通用移动通讯系统（Universal Mobile Telecommunications System，缩写：UMTS）是当前最广泛采用的一种第三代（3G）移动电话技术。它的无线接口使用W-CDMA技术，由3GPP定型，代表欧洲对ITU IMT-2000关于3G蜂窝无线系统需求的回应。

UMTS有时也叫3GSM，强调结合了3G技术而且是GSM标准的后续标准。UMTS封包交换系统是由GPRS系统所演进而来，故系统的架构颇为相像。

The Universal Mobile Telecommunications System (UMTS) is a third generation mobile cellular system for networks based on the GSM standard. Developed and maintained by the 3GPP (3rd Generation Partnership Project), UMTS is a component of the International Telecommunications Union IMT-2000 standard set and compares with the CDMA2000 standard set for networks based on the competing cdmaOne technology. UMTS uses wideband code division multiple access (W-CDMA) radio access technology to offer greater spectral efficiency and bandwidth to mobile network operators.