Does the token die on push notifications after deleting the app?

Question

Mobile development

Hello!
I always thought that if the application is deleted, then the token for sending push notifications is also deleted. However, I recently installed one application that I previously deleted, and it did not request push notifications (I have ios), push notifications come. Is it possible that the developers somehow save the data about the device, the token, and at the time of re-installation, for example, the previously set token and user id are assigned by hardware id (I was automatically logged in immediately after installation)? If possible, what are they doing - any ideas?

Answer 1

A permission situation is possible . You can play it as follows - give the application permissions ( any, the number is also not important ), delete the application - put it again. Permissions will already be in the settings. Now let's talk about the token:
Are you sure the token has survived? How did you define it? If you use Firebase then it prints out the token, have you seen the same numbers?
The token could change, but the mailings could remain for various reasons (without logging in, they determined your parameters and subscribed to the push streams from the last session, but the token was changed at the same time).