Any of those comments on the phone would work. As for the differences between the sentences in your title, it's a question of straightforward elementary grammar: 'I have missed you' (present perfect) - This is talking about the period from the time we parted until now. 'I missed you' (past simple) - I missed you during the time that we were apart. I don't miss you now, because we are together again or back in contact. 'I miss you' (present simple) - This is talking about now.