Get the Cellular network connection type i.e. 2G, 3G & LTE etc.

CellularNetworkConectionType

 // Support iOS 14+
    func getNetworkConnectionType() -> String {

        var connectionType: String = "Unknown"
        let networkInfo = CTTelephonyNetworkInfo()

        let carrierType = networkInfo.serviceCurrentRadioAccessTechnology

        guard let carrierTypeName = carrierType?.first?.value else {
          return connectionType
        }

        switch carrierTypeName {
        case CTRadioAccessTechnologyGPRS, CTRadioAccessTechnologyEdge, CTRadioAccessTechnologyCDMAEVDORev0:
            connectionType = "2G"
        case CTRadioAccessTechnologyWCDMA, CTRadioAccessTechnologyHSDPA, CTRadioAccessTechnologyHSUPA, CTRadioAccessTechnologyCDMAEVDORevA, CTRadioAccessTechnologyCDMAEVDORevB, CTRadioAccessTechnologyeHRPD, CTRadioAccessTechnologyCDMA1x:
            connectionType = "3G"
        case CTRadioAccessTechnologyLTE:
            connectionType = "LTE"
        // We can enable these when we support from iOS 14+
        //case CTRadioAccessTechnologyNR, CTRadioAccessTechnologyNRNSA:
            //connectionType = "5G"
            
        default:
            return connectionType
        }
        return connectionType
    }

    
    // Supports iOS 10+
    func getNetworkConnectionType() -> String {
        
        var connectionType: String = "Unknown"
        let networkInfo = CTTelephonyNetworkInfo()
        let carrierType = networkInfo.currentRadioAccessTechnology
        
        switch carrierType {
        case CTRadioAccessTechnologyGPRS, CTRadioAccessTechnologyEdge, CTRadioAccessTechnologyCDMAEVDORev0:
            connectionType = "2G"
        case CTRadioAccessTechnologyWCDMA, CTRadioAccessTechnologyHSDPA, CTRadioAccessTechnologyHSUPA, CTRadioAccessTechnologyCDMAEVDORevA, CTRadioAccessTechnologyCDMAEVDORevB, CTRadioAccessTechnologyeHRPD, CTRadioAccessTechnologyCDMA1x:
            connectionType = "3G"
        case CTRadioAccessTechnologyLTE:
            connectionType = "LTE"
        default:
            return connectionType
        }
        return connectionType
    }