a. All of the SAS vendors offer CPI training, and all of them will provide the required information for you to achieve certification to install devices in CBRS. Cambium Networks does not recommend one vs. another. b. Federated Wireless: https://federatedwireless.com/certified-professional-installer/ c. Google: https://www.coursera.org/learn/google-cbrs-cpi-training d. CommScope: https://www.commscope.com/solutions/cbrs-certified-professional-installer/