If you want to do a land based or island hopping tour, it’s possible to have internet access in the hotels and in different restaurants located in the towns on San Cristobal Island, Santa Cruz Island, and Isabela Island. However, connections are often slow and it will not be possible to use WiFi while on board the daily yacht tours.
Regarding cruises, most destinations are too far from the main towns to receive efficient signals for internet use. However, close to the inhabited Islands you may have better signal. It is important to know that just some cruises offer internet service with a slow satellite connection, and some will charge a fee for this service.