Disposal of mobile phones can not be seen only as a disposal of an old mobile devices, as it is necessary to dispose all the things that the user receives when purchasing the product; Therefore, accessories such as chargers, headsets, attached paper instructions and cardboard packaging need to be disposed as well. Due to the fact that the device contains components that can have negative impact on the environment if they are disposed uncontrollably, their correct disposal can help to prevent possible negative effects on the environment and human health. Recycling of materials can also help to preserve natural resources. The problem that occurs is a very small percentage of devices that have been returned for recycling, compared to extremely large number of mobile devices whose life span has ended. In order to improve the recycling of mobile devices, cooperation of all parties involved is needed: mobile device manufacturers, telecommunication operators, state institutions and end users. An example of such cooperation are actions implemented by Croatian Telecom. This paper describes the life cycle of mobile devices starting from the bare design of mobile devices all the way to its recycling, while taking into account the good practices of Croatian Telecom.