Yesim TeamYes, Yesim works in the USA, including New York, California, Florida, and every other state. Yesim routes through T-Mobile and AT&T, which together provide the widest 4G LTE and 5G coverage in the country. For international travellers visiting the US, this means the same network quality as a local T-Mobile subscriber, at a prepaid eSIM price that undercuts carrier roaming by 70–90%.
This guide covers how Yesim performs in the three most visited US states: New York, California, and Florida with real-world speed data, neighbourhood-by-neighbourhood coverage notes, plan pricing, and what to do when something doesn’t work as expected.
Does Yesim work in the USA?
Yesim works across the entire United States through direct roaming agreements with T-Mobile and AT&T. Both carriers are available depending on which has the stronger signal at your location, your phone selects automatically.
Network details:
- T-Mobile: Widest 5G coverage in the US, strong urban 4G LTE, good rural reach
- AT&T: Strong urban 4G and 5G, particularly in business districts and major airports
- Speed: 4G LTE average 20–80 Mbps in urban areas; 5G available where T-Mobile or AT&T has deployed it and the plan supports it
Yesim plans for the USA cover all 50 states. Coverage quality in cities and suburban areas is consistent and fast. Rural areas follow the T-Mobile and AT&T footprint, most major tourist routes, national parks with visitor infrastructure, and smaller cities have reliable signal.
What you need before activating:
- A smartphone that supports eSIM most iPhones from XS (2018) onward and Android flagships from 2020 onward qualify. Check the full compatible devices list.
- A device that isn’t carrier-locked to your home operator.
- Data roaming enabled on the Yesim eSIM profile in your phone’s settings.
Yesim coverage in New York
New York City has some of the densest mobile coverage in the United States. T-Mobile and AT&T both run full 4G LTE and expanding 5G networks across all five boroughs, and Yesim connects through both.
- Manhattan: Signal is strong throughout Midtown, Downtown, the Upper East and West Side, and tourist areas like Times Square, Central Park, and the High Line. 5G is live in much of Midtown and Lower Manhattan on T-Mobile. Typical download speeds: 40–100 Mbps on 4G LTE, 200–500 Mbps on 5G where available.
- Brooklyn, Queens, Bronx, Staten Island: Consistent 4G LTE across all main residential and commercial areas. Speed is slightly lower than Midtown Manhattan but remains well above what most travel use cases need.
- NYC Subway: T-Mobile has coverage in most Manhattan underground stations and many tunnel sections. This isn’t universal, some older tunnel stretches between stations have dead zones — but connectivity has improved significantly since 2022. Download maps before going underground as a backup.
- JFK, Newark EWR, LaGuardia LGA: Full 4G LTE in all terminals. Yesim connects automatically when you turn off airplane mode after landing, you’ll have data before you reach baggage claim.
- Indoor buildings: Pre-war Manhattan buildings with thick masonry walls can reduce indoor signal. Hotel rooms in lower floors of older buildings occasionally see weaker signal. This affects all carriers equally, not just Yesim.
Full New York eSIM plan details and pricing: best eSIM for New York guide.
Yesim plans for New York
For a standard 7-day New York trip, the 7-day unlimited at $25.20 is the cleanest option, no data tracking, hotspot included. The 10 GB prepaid at $21.60 covers a week comfortably for most tourist patterns.
| Plan type | Data | Duration | Price | Per unit |
| Unlimited | ∞ | 1 day | $3.60 | $3.60/day |
| Unlimited | ∞ | 7 days | $25.20 | $3.60/day |
| Unlimited | ∞ | 15 days | $54.00 | $3.60/day |
| Unlimited | ∞ | 30 days | $108.00 | $3.60/day |
| Prepaid | 500 MB | 1 day | — | $1.08/GB equiv. |
| Prepaid | 10 GB | 30 days | $21.60 | $1.68/GB |
| Prepaid | 20 GB | 30 days | $43.20 | $1.02/GB |
| Prepaid | 30 GB | 30 days | $64.80 | $0.80/GB |
Yesim coverage in California
California is one of the most geographically varied states in the US, dense urban centres, long coastal highways, mountain ranges, and desert. Yesim’s T-Mobile and AT&T routing delivers strong coverage in the cities and along the main tourist corridors.
- Los Angeles: T-Mobile and AT&T both have extensive 4G and 5G coverage across the LA metro: Hollywood, Santa Monica, Beverly Hills, Brickell, Westside, and Downtown. Typical speeds: 30–80 Mbps on 4G LTE. LA’s size means you’re on mobile data constantly for navigation and rideshare, a plan with generous data or unlimited is the right call.
- San Francisco: Dense 4G and 5G in the city core: Financial District, SOMA, Mission, Marina, and tourist areas like Fisherman’s Wharf and Alcatraz ferry terminals. Signal in some hillside residential areas (Twin Peaks, Noe Valley) can be weaker due to terrain. The BART subway has T-Mobile coverage in tunnels, which is better than most US subway systems.
