On 7 November 2007, Opera Mini 4 was released. According to Johan Schn, technical lead of Opera Mini development, the entire code had been rewritten.[22] Opera Mini 4 includes the ability to view web pages similarly to a desktop based browser by introducing Overview and Zoom functions, and a landscape view setting. In Overview mode, the user can scroll a zoomed-out version of certain web pages.[23] Using a built-in pointer, the user can zoom into a portion of the page to provide a clearer view; this is similar to the functionality of Opera's Nintendo-based web browsers. This version also includes the ability to synchronise with Opera on a personal computer.[24][25]Prior to Opera Mini 4, the browser was offered in two editions: Opera Mini Advanced for high-memory MIDP 2 phones, and Opera Mini Basic for low-memory MIDP 1 phones.[26] Opera Mini 4 replaced Opera Mini Advanced.[27] Originally, Google was the default search engine on Opera Mini.[28] On 8 January 2007, Opera Software and Yahoo! announced a partnership to make Yahoo! search the default instead.[29] On 27 February 2008, Opera Software announced that Google would henceforth be the default search engine for Opera Mini and Opera Mobile.A version for the Android operating system was announced on 10 April 2008. Rather than port the code to Android, a wrapper was created to translate Java ME API calls to Android API calls.[30]