What are the speed categories for 5G in different frequency bands?

The correct answer is based on the understanding of 5G technology and its performance across various frequency bands. In the realm of 5G, three primary frequency bands are defined: low-band, mid-band, and high-band (also known as mmWave). Each of these bands supports different speed and coverage characteristics.

The mid-band and high-band frequencies are particularly notable for delivering significantly higher data rates compared to low-band. The range of 100-900 Mbps represents the performance you would expect from mid-band to high-band technologies in optimal conditions. When utilizing 5G networks, users in ideal scenarios can experience speeds well within this range, especially in urban areas where high-band spectrum is deployed.

In contrast, other options provide ranges that are either too low or do not fully encompass the potential capabilities of 5G networks. For example, low-end ranges like those listed in some choices do not reflect the advancements in mobile technology that 5G boasts, particularly with respect to the upper limits of data transmission speeds that high-band frequencies can achieve. Thus, the selection of 100-900 Mbps effectively encapsulates what users might realistically expect from a robust 5G connection across various frequency bands.