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How to know 5G network type from code in iOS?
 let networkInfo = CTTelephonyNetworkInfo()     let carrierType = networkInfo.serviceCurrentRadioAccessTechnology     guard let carrierTypeName = carrierType?.first?.value else {         return "UNKNOWN"     }     switch carrierTypeName {     case CTRadioAccessTechnologyGPRS, CTRadioAccessTechnologyEdge, CTRadioAccessTechnologyCDMA1x:         return "2G"     case CTRadioAccessTechnologyLTE:         return "4G"     default:         return "3G"     }
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May ’21