Why This Matters
When I first moved to Spain from London, I assumed topping up my phone would be straightforward. Three months and several overpriced transactions later, I realized I was doing it wrong. The difference between methods can be 15-20% in fees, and some options are genuinely faster than others.
I've tested online platforms, bank transfers, retail stores, and even some methods most tourists never discover. This guide shares what I wish someone had told me when I arrived.
Each method below includes real costs, processing times, and situations where it makes sense. No marketing fluff—just practical information from actual use.