Product info
Colorado eSIM plans
| Unlimited data · 5 days | $17.99 | Buy eSIM |
| Ohayu recommendsUnlimited data · 10 days | $33.99 | Buy eSIM |
| Unlimited data · 15 days | $39.99 | Buy eSIM |
| 3GB prepaid eSIM · 14 days | $8.49$2.83 / GB | Buy eSIM |
| 5GB prepaid eSIM · 30 days | $13.49$2.70 / GB | Buy eSIM |
| 10GB prepaid eSIM · 30 days | $21.49$2.15 / GB | Buy eSIM |
| 15GB prepaid eSIM · 60 days | $27.79$1.85 / GB | Buy eSIM |
| 20GB prepaid eSIM · 90 days | $34.49$1.72 / GB | Buy eSIM |
| 50GB prepaid eSIM · 90 days | $73.49$1.47 / GB | Buy eSIM |
You can install your eSIM before the trip and activate it when you arrive in United States. Validity starts after eSIM activation.
Plan details
How much mobile data you need
What's the best eSIM for Colorado?
Denver few days – 3 GB
Maps, breweries, a game.
A ski week – 10 GB
Navigation, lift apps, calls.
Mountain road trip – 20 GB
Denver, Vail, Aspen and beyond.
Working from Boulder – Unlimited
Tethering a laptop.
Coverage and network
Coverage at altitude
United States mobile networks
The Front Range cities are well covered and so is the I-70 ski corridor, which is better than most mountain states manage. Go above the resorts or off the highway and it falls away quickly. (Speedtest by Ookla, June 2026)
Speedtest Global Index · Mobile · United States · June 2026
Download
197.34 Mbps
Upload
10.35 Mbps
Latency
27 ms
Global rank
#10 of 98
Colorado, specifically
- Denver, Boulder, Colorado Springs: Strong 5G across the Front Range and on Denver light rail including the A Line from the airport.
- The I-70 ski corridor: Covered through Georgetown, Silverthorne, Vail and Glenwood. The Eisenhower Tunnel itself is a dead spot, which is brief but reliably catches people mid-call.
- Resort villages versus backcountry: Vail, Breckenridge and Aspen villages have full service, including on most lifts. Off-piste bowls, hut routes and the backcountry do not.
- Rocky Mountain National Park and the 14ers: Estes Park is fine, Trail Ridge Road is patchy, and the high summits have essentially nothing. If you are climbing a fourteener, plan as if you have no phone.
Colorado and the rest
One plan for every state, so a drive into Utah or New Mexico changes nothing.
How to install eSIM
Connected in 3 steps
- 01
Buy before you fly
Choose your data plan before your trip.
- 02
Download & install
Log in to your account, tap your eSIM, and follow the on-screen instructions.
- 03
Land & activate
Activate when you arrive in United States. Turn on roaming for the eSIM and it connects to a local network.
Before you buy, make sure your phone supports eSIM — see Ohayu compatible devices list or dial *#06#. It's a free request to your phone's settings. If you see the EID number — your phone is eSIM-compatible.
Arriving in Colorado
Airport Wi-Fi at DEN
Denver International asks for an email address and terms acceptance. There is a second, slower 2.4 GHz network with wider reach if the main one is weak.
Side by side
Colorado eSIM Comparison
Indicative comparison based on publicly listed USA plans as of August 2026. Competitor pricing and policies change - check their sites for current terms.
Frequently asked questions
Where to buy a SIM card in Colorado?
DEN has kiosks, and there are carrier stores across Denver and in the larger resort towns. Airport pricing is worse. An eSIM saves the errand.
Any ID needed to buy prepaid data in the US?
No. Prepaid lines are not registered to individuals here. An eSIM needs nothing beyond a payment method.
Will it work at the ski resorts and on the 14ers?
At the resorts, yes - the villages and most lift-served terrain have service, so lift and weather apps work. The backcountry, hut routes and high summits are a different matter: assume no signal above the resort boundary, and note the Eisenhower Tunnel on I-70 is a short dead zone on the drive up.
eSIM not working in Colorado?
Above the resorts or on a summit there may be nothing in range. On I-70 the Eisenhower Tunnel always drops. Otherwise it is nearly always the data-line setting: pick Ohayu for mobile data, allow roaming, restart the radio with Airplane mode. Chat and support@ohayu.com are open 24/7.
