An extension of Apple's Reachability to determine the type of WWAN connection.

Reachability+MobileDataConnectionType.swift

//
//  Reachability+MobileDataConnectionType.swift
//
//  Copyright (c) 2015 Stefan Jager
//  Permission is hereby granted, free of charge, to any person obtaining a
//  copy of this software and associated documentation files (the "Software"),
//  to deal in the Software without restriction, including without limitation
//  the rights to use, copy, modify, merge, publish, distribute, sublicense,
//  and/or sell copies of the Software, and to permit persons to whom the
//  Software is furnished to do so, subject to the following conditions:
//
//  The above copyright notice and this permission notice shall be included in
//  all copies or substantial portions of the Software.
//
//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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//  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
//  DEALINGS IN THE SOFTWARE.
//

import CoreTelephony

/**
Different types of mobile data connections.

- Unknown:  The current connection type is unknown.
- GPRS:     Currently connected via GPRS.
- Edge:     Currently connected via Edge.
- ThreeGee: Currently connected via 3G (compiler prevents me from using 3G as the case's name).
- LTE:      Currently connected via LTE.
*/
@objc enum MobileDataConnectionType: UInt {
    case Unknown
    case GPRS
    case Edge
    case ThreeGee
    case LTE
}

/**
Extension of Apple's Reachability to determine the type of WWAN connection.

Be sure to add Reachability.h to your bridging header.
*/
extension Reachability {
    
    /**
    Determines the current radio access technology and returns one of the mobile data connection types.
    
    - returns: The mobile data connection type currently in use.
    */
    func mobileDataConnectionType() -> MobileDataConnectionType {
        switch CTTelephonyNetworkInfo().currentRadioAccessTechnology {
            case CTRadioAccessTechnologyGPRS:
                return .GPRS
            case CTRadioAccessTechnologyEdge:
                return .Edge
            case CTRadioAccessTechnologyWCDMA, CTRadioAccessTechnologyHSDPA, CTRadioAccessTechnologyHSUPA, CTRadioAccessTechnologyCDMA1x, CTRadioAccessTechnologyCDMAEVDORev0, CTRadioAccessTechnologyCDMAEVDORevA, CTRadioAccessTechnologyCDMAEVDORevB, CTRadioAccessTechnologyeHRPD:
                return .ThreeGee
            case CTRadioAccessTechnologyLTE:
                return .LTE
            default:
                return .Unknown
        }
    }
}