Both parks have vast dead zones on all carriers. Gateway towns like West Yellowstone and Tusayan have reliable LTE, but expect zero signal for hours on backcountry trails. Download offline maps in Google Maps or Gaia GPS before entering, and do not rely on cellular for navigation inside the park boundaries.

Yes, on platforms — the MTA finished cell-service rollout in all 472 stations. You will not have signal in tunnels between stops. Only the newer L and 7 lines have consistent LTE from all three carriers; older lines have spotty coverage depending on which carrier your eSIM lands on at that moment.

Plan for 3–5 GB if you are using live navigation daily, streaming music, and checking social media. Google Maps uses roughly 5 MB per hour of active navigation, but background refresh and photo uploads add up fast. Download offline maps for the Pacific Coast Highway and inland routes through the Central Valley — both have long stretches with weak or no signal.

Yes. WhatsApp voice and video calls work over the eSIM's data connection. A 30-minute WhatsApp voice call uses roughly 20–25 MB; video calls use 200–300 MB for the same duration. If you are in a congested area like Times Square or a packed airport terminal, call quality may drop when the network slows.

Hawaii, yes — it is a domestic coverage zone, and your eSIM works there at mainland rates on both T-Mobile and AT&T. Alaska has city-only coverage in Anchorage and Fairbanks; beyond those hubs, expect long dead zones. The Alaska Range, Denali backcountry, and most highways outside the two main cities have no signal on any US carrier.

AT&T covers more rural stretches across the Midwest, Appalachia, and the Mountain West. T-Mobile leads in metro 5G but thins out fast outside city limits. The eSIM hands off between both automatically, so you get whichever is stronger at your location — you do not have to pick one and hope it works.

Yes. Uber, Lyft, and every other rideshare app work normally. The eSIM gives you a US data connection, so the app sees you as a domestic user and charges domestic rates. You will need a payment method that works in the US — most international credit cards are fine, but some prepaid cards get declined.

Roughly 5 MB per hour of active turn-by-turn navigation, so a full day of driving uses 40–60 MB if you leave it running. Background location refresh and satellite-view loading add another 20–30 MB. Download offline maps for national parks and remote highways — cellular dies fast off the interstate in Nevada, Wyoming, and Montana.

Yes, but expect congested LTE on all carriers during peak hours — the sheer number of devices slows the network. 5G millimeter-wave is available only in select terminals on Verizon and T-Mobile, and since our eSIM does not include Verizon, you will get T-Mobile's 5G if you are in one of those zones. Outside peak times, speeds are fine.

Airport SIM kiosks charge a markup — often 20–30 percent more than the same plan online or at a carrier retail store. You also wait in line, fill out paperwork, and hand over your passport. The eSIM installs in two minutes over Wi-Fi before you board your flight, and pricing is the same as local prepaid rates. The trade-off: physical SIMs sometimes include a US phone number for receiving SMS; most travel eSIMs are data-only.

No, this is a data-only eSIM. You can make calls and send texts over WhatsApp, iMessage, FaceTime, or any other internet-based app, but you will not have a US number for receiving traditional SMS or voice calls. If you need a US number for two-factor authentication, consider a virtual-number service like Google Voice.

Amtrak Wi-Fi is unreliable on long-distance routes. The Empire Builder and California Zephyr cross hours of dead zones in Montana and Nevada where the train's Wi-Fi has no backhaul and your eSIM has no towers. Download any content you need offline before boarding — movies, maps, work files — and do not expect consistent connectivity between major cities.

Spotify and Apple Music use roughly 70–150 MB per hour at standard quality, 250–350 MB per hour at high quality. A week of daily commutes or road-trip streaming can burn through 2–3 GB. Download playlists over Wi-Fi before long drives through rural areas where coverage is spotty.

Yes, both are domestic coverage zones. Your eSIM works there at the same rates as the mainland, on the same T-Mobile and AT&T networks. No roaming fees, no speed throttling. Coverage in San Juan and Charlotte Amalie is strong; smaller islands and rural areas have the same LTE-only or dead-zone patterns you see in mainland national parks.

Yes, hotspot and tethering are enabled by default. You can share the connection with a laptop, tablet, or travel partner's phone. No throttling on the first 5 GB like some US carrier prepaid plans impose. If you are tethering multiple devices all day, plan for higher data consumption — a laptop background-syncing cloud files can use 500 MB to 1 GB without you noticing.