Roaming vs eSIM
Telstra charges A$10 a day in Japan for unlimited calls, texts and 2GB of data that expires at the end of each day, and the pass activates itself the moment your phone is used, per telstra.com.au, checked late September 2026.
A$10 per day, Japan sits in its day-pass zone: unlimited standard calls and SMS plus 2GB of data each day. Unused data does not roll over; at 2GB Telstra texts you an offer to buy more, per telstra.com.au.
Telstra states the pass activates the moment your service is switched on and used overseas. Land, sync, billed. Data roaming off for the Telstra line if an eSIM will carry the trip.
Seven days is A$70 for at most 14GB you can never bank. One eSIM: unlimited on KDDI for a week at $33.68, or 10GB usable any day of the week at $12.44, the live catalog checked October 22, 2026. Prices in US dollars; even after conversion the gap stays wide.
A one or two day Tokyo stopover, or needing your Australian number live for calls. Otherwise: eSIM as the data line, Telstra on for calls and texts with its data roaming off, and A$10 days never start.
A$10 per day: unlimited standard calls and texts plus 2GB of data per day, expiring nightly, activating on first use.
No. The 2GB expires at the end of each day.
Yes, on any unlocked eSIM phone: the eSIM carries data at local prices while the Telstra line stays reachable with its data roaming off.
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