旅行前にeSIM使用でローミング回避。
主なポイント
- 旅行前eSIM購入。
- メインSIMでローミング無効化。
- 可能な時Wi-Fi使用。
- アプリで通信。
- オフラインマップダウンロード。
結論
eSIMは方法#1。70-90%節約保証。
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