For a comprehensive 7-day exploration of California, encompassing urban centers like Hollywood, scenic drives along the coast, and natural wonders such as Yosemite National Park, an eSIM Routes plan with 5-10 GB of data is generally sufficient. This allocation supports reliable navigation through unfamiliar streetscapes, seamless use of travel apps, photo uploads, and keeping in touch. While intermittent Wi-Fi might be available, having a dedicated eSIM Routes plan ensures uninterrupted connectivity for all your itinerary's demands, especially in transit or less populated areas where public Wi-Fi is scarce.
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How much mobile data (GB) should I estimate for a 1-week California itinerary using eSIM Routes?
Updated May 30, 2026
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