Starting July 1, 2019, it's likely that WhatsApp is no longer available in the Microsoft Store. This means that Windows Phone mobile phones will no longer be able to download the app from this store.
It should be noted that since the application no longer develops for these operating systems, it is possible that some functions will stop working properly.
In turn, the following platforms will no longer be able to create new accounts or re-verify existing profiles. However, if you already have WhatsApp, you can continue to use it until the following dates:
In the case of Android with operating system 2.3.7 or earlier, and iPhone with iOS 7 or earlier it will have this tool by 1 February 2020.
What you can do with the app is to choose to receive the chat history via email or otherwise. For this, you must enter the Settings by pressing the three points in the upper right margin, then go to Conversations / Conversation history / Chat export and select all the conversations you want to keep.