ソース:[1] AT&T-EchoStar spectrum purchase - Verdict (https://www.verdict.co.uk/att-echostar-spectr ...)[2] AT&T to Acquire Spectrum Licenses from EchoStar - PR Newswire - Latest Market News - The M&A Advisor (https://vertexaisearch.cloud.google.com/groun ...)[3] EchoStar Announces Spectrum Sale and Hybrid Mobile Network Operator (MNO) Agreement, Steps Toward Resolving Federal Communications Commission's (FCC) Inquiries (https://vertexaisearch.cloud.google.com/groun ...)