Traditional roaming plans often throttle your speed after a few megabytes or charge exorbitant rates per megabyte. You might think that buying a local tourist sim at 7-Eleven solves everything, but the process often requires passport registration, manual setup, and can take up to 20 minutes of your precious vacation time. This friction becomes a serious aggravation when your ride is waiting and you cannot navigate the streets of Bangkok or Phuket. The constant worry about running out of data or failing to top up mid-trip can overshadow the joy of exploring temples or island hopping.