OWASP finally released Mobile security guidelines:
click link below:
https://www.owasp.org/images/0/04/Security_Testing_Guidelines_for_mobile_Apps_-_Florian_Stahl%2BJohannes_Stroeher.pdf
click link below:
https://www.owasp.org/images/0/04/Security_Testing_Guidelines_for_mobile_Apps_-_Florian_Stahl%2BJohannes_Stroeher.pdf