Usage of IsSIMInserted in iOS 18

Question

Created Jul ’24

Replies 2

Boosts 0

Participants 2

I am developing an iOS application where I need to detect if a SIM card is inserted in the device(either physical / eSim). I am targeting iOS 12 and later. I have tried using CTTelephonyNetworkInfo and CTSubscriber, but I am encountering issues with permissions and API availability in iOS 18 beta 3.

        if #available(iOS 16.0, *) {
            let subscriber = CTSubscriber()
            if #available(iOS 18.0, *) {
                do {
                    if subscriber.isSIMInserted {
                        return "SIM card is inserted."
                    } else {
                        return "No SIM card detected."
                    }
                } catch {
                    return "Error determining if SIM is inserted: \(error.localizedDescription)"
                }
            } else {
                return "isSIMInserted is only available on iOS 18.0 or newer."
            }
        } else {
            return "isSIMInserted is only available on iOS 16.0 or newer."
        }
        
        if let carriers = networkInfo.serviceSubscriberCellularProviders,
           let carrier = carriers.first?.value,
           let _ = carrier.mobileNetworkCode {
            return "SIM card is available.\nCarrier Name: \(carrier.carrierName ?? "None")"
        } else {
            return "No SIM card installed"
        }
    }

in iOS 18 it always returning No SIM card detected.

XCode Version 16.0 beta 3 (16A5202i) iPhone OS: iOS 18.0 (22A5307i)

is there anything did I miss? or any documentation for the implementation would be helpful.

Thanks

Answered by DTS Engineer in 796408022

if the new sim is same network provider then i am not getting triggered. Is this expected?

Yes. The old API has a number of oddities, including:

You don’t get an event when the SIM is removed. The API ‘latches’ the state of the SIM.
When a new SIM is inserted, you only get an event if the new SIM is from a different provider.

Regarding the new API, let’s focus that discussion over on the other thread you found.

Share and Enjoy
—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"

Boost

Answer 1

iamVariable OP

Jul ’24

In addition, in iOS 12 to iOS 15, try detecting sim change using the following code,

                guard let self = self else { return }
                let simStatus = self.checkSimAvailability()
                
                DispatchQueue.main.async {
                    self.infolabel.text = "System OS : \(self.systemVersion) \n\n \(simStatus)"
                    self.showSimChangedAlert()
                }
            }

if the new sim is same network provider then i am not getting triggered. Is this expected? whereas if new and old sim are different provider yeah this function triggers as expected. Please consider this question as well. thanks in advance.

0

Answer 2

DTS Engineer OP

Apple

Jul ’24

Accepted Answer

Recommended

if the new sim is same network provider then i am not getting triggered. Is this expected?

Yes. The old API has a number of oddities, including:

You don’t get an event when the SIM is removed. The API ‘latches’ the state of the SIM.
When a new SIM is inserted, you only get an event if the new SIM is from a different provider.

Regarding the new API, let’s focus that discussion over on the other thread you found.

Share and Enjoy
—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"

0