Preparing for your initial visit to Bangkok, Thailand? As a seasoned local guide familiar with this fantastic city - from the Grand Palace's golden spires to Yaowarat's vibrant street food stalls - the top question I receive from travelers is: "How do I get a SIM card or eSIM in Bangkok?" Whether you want to share your temple selfies on Instagram, navigate with Google Maps, book a Grab ride, translate a Thai menu, or video-call home from Wat Pho - a reliable Bangkok SIM card or eSIM is absolutely essential. Here I'll explain everything: the best service providers, the data amount you realistically need, where to get one at Suvarnabhumi Airport, genuine costs, and how to steer clear of tourist SIM scams.