SIM for the USA: how much data for two weeks and a road trip
Planning a USA SIM for two weeks? How to size data for navigation, video and a road trip, when to compare a local plan with Global, and how to prepare for parks without assuming a signal the whole way.
7 min read
For two weeks in the USA, 10 GB is a reasonable starting point for maps, messages, bookings and a little social media. If you watch a lot of video or plan to share your connection, look at 20 GB. These are estimates, not a promise of how much you will use. A larger plan does not create a signal in a remote park, so save maps and bookings ahead of time. If the route continues to Canada or Mexico, compare a global plan as well and check coverage for every destination.
New York versus a road trip: two different ways of using data
Someone looking for a New York SIM usually needs a connection for dozens of small tasks: finding a subway exit, ordering a ride, sending a photo and opening a ticket for a show. Waiting in line while videos play without you noticing can use more data than all the route searches put together. Signal varies inside stations and buildings, so keep tickets and addresses available without a connection too.
On a road trip there are fewer bookings made while walking and more continuous navigation. Not every driving day is a heavy-data day: music downloaded in advance and a saved map change the picture. Children watching films through the phone, or a computer backing up photos, can change the budget completely.
Plan for who actually uses the line, not only for how many people are travelling. A plan for one phone does not mean the whole family is connected independently. If you split up in a city, anyone who needs their own connection should have their own solution.
How much data for 14 days, with and without video
Check your phone's usual data use by app. Separate what you will do outside from downloads you can do at the hotel. A simple calculation: estimate a daily amount, multiply by 14 and leave room for route changes. Half a gigabyte a day is about 7 GB over two weeks, before a safety margin.
| Kind of trip | Expected use | A planning point, not a guarantee |
|---|---|---|
| A light city week | Messages, maps, search and downloads on Wi-Fi | 5 GB |
| 14 ordinary days | Navigation, bookings, photos and a little social media | 10 GB |
| 14 video-heavy days | Video, video calls and sharing if it is supported | 20 GB or more, depending on your habits |
| Work, or an especially busy stay | Long sessions with a measured forecast | Consider an XL plan of 50 GB |
Checked on 8 November 2026, Asia/Hebron, the United States eSIM page showed local plans of 5 GB for ₪49.90, 10 GB for ₪83.90, 20 GB for ₪149.90 and 50 GB for ₪353.90. All of them are valid for 30 days from the first connection at the destination. The price to choose from is the one on the product page, not this snapshot.
There is no need to pick 50 GB only because you are travelling far. If most of the day is navigation and photos, without uploading everything to the cloud immediately, a smaller plan may fit. For a closer look by activity, see how much data you need for a week.
eSIM, a local SIM and roaming: what you get and what you don't
- Data eSIM: install it in advance on a compatible, carrier-unlocked phone. There is no card to swap, but a OneSim plan does not include a US number, regular calls or SMS.
- Local SIM: worth checking if a US number is essential for you. Confirm that the specific plan includes one, what activation requires and whether the phone is suitable. Buying something in the USA does not by itself mean every service is included.
- Roaming from your Israeli carrier: lets you stay with the provider you already have, but check the total price for 14 days, the data allowance, calls and what happens if you go over. Do not assume the daily price is the whole bill.
A fair comparison starts from the same need and the same length of trip, not from a striking starting price. The guide to eSIM versus roaming costs helps you compare without mixing a data plan with a plan that includes calls.
Parks, desert and tunnels: don't count on a continuous signal
Internet on a USA road trip has to be planned together with whether a network is available. The National Park Service warns of very limited cellular service in Yellowstone, and of congestion that can get in the way even in areas that do have a signal. That is an example from one park, not a OneSim coverage map and not a statement about every other park.
The evening before a remote stretch, download the driving area and the next stop, and save the lodging address, booking confirmation and arrival directions. Check the relevant park page for your route and season. A phone connection is not a substitute for checking road conditions. The number of gigabytes in the plan does not solve a missing network.
According to Google's guidance on offline maps, driving navigation needs the whole route to sit inside the area you downloaded. Without internet you do not get traffic updates, and walking and public-transport routes are not available offline. Check that the map actually opens before you leave, not only that a download was marked as started.
A local USA plan, or Global for the USA plus Canada or Mexico?
If the whole route is in the USA, start with the local plan: compare the amount of data you actually need, not the smallest plan. On a route that crosses borders, also look at the global plan, confirm that every country and region you will pass through is included, and compare that with buying separate local plans.
On 8 November 2026 the global page showed 5 GB for ₪110.90, against 5 GB local to the USA for ₪49.90. That compares the same amount of data, not the same coverage. Do not conclude from it which is better for a two-country route without also checking the cost of a plan for the next destination. This is not a specific confirmation of coverage in Canada or Mexico. Check that before you buy.
Your Israeli number stays, but the data plan has no US number
WhatsApp can keep working with your usual number over the data connection. That does not turn the plan into a US line, and it does not receive SMS codes to a local number. If an app or a service requires a US number, check an alternative way to verify, or a suitable phone plan, in advance.
You can leave the Israeli line on the phone, but calls and SMS on it follow your Israeli carrier's rates. Turn off data roaming on that line, and also check the automatic data-line switching setting, so the phone does not move onto it without you meaning to.
Install before the flight, 30 days from the first connection, and adding data
- Check the exact model on the compatible devices list and confirm it is carrier-unlocked.
- Install on Wi-Fi before you leave, and keep the order details somewhere you can open.
- Give the line a clear name, such as "USA — data".
- On landing, select it for mobile data and turn on data roaming for that line, following the install instructions.
- After the first day, check what you actually used. Don't wait until the last day to discover that videos are uploading to the cloud on their own.
Validity is 30 days from the first connection at the destination, not from the purchase. You can add data to the same eSIM without installing again. Do not infer that a top-up resets or extends the validity period — check its terms. This is a purchase with no subscription and no automatic renewal. The charge is in shekels, and you can pay by card, Apple Pay, Google Pay or bit. OneSim is operated by Freeman Digital.
For the full sequence, see the checklist for a first trip with an eSIM. If something is unclear, go through the help page.
Common questions
Can I share the connection in the car?
Sharing a connection depends on the device and the local network, and it is not guaranteed everywhere. If it is essential for a computer or for children, check suitability with support before you buy. Even when sharing works, use by several devices adds up on the same plan.
What if an app requires a US number?
OneSim does not include a US number. Check with the service whether another way to verify is possible, or consider a local line that explicitly includes a number and the phone services you need.
How do I use less data without giving up navigation?
Download maps, music and films on Wi-Fi, stop photo backup and updates on the mobile network, and turn off automatic video playback. Check use by app after a day or two and adjust habits from there.
Does 20 GB guarantee a connection in parks?
No. The allowance decides how much data you can use, not where there is a network. Save maps and bookings offline, and check official information for every park on the route.
Planning two weeks in the USA? Check the United States eSIM and compare 10 and 20 GB against how you actually use your phone. If the route continues to Canada or Mexico, also check coverage and price for Global before you choose.
