This study by GSMA Intelligence assesses the total cost of ownership and finds how mmWave is a cost-effective and competitive deployment strategy across different countries and deployment scenarios.
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https://assets.qualcomm.com/economics-of-5g-mmwave-pdf.html?aliId=eyJpIjoiSFRkOElobHJsdXlxUDRQcyIsInQiOiIzWWxVMUV3Y25cL0Z5dmRBWDZ0VVJOdz09In0%253D
