California eSIM Travel Guide
Buy a California eSIM for city stays and road trips
Planning a California trip that connects Los Angeles, San Francisco, San Diego or famous park and coastal routes? Choose AloOui's existing United States eSIM for maps, bookings and messages where supported mobile coverage is available. Your QR code is emailed after purchase. This is a statewide trip guide, not a separate California-only product.
Match the allowance and validity to every city and travel day. Prices can change; check the current total and selected plan terms before checkout.
Choose my US eSIMCompare US data plans for California travel
Fixed data
One total allowance across selected validity, not a daily reset. The US selector includes 1GB/7 days and larger fixed amounts.
Unlimited Lite
Shown as United States of America Unlimited in the selector. Compare its daily full-speed allowance and reduced-speed terms for lighter use.
Unlimited Essential
A balanced daily tier for maps, reservations and messages. Check exact full-speed and continued-data terms.
Unlimited Plus
Compare this daily tier for heavier use. Check allowance, duration and hotspot terms; Plus is not Premium.
No Premium tier is selectable on this US product. Compare exact data, speed, validity, hotspot conditions and live price on the United States plan page. A larger data allowance does not extend coverage in remote areas.
California's major city stops
Los Angeles: save the arrival airport on your ticket, accommodation address and transfer instructions before leaving Wi-Fi. See our Los Angeles eSIM guide for city-specific planning.
San Francisco: keep meeting points, hotel details and any Bay Area connections offline for reception gaps inside buildings or transit. See the San Francisco eSIM guide.
San Diego: use supported data for city directions, but do not assume a United States-only plan covers Mexico across the nearby border. See the San Diego eSIM guide.
Coast and national-park routes
For a Big Sur coastal drive, Yosemite visit or Joshua Tree route, download offline maps, tickets and emergency details before leaving a connected area. Terrain, distance, network conditions and closures can affect both travel and signal. The eSIM does not guarantee reception on every road, trail or inside a park. Confirm road access, weather, entry rules and safety notices with the relevant authorities before setting out; never rely on mobile data as your only navigation or emergency method.
Need a US phone number too?
The data eSIM and the United States Virtual Phone Number are separate products. The virtual number is offered as a monthly subscription that renews automatically. Check its calling, messaging, activation and acceptable-use terms before purchase; do not assume calls or SMS come with the data eSIM.
Explore US virtual numberInstall and troubleshoot
- Choose a United States data plan and duration, complete checkout and open the emailed QR code on another screen.
- Connect an unlocked, eSIM-compatible phone to stable Wi-Fi. On iPhone, open Settings > Cellular/Mobile Data > Add eSIM > Use QR Code. On Android, find Add eSIM in SIM manager or Network & internet; labels vary.
- Scan the code, label the line AloOui and follow the delivery email. Do not delete the installed eSIM.
- On arrival, select AloOui for mobile data and follow the selected plan's activation guidance. If data fails, check validity, mobile data and instructed roaming, toggle airplane mode, verify any APN instructions in your email and try automatic network selection. Visit the AloOui Help Center for assistance.
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California eSIM FAQs
Is this a separate California product?
No. This statewide guide links to the existing United States data eSIM.
Will the eSIM work in every national park?
No. Supported network coverage varies and remote routes may have no signal. Keep offline directions and an emergency plan.
Does fixed data renew daily?
No. It is one total allowance for selected validity. Compare daily Unlimited tiers on the live selector.
Does it include a US number?
Do not assume calls or SMS are included. The US virtual number is a separate monthly subscription.
Choose your US eSIM for California
Match data and validity to every city and travel day. Your QR code is emailed after purchase; confirm the live price before checkout.
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