Siemens mobile has warned about a software-related defect in its 65 product series (C65, CX65, M65, S65, SL65 as well as all provider variations such as the CV65, CT65, CXV65 and CXT65) which could lead to failures in audio transmission in very rare and unlikely cases of usage.

Because of the software error, if a telephone call is automatically cut off because the battery has run down, the disconnection melody could possibly start to play loudly. In extreme cases, this volume could lead to hearing damage. However, this danger can only arise if the mobile phone is held up directly to the ear while the melody is playing.

Siemens recommends deactivating the disconnection melody or the disconnection animation function.

In addition, the phone call should be terminated as soon as the first "low battery" warning signal comes. To deactivate the disconnection melody, the user must first select the "Setup" item in the menu, then "Ringtones," afterwards "More melodies," and then the "Shutdown melody" can be deactivated by selecting "Switch off".

Siemens has already developed new equipment software that stops this malfunction in the mobile phones in the 65 product series. After approval is received from the network providers, the new update software versions will be provided free of charge in the coming weeks.