Contact the MEO Helplines and explain the situation to customer support, they will help you find out if you can combine your mobile phones with the MEO package, with no penalty, and even place your request.

@Tmoney 
More info

MEO, Skillfully employees “falar com assistente” ( talk to an assistant ) and sometimes press nº 9 on the smartphone

At this moment in time can be or not to be a wise choice In adding phones to make M4O?

You can tell the assistant that your moving from one city to another because the higher/lower standard of living and need a better price/help (retired couple?) in the beautiful country of Portugal with smart people.

Bonne chance
jose