What are the possible reasons to get APNs responses BadDeviceToken or Unregistered?

Question

When sending notifications to iOS users, for some of them I get response status code 400 (BadDeviceToken) or code 410 (Unregistered).

From Apple documentation about \"Ba

Answer 1

Error code 404: BadDevice token

Posssible reasons:

1. Your .pem certificate may be wrong.
2. Your BundleId may be wrong.
3. Your Device id may be wrong.

Note: Append .voip with your bundleid for sending voip push notification(exmple: bundleid.voip)

Here is an workable example of voip push notification :

 $url,
        CURLOPT_PORT => 443,
        CURLOPT_HTTPHEADER => $headers,
        CURLOPT_POST => TRUE,
        CURLOPT_POSTFIELDS => $message,
        CURLOPT_RETURNTRANSFER => TRUE,
        CURLOPT_TIMEOUT => 30,
        CURLOPT_SSL_VERIFYPEER => false,
        CURLOPT_SSLCERT => $cert,
        CURLOPT_HEADER => 1
    ));
    $result = curl_exec($http2ch);
    if ($result === FALSE) {
      throw new Exception("Curl failed: " .  curl_error($http2ch));
    }
    // get response
    $status = curl_getinfo($http2ch, CURLINFO_HTTP_CODE);
    if($status=="200")
    echo "SENT|NA";
    else
    echo "FAILED|$status";
}
?>