I just saw an interesting article with things to keep in mind, if you have corporate numbers in Spain and want to use Mobile Number Portability (MNP) to move your numbers to a different operator. The article is in Spanish, though. It’s from July 2012, but I’m sure it’s still valid all way through. Here goes the link: Portabilidad móvil: ¿Cómo funciona?
Corporate Spanish MNP experience
