T-Mobile Roaming in Vietnam: Rates, Hidden Fees, and Alternatives (2026)
Updated May 2026 · By The Roaming Cost Desk
Short Answer:
T-Mobile charges $10.00/day for roaming in Vietnam. A 7-day trip costs $70.00 in T-Mobile fees. A travel eSIM covers that same week for $3.49. You save $66.51 with HelloRoam. No contract changes needed.
T-Mobile Vietnam roaming rates
All T-Mobile plans available for Vietnam.
| Carrier | Daily | 7-day | 14-day | Data | Verdict |
|---|---|---|---|---|---|
Magenta (included) Free unlimited data at 128 Kbps on base plans, 256 Kbps on Go5G Plus and above | $0.00 | $0.00 | $0.00 | Unlimited at 2G | Free but slow |
Go5G Plus (included high-speed) 5GB high-speed per trip internationally, then 256kbps | $0.00 | $0.00 | $0.00 | 5GB high-speed included, then 256kbps | Included on plan |
International Pass Speed reduced after 2GB/day. Raised from $5/day in 2026. | $10.00 | $70.00 | $140.00 | 2GB high-speed/day | Costly |
Magenta (included) Details
Magenta (included) includes free roaming in Vietnam at 128kbps (2G) speed. Free unlimited data at 128 Kbps on base plans, 256 Kbps on Go5G Plus and above.
Go5G Plus (included high-speed) Details
Go5G Plus (included high-speed) includes free roaming in Vietnam at 5G/LTE speed. 5GB high-speed per trip internationally, then 256kbps. Go5G Plus and Go5G Next include free high-speed data internationally. No $5/day fee applies.
International Pass Details
International Pass costs $10.00/day in Vietnam. Data is 2GB high-speed/day at 5G/LTE speed. Speed reduced after 2GB/day. Raised from $5/day in 2026.. International Pass raised from $5/day to $10/day in 2026
What's included with T-Mobile in Vietnam
Data, voice, and SMS details.
Data Allowance and Speed
2GB high-speed/day at 5G/LTE speed on Viettel, Vinaphone. Speed reduced after 2GB/day. Raised from $5/day in 2026.. Local networks in Vietnam average 52 Mbps.
Voice and SMS Rates
T-Mobile charges $0.25/minute for voice calls while roaming in Vietnam. SMS is included free on Magenta plans. Wi-Fi calling is free back to the US.
Hidden charges for T-Mobile in Vietnam
T-Mobile in Vietnam: free 2G data or $10/day for LTE
T-Mobile includes free 128 kbps data in Vietnam. Go5G Plus adds 5GB high-speed free. International Pass upgrades to LTE at $10/day.
T-Mobile free roaming in Vietnam: the 128 kbps reality
T-Mobile Magenta includes free unlimited data in Vietnam at 128 kbps. This sounds generous until you experience the speed. Local networks in Vietnam average 52 Mbps. T-Mobile's free tier runs at 0.128 Mbps, which is 406x slower. At this speed, loading a single Google Maps route takes 30-45 seconds. A restaurant review on Google takes 20 seconds. Instagram will not load images. WhatsApp voice notes fail. Video calling is completely impossible. The free tier is usable for plain text SMS and basic email checking. It is not usable for any activity that involves images, maps, or real-time communication.
Go5G Plus high-speed roaming in Vietnam
T-Mobile's Go5G Plus plan includes 5GB of free high-speed data per trip while roaming in Vietnam. Go5G Next includes 15GB. This is the best free carrier roaming offer across all six carriers tracked on this site. Most data in Vietnam runs on LTE. After the high-speed allowance, speeds drop to 256 kbps. The catch: Go5G Plus is T-Mobile's most expensive domestic plan. The monthly plan cost premium may exceed the value of the included international data for travelers who take fewer than 3-4 international trips per year.
T-Mobile International Pass: $10/day in Vietnam
T-Mobile raised the International Pass from $5/day to $10/day in 2026. The pass unlocks LTE speeds on Viettel and Vinaphone in Vietnam with 2GB of high-speed data per day. After 2GB, speeds drop to 256 kbps. A 8-day trip costs $80.00 on International Pass. T-Mobile added this as an optional daily add-on; it does not auto-enroll like Verizon TravelPass. You must purchase each day explicitly through the T-Mobile app or by dialing #932# while abroad.
