The issue focused on telecommunications technology. Apple introduced LTE networking technology in 2010 and updated its iOS software to support it in 2012. The networks were originally designed to handle far greater volumes of data. However, Apple has said it had to use certain caching techniques that require more complex software to handle and are limited in capability. This system allows the iPhone to connect to a cellular network rather than a wireless router or laptop computer used for traditional data streaming or voice calls. Apple blamed Verizon Wireless for deliberately blocking the network and misleading customers