If you want to know that coverage is your mobile operator and what type of coverage using the OMV or virtual operators in Spain here I am going to explain and update time.
Coverage for mobile give us 3 operators, and the rest use the mobile network of large and I have ordered as they give more coverage for less. I have also included Virtual Mobile Operators (OMV) who use their networks.
Remember that even There OMV's not using 4G coverage and only use 3G, so set well before deciding.
Coverage Map MOVISTAR
OMV's coverage using Movistar:
Pepephone (until 2018) Tuenti Lycamobile
Telecable (movistar switched to the middle of 2017, still has vodafone)
VODAFONE Coverage Map
OMV's using Vodafone coverage:
Lowi Ono Eroski Mobile
ORANGE coverage map
OMV's who use Orange coverage:
MasMovil Jazztel Simyo Mobile Happy LlamaYAMóvil suop Amena
Yoigo, coverage map (his own + Orange)
R (in the middle of 2017, is still with vodafone) Jetnet Carrefour Mobile
If you want to know what is a Comparison of all coverage of each mobile operator on a map, You can see it on the map in real time Opensignal or your Android app: