how can i update my o+ grande to the latest os?

[AC Question]

when i click for the games @ messenger. it always appear that "update to the latest os and try again"

 

[SpookDroid]

An OS update is only possible if the manufacturer has released an update for it. If there is no official update, then your only option is to get an updated ROM built specifically for your model (this is not as easy as updating from the Settings and requires you to root and flash your device with the modified ROM).