how can i remove device to my gmail account??

[Android Central Question]

i actually signed into my officemate phone and he always seen every transaction i maid,,specially in financial,,i care about my privacy with regards to financial so can you please help me to remove it,,i said it already to him to remove it by simply signing out my account but i think he didnt do it.,he always knew every transaction i maid.,help here please..,thanks

 

[Dano1200r]

You need to go to the Google dashboard. You will find his device listed and delete it. Then change every password you have.