The technical scheme of single writing method 2 and combined parallel writing method 1 is the same as a whole.
Another question:
An unauthorized invention patent will definitely affect the novelty of your utility model, because the "mobile phone realization" disclosed by the former is the specific lower-level concept of your "mobile device realization", and the lower-level disclosure leads to the upper-level failure to authorize;
Of course, the actual examination of utility models does not go through the actual examination, which means that utility model examiners may not be able to completely retrieve the former, and utility models are easy to authorize; But it is meaningless in the long run, because your scheme is actually not authorized, because if others use you to sue him for infringement, others can use the former to invalidate your utility model.