ints, 5G can be considered as an evolution of LTE-A with minimum impact on existing UE architectures in general. This is the case of frequency bands in FR1, which, with the exception of n79 and n77, are extensions of bands that are already covered in legacy platforms. On the other hand, operation at mmWave, mandatory sup- port of simultaneous dual uplink transmissions, and UL MIMO are features that bring major challenges to the RF front-end. The huge physical layer flexibility offers unique opportunities to address a wide range of use cases. The price to pay, however, resides in increasing RF-FE multiplexing/demultiplexing and test time complexity. Even though it is too early to say if all features will fulfill their promises, 5G has certainly created a lot of opportunities for innovations, fueled by several thousand of contributions yearly for 3GPP. Who would have thought that within a one-and-a-half years of 5G standardization work, smartphones would be able to surpass LTE-A complexity and deliver mmWave transmission capability using active phase arrays? References References 1 Sony, RAN4#86. R4-1802868 UE Spherical coverage at mmWave 28GHz. March 2018. NTT DOCOMO Inc., Sharp, RAN4 NR ad-hoc-3. R4-1709394 EIRP CDF for mmWave UE. September 2017. 3 Qualcomm Incorporated, RAN4#85. R4-1712381 Spherical coverage of realistic design. November 2017. 4 LG Electronics, RAN4 #87. R4-1806676 Measurement EIRP levels for spherical coverage of NR UE at FR2. May 2018. 5 Samsung, Apple, Intel, RAN4#84. R4-1711036 Consideration of EIRP spherical coverage requirement. October 2017. 6 Benjamin Jann et al. (2019). A 5G Sub-6GHz Zero-IF and mm-Wave IF Transceiver with MIMO and Carrier Aggregation, IEEE International Solid- State Circuits Con- ference - (ISSCC). 17-21 Feb. 2019. 7 J. D. Dunworth et al. (2018). A 28GHz Bulk-CMOS dual-polarization phased-array transceiver with 24 channels for 5G user and basestation equipment. IEEE Interna- tional Solid - State Circuits Conference - (ISSCC). 11-15 Feb. 2018. 8 Holma, H., Toskala, A., 