USA eSIM
Los Angeles, New York or Las Vegas — land already online. Install your Roamis eSIM before you fly and connect the moment you arrive, with no SIM swap and no roaming bills.
- Delivered in minutes
- Great for ESTA travel
- Keep your number
United States eSIM plans
Choose how many days you’ll travel — validity starts when you connect, not when you buy.
- 今のスマホそのまま、SIM交換不要
- 到着後すぐ自動接続
- 明瞭な料金、隠れた費用なし
- 決済後QRを即時発行
- 24時間チャット相談
- 未開通なら90日全額返金
即時 — メールでQR送付
購入後90日以内に開通
購入後にeSIMを開通（QRを閲覧）していなければ、90日以内に全額返金されます。
Select your plan
毎日1GB高速 · 使い切り後は無制限（最大128kbps）
Why travelers choose Roamis
Four things that actually matter on a trip.
Reliable
We connect through major US networks like AT&T and T-Mobile, with wide 4G/5G coverage across Los Angeles, New York, Las Vegas and beyond.
Fast
QR delivered by email in minutes — install before you fly and you’re online on touchdown.
Simple
No carrier store to find at the airport. One-touch setup — scan, install, done.
Global
One account from the US mainland to Hawaii and Guam. Top up or add a country when plans change.
Connected in three steps
From checkout to online in minutes.
Buy & receive
Pick your plan and get your eSIM QR by email within minutes.
Install
Scan the QR and add the eSIM to your phone before you fly.
Land & connect
Turn on the line when you arrive — you’re online instantly.
Frequently asked questions
Yes. Roamis connects through major US networks like AT&T and T-Mobile, covering Los Angeles, New York, Las Vegas, San Francisco and most cities and interstate routes. Remote areas such as deep national parks can be weak.
Korean passport holders can visit for up to 90 days for tourism or business without a visa, but you must get ESTA (travel authorization) approved before you fly. Your Roamis eSIM gets you online for entry, rideshare and hotel check-in on arrival.
Hawaii uses the same mainland networks and is generally covered. Guam may be separate coverage, so check the plan’s covered regions before you buy.
Validity starts when you install and connect in the US — not when you buy. Set it up before you fly and it begins counting from your first connection on arrival.
Yes, you can share your connection to a laptop or another device. Heavy tethering may be subject to the fair-use terms shown on the plan.
No. The eSIM runs alongside your existing SIM, so you keep your number for calls and texts while using Roamis for data.
Get connected before you pack
Set up your travel eSIM today and land already online.
Choose a plan