Mobile signal

We have a holiday home in La Fiesta II. We have a problem with getting a mobile signal indoors and in the garden. When we do manage to get a signal it only lasts for a few seconds. We really need to be able to use a phone indoors. We want to change our provider - we have Hits which uses Vodafone - but don’t know which company to switch to. We only need a basic plan. Does anybody living in this area have a good mobile signal, if so which provider do you use. Thanks in advance.

Forget Vodafone, we were out at our place in La Fiesta 2July/August and the signal strength was shocking.
A friend who lives in Spain informs me that he always has problems when up in our area. Our grandkids use Moviestar which is a bit better,

We live in La Fiesta II and always had signal problems until we changed to Lobster. No problem at all now.

Thank you. Lobster uses the Movistar network. Whereabouts are you we are in one of the ‘Isla de’ roads so fairly low down not right up the top.