Yes and no. The built-in firewall effectively blocks pretty much everything except what's whitelisted. So on the settings portal you choose the sites you want t

Yes and no. The built-in firewall effectively blocks pretty much everything except what's whitelisted. So on the settings portal you choose the sites you want to access and they will download a super compressed version for you. Now to get non-whitelisted sites you can install Opera Mobile. The browser that compresses sites for you. I should have done this before our transatlantic but you live and learn. Supported sites are basically weather sites. During our transatlantic I basically used weather 4D and passageweather. Now to your first question you need the Iridium Go app to initiate the connection. Once online any wifi connected device may use it.