Does anything happen by changing the wife's name on the phone to "ex-wife" due to hesitation in separation?

Divorce occurs with an explicit verbal utterance and does not require intention. If it is written but not verbally uttered, it does not occur unless there is an intention. As for an allusive expression, such as saying "Go back to your family," it requires intention to effectuate divorce, whether it is uttered verbally or written. The phrase "my ex-wife" falls under allusive expressions; if you intended divorce by it, it occurs, otherwise it does not. If a person is asked, "Did you divorce your wife?" and he says, "Yes," if he intended to lie, divorce does not occur, but if he intended divorce, it occurs because it is an allusive expression. The conclusion is that divorce does not occur as long as you did not intend to effectuate it.