Yoigo

I have an iPhone and needed a SIM card that would be approximately $ 20 for text and a local number. I was directed to Yoigo (the closest phone company to me) by a friendly local business man.
I asked for the SIM card and she provided me with a list of option. I took «La del Ocho» or The 8 One. For $ 30 euros I got high speed internet, al local number 633 751 043 (which if you give them my number you will get 5 euros in credit and I will get one too for the referral.
The service was similar to TMobile «Pay as you go», the coverage was good and I traveled from Madrid to Zaragoza and then to Costa del Sol by car. I was able to use my GPS (invaluable) while driving and call to make hotel reservations.
Because I had access to the internet, I was able to use email, Unilocal,Skype and Facebook the whole time. In the past I used other companies like Orange and WIFI services (expensive in Spain) but it was quite frustrating since it’s not high speed and it often drops.
I still have 7.50 euros in my account will allows me to keep the phone number for another month (the minimun use is 6 euros) and after that I can keep the number as long as I pay the minimum. It turns out that it also works in the US. This is great since I will be back in 3 month. I will be keeping this number for my next trip.
They lost a star because I had to cut the SIM card myself to use it on my iPhone 4 (mini SIM) and the high speed internet ended after 15 days. Ideally I would have coverage until the end of the month. But, I still have call and text for 8 centimos. If you will be in the area, give them a try and post a review. Of course, if you give them my number and get the credit, please send me a note.
Cheers and safe travels!