Prepaid vs Postpaid for Frequent Travelers: The Real Cost Breakdown By Chester Takau · August 2026 Direct answer If you're abroad more than a few weeks a year, a prepaid travel eSIM for data beats postpaid roaming on cost almost every time — carrier day-passes run $10-$20/day versus $3-$5/day for prepaid eSIM data. But don't cancel your postpaid line to get there. Downgrade it to a cheap plan that just holds your number, and run a prepaid eSIM alongside it for data. The exception: short trips (under a week) to one country where your carrier sells a flat-rate day pass — juggling a prepaid eSIM install isn't worth the savings. Chester Takau Chester Takau is an independent reviewer of dual-SIM and eSIM technology, testing setups from the Pacific where connectivity choices really matter. This isn't really a prepaid-vs-postpaid question — it's a "what does each line need to do" question. Postpaid and prepaid aren't co...