The solution depends on the type of phone you have. If you have an iPhone, you're best off to make an appointment at an Apple store, and inform them of the situation. If you have an Android phone, it is generally possible to put the phone into recove...
By locked out of your account, do you mean that you have forgotten the password? If so, you should be able to press the "Forgot your password?" link, located directly below the Log In button here.