- San Diego: Strong 4G LTE throughout the city, Gaslamp Quarter, Balboa Park, and the beach communities. Coverage along the coast toward Tijuana is consistent.
- Coastal Highway 1 (Pacific Coast Highway): T-Mobile covers most of the PCH between LA and San Francisco. Some stretches of Big Sur have limited or no signal, this is a terrain issue affecting all carriers, not Yesim specifically. Download offline maps before the drive.
- Yosemite, Joshua Tree, Death Valley: Yosemite Valley has T-Mobile coverage in the main visitor areas. Signal drops off on backcountry trails. Joshua Tree has coverage near the visitor centres and main park road. Death Valley has very limited coverage. For any national park trip, download offline maps beforehand.
Full California eSIM details: California eSIM plans at Yesim.
Yesim plans for California
California road trips burn through data faster than city stays: navigation is near-constant. The 15-day unlimited at $54 or the 30 GB prepaid at $64.80 are the right choices for a full California trip covering multiple cities and coastal drives.
| Plan type | Data | Duration | Price | Per unit |
| Unlimited | ∞ | 1 day | $3.60 | $3.60/day |
| Unlimited | ∞ | 7 days | $25.20 | $3.60/day |
| Unlimited | ∞ | 15 days | $54.00 | $3.60/day |
| Unlimited | ∞ | 30 days | $108.00 | $3.60/day |
| Prepaid | 10 GB | 30 days | $21.60 | $1.68/GB |
| Prepaid | 20 GB | 30 days | $43.20 | $1.02/GB |
| Prepaid | 30 GB | 30 days | $64.80 | $0.80/GB |
Yesim coverage in Florida
Florida has strong T-Mobile and AT&T coverage across its main tourist areas and coastal cities. The state’s flat geography and dense tourist infrastructure make it one of the easier US states for mobile coverage.
- Miami / Miami Beach: Excellent 4G LTE and 5G throughout South Beach, Brickell, Wynwood, Little Havana, and the airport. Speedtest readings in central Miami average 60–70 Mbps on 4G. Signal holds up on the beach. Miami International Airport has full 4G coverage in all terminals.
- Orlando / Theme Parks: Disney World, Universal Studios, and SeaWorld all have strong T-Mobile coverage inside the parks and throughout the resort areas. Signal in Walt Disney World specifically is consistent across all four parks and Disney Springs.
- Tampa, Jacksonville, Fort Lauderdale: Strong 4G coverage throughout all three cities. Jacksonville’s coverage extends well into the surrounding suburban areas. Fort Lauderdale’s Fort Lauderdale-Hollywood International Airport has full 4G in all terminals.
- Florida Keys: Coverage follows US-1 down the Keys. Key Largo, Islamorada, Marathon, and Key West all have T-Mobile signal. Some stretches of the Overseas Highway between towns have weaker coverage. The southernmost tip of Key West has reliable 4G.
- Gulf Coast (Naples, Sarasota, Fort Myers): Good 4G coverage throughout the coastal cities. Signal degrades slightly as you move inland into the Everglades, very remote areas of Everglades National Park have limited or no coverage from any carrier.
Full Florida eSIM details: Florida eSIM plans at Yesim.
Yesim plans for Florida
For a standard Florida holiday, a week split between Miami and Orlando, the 7-day unlimited at $25.20 or the 10 GB prepaid at $21.60 both work well. Theme park trips don’t require heavy data use; 10 GB covers a week with a buffer.
| Plan type | Data | Duration | Price | Per unit |
| Unlimited | ∞ | 1 day | $3.60 | $3.60/day |
| Unlimited | ∞ | 7 days | $25.20 | $3.60/day |
| Unlimited | ∞ | 15 days | $54.00 | $3.60/day |
| Unlimited | ∞ | 30 days | $108.00 | $3.60/day |
| Prepaid | 10 GB | 30 days | $21.60 | $1.68/GB |
| Prepaid | 20 GB | 30 days | $43.20 | $1.02/GB |
| Prepaid | 30 GB | 30 days | $64.80 | $0.80/GB |
Internet speed and performance of Yesim in the USA
Yesim routes through T-Mobile’s and AT&T’s production networks. Speeds reflect actual local network conditions rather than an artificially capped roaming connection.
| Location | Network | Typical download speed | Use case confirmed |
| Midtown Manhattan, NYC | T-Mobile 5G | 150–400 Mbps | HD video streaming, large file uploads |
| Downtown Manhattan, NYC | T-Mobile 4G LTE | 40–80 Mbps | Zoom calls, navigation, social media |
| South Beach, Miami | T-Mobile 4G LTE | 50–70 Mbps | Video calls, streaming, rideshare |
| Washington DC | AT&T 4G LTE | 50–60 Mbps | Zoom calls without lag confirmed |
| Los Angeles (Hollywood) | T-Mobile 4G LTE | 30–60 Mbps | Navigation, maps, video |
| San Francisco (Downtown) | T-Mobile 4G LTE | 35–65 Mbps | Consistent for all travel use cases |
| Orlando (theme park areas) | T-Mobile 4G LTE | 20–40 Mbps | Slower during peak park hours |
Miami Speedtest readings in central areas have shown around 68 Mbps consistently, sufficient for video calls and streaming without interruption. Washington DC consistently delivered 50–60 Mbps, with Zoom calls running without freezing throughout a working day.
