I tried changed the state using the example "internal products review" which
was download from vibe resource library. However, it can only can change the
first state to second state on my iPhone 5, after that, it will changed to
read only and not allow change to other state anymore, but I can continue
change the state on other computer through the i.e. browser.

We want implement some workflow which allow our sales manager can do some
approval through their mobile, anyone can help to solve this problem?