AT&T, Verizon, and T-Mobile have agreed in principle to form a joint venture (JV) aimed at reducing U.S. mobile dead zones through satellite connectivity , especially in rural areas and during emergencies when ground networks fail. Here are three of the customer benefits listed by the JV (as highlighted by Droid Life ): Fewer coverage gaps : Will nearly eliminate dead zones in the U.S. currently without mobile service, reaching previously unserved areas. Reliable connectivity in emergencies : Redundant connectivity will become available when existing ground-based networks are unavailable due to extreme natural disasters or other unusual disruptions. Improved network performance : Will give customers more consistent performance and simpler access to satellite services across providers. This will speed up feature updates and improve connectivity for everyone, everywhere.…