Not that you should “need” to do so (as in its absurd we still pay such high fees, but carrier roaming interconnect is still legacy tech for the most part), but

Not that you should “need” to do so (as in its absurd we still pay such high fees, but carrier roaming interconnect is still legacy tech for the most part), but most carriers these days have a “Intl data” add on that gives you either unlimited data for the day (usually around $10/£10/10€ based on experience) or as a full month add on for around $20 and it then uses your normal data allowance.