip hotel in Kathmandu/Pokhara or ask your guide to arrange it one for you. However, we must inform you that internet service may not be strong in all places.