Does a wife become divorced by the words "You are divorced" without the intention of divorcing her, but rather with the intention of joking and imitating a TV series, and that during a phone call?

An explicit divorce takes effect regardless of intention, whether the husband is serious or joking, unless the husband utters it in imitation of someone else's words and does not intend divorce by it; in that case, it does not take effect. Nevertheless, one must be cautious about imitating such words.