With the ESP32-P4 not having any wireless functionality and instead focusing on being a small SoC, it makes sense to combine it with a second chip that handles features like WiFi and Bluetooth.
XDA Developers on MSN
Someone made a 4G ESP32 smartphone, and it's as impressive as it sounds
The source code is coming soon.
Abstract: This paper presents the design, simulation, analysis and characterization of a heterogenous 3D integration approach for miniaturization of RF front-end modules. The 3D integrated stack ...
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