The best eSIM for Americans in Vietnam in 2026.

Roam with your carrier, or buy an eSIM

AT&T's International Day Pass is $12 a day in Vietnam, $168 for two weeks and $360 for a month, read 31 October 2026. Verizon TravelPass lists Vietnam at the same $12 a day on the same date. Ringo Light is $8.99 for 7 days, $22.99 for 2 weeks and $42.99 for 30 days, unlimited data at full speed, paid once. It sells no 3-day plan for Vietnam.

Vietnam is long and thin, and most trips run two weeks or more. For 15 days, Airalo asks $48, Saily $48.99 and Holafly $51.50. For a month, they ask $69, $71.99 and $76.50. Nomad stops at 10 days for $33, and Ubigi sells no unlimited plan here. On two weeks Ringo Light is $145.01 under either day pass, and on a month $317.01 under. For 3 days, Airalo asks $11.50, against $36 on the pass.

Here is what the carrier wins. Your own number keeps ringing, calls and texts are included, and there is nothing to install. Both bill only for the days the phone is used in Vietnam. For one or two days, $12 or $24, I would roam, or pay Airalo $11.50 for 3 days of unlimited. Ringo Light starts at two weeks, so it is not my pick for a short stay.

Networks in Vietnam, and what changes for a visitor from the United States

In the table Airalo and Ubigi ride VNPT, Holafly rides Vinaphone, and Nomad lists Vietnamobile, MobiFone and Vinaphone. Saily does not name its network, and Ringo Light rides a local partner network. Viettel, the largest network, is not named by any brand I priced. I would pick on price and on the small print, not on the network.

For a visitor, the difference is how the data is billed. AT&T and Verizon charge per day of use, on the line you already pay for. Verizon says each 24-hour session carries 5 GB at high speed, then unlimited data at 3G speeds. AT&T describes unlimited high-speed data when the pass sits on an Unlimited Plan, and says speed varies by destination. The eSIMs are bought ahead and run for a set number of days.

Verizon's countries list also warns that some newer SIM cards and eSIMs may get limited service in certain destinations while local networks update. It does not single out Vietnam, but I would look in My Verizon before you fly. Neither carrier page shows a monthly plan for Vietnam, so I read the month as thirty days at $12.

A tourist SIM from Viettel or Vinaphone at Noi Bai or Tan Son Nhat airport is often cheaper per gigabyte, but you queue with your passport after a long flight. I would rather install an eSIM at home.

If you want a data bucket: Ubigi

• Ubigi, $13 for 10 GB. The cheapest 10 GB for 30 days, on VNPT with 5G. Its 20 GB is a monthly plan that renews, so I would watch the renewal.
• Nomad, $17 for 10 GB. On Vietnamobile, MobiFone and Vinaphone. 20 GB is $25, and 50 GB is $39 if you work online all month.
• Saily, $17.99 for 10 GB. 20 GB is $28.99.
• Airalo, $18 for 10 GB. Its Xin Chao plan rides VNPT. 20 GB is $29.
• ✓Ringo Light, no buckets. Its 2 weeks is unlimited for $22.99 and its 30 days unlimited for $42.99. For 10 GB that lasts a month, Ubigi at $13 is the better buy, and Nomad sells 20 GB for $25, Saily and Airalo for about $29. I would buy Ringo Light for unlimited, not for a bucket.

What Ringo Light is

I write for Ringo, so weigh my words with that in mind. Ringo Light is its data eSIM, sold to fund the full Ringo, one plan that works everywhere with your own number ported onto it. For Vietnam it sells three trips, all unlimited data at full speed: 7 days at $8.99, 2 weeks at $22.99 and 30 days at $42.99. Nothing renews. The eSIM arrives by email and installs in one scan, no app.

It sits next to your own SIM, so your number is still there for calls and texts. Both carriers say calls and texts are included on the day pass. I would put the data on the eSIM and keep the carrier line for calls.

The card to buy it is further up this page, just after the side-by-side table.