Using same push token after updating to iOS 11

Hi,


Infrastructure question: A lot of users now start updating to iOS 11. Per Apple's docs it states that push token is changed when device is changing OS version (is it?).

Does it mean that until the user will open the app and receive a new token to send to our server he will not receive a push with the old token? Or is the old token still valid until app is open for the first time and asking to register to APNS?


Thanks