What is the ruling on one who swears an oath of divorce with the intention of preventing or threatening his wife, and does a divorce occur thereby?

You have not broken your oath because intention is taken into consideration, and you intended that you did not own another phone from which to speak to her, and you were truthful. Therefore, no divorce or expiation is incurred upon you. Ignore the whispers and occupy your time with what is beneficial for your religion and your worldly life.