IonicPush Clarifications

Hi to all, I need to clarify the ionic push service:
1- it use Google Cloud Messaging that is deprecated, so it works yet? And what will happen when google stop deprecation support? Do you have a plan to FCM transition ?
Or it’s raccomanded to use some phonegap FCM plugin?
2- What cost I have to estimate? If I send less than 10k messages/month it’s completely free?
3- What happen when a user change phone? The old one is recognize as off and not counted in messages quota or what?


up :no_mouth: