You may find that option in bottom-left of your in-game Basic settings. When you tap Log out, you should see an option of ''Logout of all devices''. Tap on that and logout the account.
There are three links in my Gmail account, and the secondary link is an email and the phone number in the Gmail. I am sure that he did not go through it. If that were the case, my phone data would have been deleted. If he did not know, there will be a login notification through the Gmail. As for the email and phone number, I changed the phone number and email and he was able to log in.
Hello dears i have been playing pubg for 5 years my account was hacked i appiled for 2 claims yet i keep getting refused how can i get my account back I have access to all my social network yet the hacker only kept 2 verification code so i cant login to the game
Please make sure that you provide the customer service all the required and accurate information and submit the account recovery request from a device that you use more often to log into that PUBG MOBILE account. If you have already received a response from the customer service and your request was not approved, you will need to submit another request or create a new account to continue playing the game. In this case, we unfortunately cannot help you any further through the community, @Elie.