- 5G: Available where T-Mobile has 5G deployed, primarily Midtown Manhattan, Downtown Chicago, parts of LA, Miami, and major airports. Not all Yesim plans include 5G access; check your specific plan details if 5G speed is a requirement.
- Peak-hour congestion: In very dense areas during peak hours: Times Square on a Saturday evening, theme park main gates at opening, stadium events, all carriers experience congestion. Speeds can drop to 5–15 Mbps during these windows. This affects every eSIM provider using the same networks equally.
Does Yesim work well for tourists in the USA?
For the typical international tourist visiting the USA, Yesim covers everything needed without friction.
- Activation before arrival: Buy the plan at yesim.tech, install the eSIM at home by scanning the QR code, and set it as your active data line. When the plane lands, turn off airplane mode and Yesim connects to T-Mobile or AT&T automatically. No airport Wi-Fi hunt, no SIM kiosk queue.
- Short trips (3–7 days): The 7-day unlimited at $25.20 is purpose-built for this. Fixed cost, no data tracking, hotspot included for sharing with a laptop or travel companion.
- Multi-city US trips: A single Yesim USA plan covers all 50 states. If your trip covers New York, then Chicago, then Los Angeles, the same plan works throughout — no switching, no additional purchases. Other Yesim city guides: Miami, Las Vegas, Los Angeles.
- Hotspot: Included on all Yesim plans, useful if you’re working from a hotel room and need laptop connectivity, or sharing data with a travel partner.
- Dual SIM: Your home SIM stays in the phone alongside Yesim. Calls and SMS on your home number work normally; Yesim handles all US mobile data.
Common issues with Yesim in the USA
Most connectivity problems are configuration issues. These are the four things to check before concluding there’s a real coverage failure.
- Data roaming is not enabled. The most common issue. Even after the eSIM installs correctly, data roaming must be switched on at the device level on the Yesim eSIM profile specifically. iPhone: Settings → Cellular → Yesim plan → Data Roaming → On. Android: Settings → Connections → Mobile Networks → Data Roaming → On.
- Wrong SIM set as data line. On dual-SIM phones, you select which SIM handles mobile data. If your home SIM is set as the data line, Yesim’s data won’t activate. Go to Settings → Cellular → Cellular Data and select the Yesim eSIM.
- APN settings incorrect. In most cases Yesim’s APN populates automatically. If data isn’t loading after confirming roaming is on and the correct SIM is selected, check APN settings manually. The correct APN for Yesim’s US plans is listed in the Yesim app under support, or email support@yesim.tech.
- No signal in a specific location. If you’re in a rural area, a basement, or a building with unusual construction, signal may simply be weak. This is a coverage limitation of T-Mobile and AT&T in that location. Move to street level or a window and retry.
- Plan expired or data exhausted. Check remaining balance and expiry in the Yesim app. If the plan has ended, top up or purchase a new plan through the app. Top-ups activate immediately without requiring a new QR code installation.
Yesim vs other eSIM providers in the USA
Yesim’s specific advantage in the US market is dual-network access (T-Mobile + AT&T) with unlimited data and hotspot at $3.60/day, lower than Holafly’s unlimited rate ($4.27/day for 7 days) and with no hotspot cap. Jetpac’s $21.99 unlimited 7-day plan is the closest competitor on price. For 10 GB and above on fixed-data plans, Yesim’s $21.60 for 10 GB/30 days is competitive across the entire US eSIM market.
| Provider | Network (USA) | Unlimited data | Hotspot | 7-day price | Best for |
| Yesim | T-Mobile / AT&T | From $3.60/day | All plans | $25.20 (unlimited) | Best unlimited + hotspot value |
| Airalo | T-Mobile / AT&T | No USA unlimited | Yes | ~$22 (5 GB, 30-day) | Wide catalog, brand recognition |
| Holafly | T-Mobile | All plans | 500 MB/day cap | $29.90 (unlimited) | Unlimited, light hotspot use |
| Saily | T-Mobile | Select plans | Yes | ~$22 (5 GB, 30-day) | Budget with NordVPN security |
| Jetpac | T-Mobile | From $21.99 (7-day) | Yes | $21.99 (unlimited) | Cheapest unlimited 7-day option |
For most travelers, the choice comes down to what matters more: unlimited freedom, lowest price, or simplicity. Yesim offers the strongest balance overall thanks to dual-network coverage, unlimited data, and unrestricted hotspot support, something many competitors still limit. Jetpac is the better pick if your priority is simply getting the cheapest short-term unlimited plan, while Holafly works best for lighter users who do not rely heavily on tethering. Meanwhile, Airalo and Saily remain solid options for fixed-data travelers who want familiar apps and predictable pricing.
Vika Laki
