Networks in Spain

[NadineRuth]

Hey people, I did search past answers and the site but there's nothing more recent than 2022 so please forgive what I know must get asked a lot. 

I'm in Andalucia in Spain, right on the Portuguese border. Can anyone advise which is the correct (or best) network to connect to?

Automatic selection comes up with nothing at all, manual selection a whole list of networks that I can't seem to register with 

Any thoughts?

[Cleoriff]

@NadineRuth 

I had an apartment on the Costa del Sol and the network I always connected to was Movistar.

I did have a friend who used Vodafone ES.

[madasaf1sh]

I agree with @Cleoriff 

When I worked in Gib and stayed in Spain, it was either Movistar or Vodafone ES all the way..