iPhone Push Notification on 4.0 OS

Question

Hi,

didRegisterForRemoteNotificationsWithDeviceToken delegate method gets called quickly on 3.0OS devices, so that we are able to get the devices token immediately after launching the app, but on 4.0 devices the same delegate method takes time to get called, so that we are not able to make call to the server with the device token appended in the url. We have to wait till the delegate method gets called.

is anyone facing the same issue, is there any work around for this, or is there anything we need to do to get the delegate method called quickly on 4.0 OS, Please Help Me!.

Note: We tried the same app(build) on 3.0 and 4.0 OS devices. In 3.0 it gets called immediately, in 4.0 it takes time.

Thanks in advance !