Real-world stories from the Private Cellular Network ecosystem — the challenges Enterprises and operators faced, how they were solved, and the results. Drawn from deployments and device interoperability work across the ODA community.
Solving P5G Attach - Apple C1 Devices Apple's move to its in-house C1 baseband modem, replacing the Qualcomm modem used in previous devices, changed how the newest devices negotiate their PDCCH control-channel configuration on Private 5G SA networks. In Private 5G deployments, the iPhone 16e and iPhone Air would not attach, while Qualcomm-based handsets on the same network connected normally. The root cause was a single CORESET parameter that the C1 modem interprets more strictly than its predecessors. In order to allow for C1 devices to attach, a change to the RRC configuration was possible on the gNB to adapt to the Apple C1 modem expectations. Once this change was made on the gNB, no device firmware, SIM, or hardware modification required.
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