To All , those who are facing challenge to log into the game due to the error,," suspicious activity detected.,"" please follow this simple work around .
Open the game and while the game is launched , keep switch off and switch on your mobile internet or wifi for few times may be 4 to 5 times and then just leave the game idle then you will be able to login ..
it's worked for me everytime I want login to game. As of now this is the only way I see, if you find any better way please let me know as well.
Also comment if the above process helps you