"2G" denotes the second generation of mobile telecommunications technology, which introduced digital signal processing and data services. This generation marked a significant improvement over previous analog systems by enabling better voice quality, increased capacity, and SMS (Short Message Service). 2G technologies, such as GSM (Global System for Mobile Communications) and CDMA (Code Division Multiple Access), also laid the groundwork for future advancements in mobile communication, leading to the development of 3G, 4G, and beyond.