(eSIM Integration iOS) How to use restricted API "addPlan" to enable e-sim profile in iOS device

With this process, you can integrate eSIM functionality into your iOS app.

Step 1

Request for eSIM entitlement using your developer account Request from here

Step 2

Apple will approve the entitlement after some time (For me it took months) You can check if Apple has approved the entitlement from your app profile setting

Step 3

Download the App Dev and Distribution profile (By selecting eSIM entitlement as Step #2).

Step 4

Update your info.plist with below keys and value

<key>com.apple.security.network.server</key>
<true/>
<key>com.apple.security.network.client</key>
<true/>
<key>com.apple.CommCenter.fine-grained</key>
<array>
    <string>spi</string>
    <string>sim-authentication</string>
    <string>identity</string>
</array>
<key>com.apple.wlan.authentication</key>
<true/>
<key>keychain-access-groups</key>
<array>
    <string>apple</string>
    <string>com.apple.identities</string>
    <string>com.apple.certificates</string>
</array>
<key>com.apple.private.system-keychain</key>
<true/>

Step 5 (Could be optional)

Update your {appname}.entitlements with below key and value

<key>com.apple.CommCenter.fine-grained</key>
<array>
    <string>public-cellular-plan</string>
</array> 

Step 6 Code to Add eSIM profile

 let ctpr = CTCellularPlanProvisioningRequest()
 let ctpr = CTCellularPlanProvisioningRequest()
 ctpr.address = "Your eSIM profile address"
 ctpr.matchingID = "Confirmation id"

 if #available(iOS 12.0, *) {
        let ctcp =  CTCellularPlanProvisioning()
        ctcp.addPlan(with: ctpr) { (result) in
            switch result {
            case .unknown:
                self.showGenericSingleButtonCustomAlert(description: "Sorry unknown error")
            case .fail:
                self.showGenericSingleButtonCustomAlert(description: "Oops! something went wrong")
            case .success:
                self.showGenericSingleButtonCustomAlert(description: "Yay! eSIM installed successfully")
            @unknown default:
                self.showGenericSingleButtonCustomAlert(description: "Oops! something went wrong")
            }
        }
    }

This API is only available for carriers. You need a special entitlement from Apple to be able to call it in your application, otherwise you will get the error you mentioned.

Just to clarify something about eSIMs; there are several ways to add eSIM to the device:

• the simplest way that most carriers are implementing now is through scanning a QR code from the device settings, which does not require any development work on the carrier's app.
• The other way is to install the eSIM profile using the carrier app, which can only be done with a special entitlement that is provided by Apple. The entitlement allows you to call CTCellularPlanProvisioning.addPlan(with: ) API that you referred to you in your question