Of course the process of the rechargeable light level depending on the sunlight. Samsung E1107 calculation based on the average sun luks around 80,000 mobile phone with the time off. Samsung E1107 Crest Solar already has many features. The most important of the E1107 is included in the FM radio, MP3 ringtone, game and as a source of light. Samsung E1107 Crest Solar also has security features such as Mobile Tracker, which automatically gives a warning if the SIM card is replaced. In addition, the false call is also available for emergency purposes.