San Francisco eSIM Guide (2026): Tourist Data Before SFO
San Francisco travel eSIM: prepaid data before you land at SFO. AT&T / T-Mobile alternative — QR on Wi-Fi, no airport SIM queue.
Visiting San Francisco? Buy a United States travel eSIM online, scan the QR on Wi-Fi before your flight, and enable data after landing at SFO — fixed prepaid price, no roaming on your home SIM.
Airports
- SFO (San Francisco Intl.)
- SJC (San José)
- OAK (Oakland)
Local networks (reference)
AT&T, T-Mobile, Verizon — a travel eSIM routes on partner networks; you do not need a local store visit.