What mobile technology operates at frequencies of 1.6-2 GHz and offers speeds of 144 Kbps to 2 Mbps?

The correct choice relates to 3G technology, which typically operates in the frequency range of 1.6 to 2 GHz. This generation of mobile technology was designed to provide higher data speeds compared to its predecessor, 2G. With 3G, users can experience improved multimedia capabilities, including video calling and mobile internet access at speeds ranging from 144 Kbps to 2 Mbps.

3G technology was significant because it bridged the gap between the basic voice and slow data services of 2G and the much faster connection speeds offered by later technologies such as HSPA and HSPA+. These latter technologies utilize the same fundamental principles of 3G but with enhancements that allow for greater speeds and efficiency. However, they specifically belong to advanced versions of 3G, with HSPA and HSPA+ indicating High-Speed Packet Access and further advancements with even higher throughput rates.

Understanding this tiered structure is essential for grasping how mobile technology has evolved, making it clear why the correct answer identifies 3G as the appropriate choice given the specified frequency and speed range.