Buy Prepaid eSIM for California – Stay Connected Instantly with MobiMatter
Get an affordable eSIM for California with instant activation and seamless connectivity wherever you go.
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USA Unlimited
NextLink
3-15 days
Unlimited
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$1.80 per day
🇺🇸 United States & 🇺🇸 Hawaii
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Buy the Best eSIM for United States
From the star-studded streets of Los Angeles to the breathtaking coastal views along the Pacific Coast Highway, and the towering redwoods of Yosemite, MobiMatter’s California SIM card keeps you connected. Skip the hassle of buying a local prepaid SIM card in California and activate instantly!
Learn more about eSIM setup & eSIM activationhere
Buy the Best eSIM for United States
From the star-studded streets of Los Angeles to the breathtaking coastal views along the Pacific Coast Highway, and the towering redwoods of Yosemite, MobiMatter’s California SIM card keeps you connected. Skip the hassle of buying a local prepaid SIM card in California and activate instantly!
Learn more about eSIM setup & eSIM activationhere
Hear from our customers
5.0
Very good provider with good prices and excellent support.
KKresimir govic
Play Store5.0
Using this service more than 2 years and very happy with it! Recommending it for anyone!
DDush@m
App Store5.0
I just bought and installed an eSim . fantastically smooth proceed, no hassle. I'll have another r|view after turning it on!
DDavid Allon
Play Store5.0
During my 5-day trip to Greece, my wife and I shared the "Europa special 10 GB" package. We used it extensively and without interruption in all 5 days, but only managed to use 5 GB. If I ever travel abroad again, I will definitely choose Mobimatter.
SSuleyman Husun
Play Store5.0
good prices and great (and quick) help of ClientService when I had a problem
RReut Ben-Yaakov
Play Store5.0
The best eSim provider in the world. In case you don't have experience and don't know how to start, they respond within just a few minutes via email. They are TOP
RRedzad Dikonja
Play Store5.0
Purchased eSIM in Australia and set it up in Azerbaijan. Having never used an eSIM before, I had a few ‘user issues’. These were sorted out very quickly via email and me sending a screen shot of my ‘attempted’ setup. Technician got back to me in very short order with some simple instructions and now all good. Great efficient service.
HHappy-Listener
App Store5.0
The cheapest eSIM app I’ve found so far. I thought I had made a mistake while installing the eSIM, so I contacted customer support. They replied to my email within just 3 minutes and helped me right away. I also had no problems with the internet connection. Overall, a great experience!
CCagalesma
App Store5.0
We were having trouble with our internet connection and reached out to the support team via email. They got back to us literally 2 minutes later and solved our problem right away. Thanks again!
RRowenasblog
App Store5.0
Good comparison, also packages for different countries
GGaolio
Play Store5.0
Very good data packages for a wide range of countries. I also had an issue regarding an esim which was resolved within minutes of me contacting customer service. Great app and customer service.
NNeedadh
App Store5.0
I used it for the first time with my wife during our trip to Japan and Korea, and I didn't experience any connection problems. The internet was fast enough in both Japan and Korea, and I was satisfied with the app. I recommend it.
Translated from Turkish
DDinçer Altınok
Play Store
How to get an eSIM for United States
Check Help & FAQs to see if your device supports eSIM
Choose United States as your destination and the best United States eSIM package
Checkout using secure payment methods
Instantly install your prepaid eSIM for quick and reliable connectivity.
Enjoy seamless, high-speed connectivity across United States with your online eSIM
Why MobiMatter is best for United States eSIMs?
Instant Activation
Activate your United States eSIM in minutes. Just scan, install, activate and stay connected from the moment you land.
Flexible Plans, Great Value
Choose affordable short or long-term data packages for United States - perfect for business trips, vacations, or for digital nomads. Most packages provide the option to top-up also.
Customer Support
Stay connected with peace of mind, backed by our round-the-clock customer service team. Reach out to them via the troubleshoot link.
Essential travel tips and guides for United States
Jul 22, 2026 — 11 min read
Does a UK eSIM Work in Ireland? The Ultimate Guide to Confusing eSIM Destinations
The Double-eSIM Trap Picture this. You are planning a dream trip to Italy with a day trip to the Vatican. You search "eSIM" and see Italy and Vatican City listed as two separate options. Naturally, you buy both. You have just fallen for a search engine optimization trap that costs real travelers real money every day. Many eSIM players list tiny micro-states, islands, and territories as standalone destinations purely to capture more Google search traffic, not because the coverage actually works...
Read more
Jul 15, 2026 — 8 min read
FIFA World Cup 2026 Finals Guide: Semis, Final, and Staying Connected
The World Cup 2026 semifinals are here, and they could not have set up better. France meets Spain in Texas. England meets Argentina in Georgia. Whoever survives will fly to New Jersey for the final on July 19. If you are chasing these matches across three cities, or just watching from home and planning your next trip to the States, here is what you need to know about the games, the venues, and how to actually stay online while you are there. Quick Summary The 2026 World Cup semi final stadium...
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Jun 29, 2026 — 11 min read
The Ultimate Multi-City Guide to the 2026 FIFA World Cup Knockout Stages
The 2026 FIFA World Cup runs June 11 to July 19 across 16 cities in the USA, Canada, and Mexico. Fans chasing the knockout stages will hop between Los Angeles, Miami, New York, Toronto, and Vancouver. The smartest move: grab a MobiMatter North America Regional eSIM before you fly so your data works seamlessly across all three countries, no SIM swaps, no roaming surprises. Quick Stats Before You Pack * 48 teams competing across 104 matches over 39 days * 16 host cities spanning 3 countries:...
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Frequently Asked Questions
Yes, most phones that support eSIM allow dual SIM functionality. You can use your physical SIM for local calls while using your United States eSIM plan for data across United States.
Yes, you can add multiple eSIM profiles to your phone, though only one can be active at a time. Our eSIMs for United States are compatible with most devices.
Yes, our United States eSIM plans support mobile hotspot and tethering, allowing you to share your internet connection across devices while traveling in United States.