The Siemens C25 is a mobile phone introduced by Siemens in 1999. It weighs 135 g and its dimensions are 117 × 47 × 27 mm (length (without the antenna) × width × depth). Its display is a 3 × 12-character monochrome LCD.
The phone's battery powers the phone for 300 minutes talk time, or up to 160 hours if left in stand-by mode. It is a dual-band mobile phone, supporting both GSM 900 and GSM 1800 network frequencies. It supports up to 21 monophonicringtones. It also supports SMS sending and receiving.