3G — Third-generation mobile telecommunications

Key technical characteristics

Compared with 2G, 3G introduced higher throughput, improved spectrum efficiency, and support for simultaneous voice and data. Multiple radio access technologies met the 3G goals: for example, WCDMA and its later enhancements, CDMA2000, and HSPA family upgrades. These standards combined link‑level changes with core network evolution toward packet switching and better Quality of Service for data applications. For a summary of related standards and documents see standards.

Typical services and uses

• Mobile broadband for web browsing and email.
• Video calls and rich messaging services.
• Location‑based services, mobile banking and early smartphone apps.
• Tethering and portable hotspots to share connections with other devices.

History and development

The 3G concept was formalized around global initiatives to meet the IMT‑2000 goals and was rolled out commercially beginning in the early 2000s. Different regions and operators adopted variants and incremental upgrades (commonly called 3.5G or 3.75G) that boosted speeds and latency before the widespread transition to 4G. For an overview of the evolution to later generations, see 4G.

Legacy and distinctions

3G is remembered for transforming phones into practical internet devices and enabling a generation of mobile applications. It differs from earlier generations by prioritizing data services and from later 4G/LTE by having lower peak data rates and higher latency. Elements of 3G networks remained in use alongside newer technologies to provide coverage and compatibility for many years. Technical summaries and further reading are available at technology references.