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The sixth generation (6G) wireless communication nowadays is seeking a newspectrum to inherit the pros and discard the cons of sub-6 GHz, millimeter-wave(mmWave), and sub-terahertz (THz) bands. To this end, an upper mid-band,Frequency Range (FR) spanning from 7 GHz to 24 GHz, also known as FR3, hasemerged as a focal point in 6G communications. Thus, as an inexorableprerequisite, a comprehensive investigation encompassing spectrum utilizationand channel modeling is the first step to exploit potential applications andfuture prospects of using this FR in the 6G ecosystem. In this article, weprovide FR3 deployment insights into emerging technologies includingnon-terrestrial network (NTN), massive multi-input multi-output (mMIMO),reconfigurable intelligent surface (RIS), and joint communications and sensing(JCAS). Furthermore, leveraging ray-tracing simulations, our investigationunveils the channel characteristics in FR3 are close to those in the sub-6 GHzband. The analysis of RIS-aided communication shows a higher spectralefficiency achieved in FR3 compared to other FRs when using the same RIS size.Finally, challenges and promising directions are discussed for FR3-basedcommunication systems.

6G Wireless Communications in 7-24 GHz Band: Opportunities, Techniques, and Challenges