Will I maintain an internet signal on Spain's high-speed trains (Renfe/Iryo) with eSIMFlyer?

You'll generally enjoy excellent internet connectivity on Spain's high-speed rail network (Renfe, Iryo) with eSIMFlyer for most of your journey. Spain boasts a strong mobile infrastructure, providing stable 4G/5G signals on routes like Madrid to Seville. However, as with any mobile network, expect brief signal drops when the train passes through longer tunnels or very remote, mountainous regions. For frequent flyers, this means you can mostly stay productive or entertained, but always download crucial documents or entertainment beforehand for those intermittent dead zones.