I don't know for the data, but I pay 8 times less (! 25p/min vs 3p/min) to call a mobile in foreign country than another mobile locally in the UK and only 2 tim

I don't know for the data, but I pay 8 times less (! 25p/min vs 3p/min) to call a mobile in foreign country than another mobile locally in the UK and only 2 times cheaper when making call in a foreign country. I never really understood, that's just a pay as you go sim from a big player, yet it is cheaper to call a Spanish mobile in Spain with my UK mobile than the Pay as you Go rate from the same operator in Spain.