Appium start other activity which is not launch activity

I want to start second page activity direct without starting launch activity.
Like my scenario is first I insert mobile number then I will receive OTP message this is my first test case.
second, with that OTP I want to start second test but I want to start from second page direct not want to start again from register mobile page.
So please help me how can I open direct insert OTP page without opening first page.