The nearest main mast near me is Parapanda, a mountain that sits directly north of the village of Alomartes. I’ve no clear line of sight to this, unless I walk about 100 metres up the hill near my house. No idea on the GPS location unfortunately jurdyr.
The nearest mobile phone masts that would give me 3G or better, are between Huetor Tajar and Loja along the A-92 autovia, which although I have line of sight to these, I’m far away enough that I can no longer get 3G coverage. Only GPRS at about 2 to 3 bars signal strength at my house now.
I would assume that the main antennas at Parapanda is run and maintained by Telefonica/Movistar and the same with the mobile masts locally too.