Which statement is NOT true about wireless technologies?

The statement that high data speed wireless technologies also offer greater coverage area is not true. Generally, as wireless technologies increase in data speed, the coverage area tends to decrease. This is due to several factors, including higher frequencies being used for faster data transmission, which often have a shorter range compared to lower frequencies. For instance, WiFi can provide high data speeds, but it does not cover as large an area as cellular networks, which typically offer lower speeds due to their broader coverage capabilities.

In contrast, the first statement accurately notes that different wireless technologies operate on distinct frequency bands, which is essential for minimizing interference and optimizing performance across varying applications. The second statement correctly identifies that WiFi, while capable of high speeds, typically has a smaller coverage footprint compared to cellular networks, reinforcing the principle that increased speed does not equate to larger coverage. Finally, the option stating "None of the above" would imply all previous statements are true, which is not the case since the third one is indeed inaccurate.