{"footnote":"\u003Cp\u003E  Android\u0026rsquo;s very rapid growth can mostly be attributed to the fact that the operating system is free for manufacturers to license. Previously, a handset-maker such as Nokia either had to develop its  own software or pay large sums to use software developed by another company, such as Microsoft. In fact, Android is what is known as \u0026lsquo;less than free\u0026rsquo;, since manufacturers get an undisclosed  percentage of Google\u0026rsquo;s ad revenue from phones Android is installed on.\u003C\/p\u003E\n","audio":[],"video":[]}