I gave my sister an old phone of mine which I forget. This phone was connected my google account.

[Belle2]

I gave my sister an old phone of mine which I forget. This phone was  connected my google account.

[Jonas · Accepted solution]

Hi @Belle2,

This should not cause any troubles. Your sister should be able to remove your Google account from your old phone and add her own Google account and continue to use it as normal.

To remove the Google account go to Settings > find the text "Accounts" > tap on Google > 3 dots > Remove account.

Let me know if that helps!