Hey @krsj ,

Are you asking for permission before calling Purchases.collectDeviceIdentifiers()? Once a device identifier is set for a subscriber, it can't be changed. This is done in order to keep these identifiers associated with the original installation. This allows RevenueCat to send events generated by a particular device to downstream integrations with a consistent identifier unaffected by uninstalls and reinstalls. If you are trying to get that IDFA, I recommend calling the method after consent is given to ensure that you are saving the idfa as access is granted otherwise it will stay as it was initially set. 

​@Michael Fogel so does that mean we shouldnt set the IDFA if the user does not authorize the ATT consent? 

I have an issue where the idfa is sometime a real value and some times its all 0s when the ATT is authorized.. For the customer even which has the IDFA as 0s, I dont see the facebook integration event sent at all. I can see the customer has the facebook anon id and idfv value. 

This is for my iOS app and I configure the sdk and the idfa in the App class init function

 

init() {
        Purchases.configure(withAPIKey: Constants.REVENUE_CAT_API_KEY)

        // Automatically collect the $idfa, $idfv, and $ip values
        Purchases.shared.attribution.collectDeviceIdentifiers()

        // REQUIRED: Set the Facebook anonymous Id
        Purchases.shared.attribution.setFBAnonymousID(FBSDKCoreKit.AppEvents.shared.anonymousID)

        // disable automatic tracking
        FBSDKCoreKit.Settings.shared.isAutoLogAppEventsEnabled = false

        // optional: call activateApp
        FBSDKCoreKit.AppEvents.shared.activateApp()
}

Hey ​@john-kim-653ce2 ,

For setting the IDFA, if you are able to, I would wait to set this until you know the users IDFA completely. Once a device identifier is set for a subscriber, it can't be changed in order to keep these identifiers associated with the original installation. This allows RevenueCat to send events generated by a particular device to downstream integrations with a consistent identifier unaffected by uninstalls and reinstalls.