T-Mobile calling and texting costs in Vietnam
On the free roaming tier, voice calls in Vietnam cost $0.25/minute. Texts are included free. A 10-minute call home costs $2.50. Wi-Fi calling is free on all T-Mobile plans and uses your domestic minutes. For travelers in Vietnam, Wi-Fi calling is the recommended approach for all voice communication. Go5G Plus includes free international calling in 215+ countries, eliminating the per-minute charge. A travel eSIM does not include voice calling, but paired with Wi-Fi calling on your T-Mobile line, you get both free calls and fast data for $3.49 total.
T-Mobile vs travel eSIM for Vietnam
T-Mobile offers three tiers for Vietnam: free at 128 kbps (unusable for most), Go5G Plus with 5GB free high-speed (good for light users on premium plans), and International Pass at $10/day (expensive for longer trips). A travel eSIM at $3.49 for 1GB runs at full LTE speed with no daily cap beyond the total plan allowance. For a 8-day trip, the International Pass costs $80.00 versus $3.49 for the eSIM. The T-Mobile free tier is the only carrier option that costs less than an eSIM, but the 128 kbps speed makes it impractical for normal phone usage.
Does T-Mobile work in Vietnam?
Yes. T-Mobile works in Vietnam and includes roaming at no extra charge on unlimited plans.
T-Mobile works in Vietnam with Unlimited at 2G at 128kbps (2G) speeds, included at no extra charge. Your phone connects through Viettel, Vinaphone, Mobifone networks. Vietnam has urban-only 5G coverage. Data speeds are limited, so heavy users may want a travel eSIM for full-speed access.
T-Mobile covers Vietnam at no extra charge. Vietnam has urban-only 5G coverage.
How much does T-Mobile charge in Vietnam?
T-Mobile includes roaming in Vietnam at no extra charge. The data speed is limited to 128kbps (2G), which is slower than a travel eSIM.
| Trip | T-Mobile | eSIM | Savings |
|---|---|---|---|
| 3-day trip | Free (included) | $3.49 | N/A |
| 7-day trip | Free (included) | $3.49 | N/A |
| 14-day trip | Free (included) | $3.49 | N/A |
| 30-day trip | Free (included) | $3.49 | N/A |
A HelloRoam eSIM for Vietnam starts at $3.49 for the entire trip, with 1GB at local network speeds. No daily fees, no hidden charges, no contract.
eSIM alternative for Vietnam
Same networks, fraction of the cost.
Why an eSIM beats T-Mobile roaming
A travel eSIM connects to Viettel, Vinaphone at full LTE speed for $3.49 total.T-Mobile charges $10.00 per day for the same networks. The eSIM has no daily charges, no auto-enrollment, and no hidden fees.
- ✓204+ carrier networks worldwide
- ✓180-day refund policy
- ✓Instant QR install
- ✓Instant QR install
- ✓5G where available
- ✓Keep your home number
- ✓Instant QR install
- ✓5G where available
- ✓Keep your home number
Setup Guide: eSIM Alongside T-Mobile
- 1Put your phone in airplane mode before takeoff.Prevents T-Mobile auto-enrollment in roaming passes.
- 2Buy a travel eSIM for Vietnam.HelloRoam, Airalo, and Saily sell Vietnam plans from $3.49.
- 3Install the eSIM via QR code.Label it "Vietnam data." Keep your T-Mobile line for SMS.
- 4Switch data to the eSIM after landing.Disable T-Mobile data roaming. Enable eSIM for data only.
- 5Switch back when you return home.Return to T-Mobile for data. The eSIM stays for next time.
Cost comparison: T-Mobile vs eSIM in Vietnam
Savings across different trip lengths.
| Trip Length | T-Mobile Cost | eSIM Cost | You Save |
|---|---|---|---|
| 3 days | $30.00 | $3.49 | $26.51 |
| 7 days | $70.00 | $3.49 | $66.51 |
| 14 days | $140.00 | $3.49 | $136.51 |
| 30 days | $300.00 | $3.49 | $296.51 |
Vietnam network and coverage context
Local Networks
T-Mobile roaming connects to Viettel, Vinaphone in Vietnam. Average download speed is 52 Mbps. A travel eSIM connects to the same networks at the same speeds for a fraction of the cost.
5G Availability
5G coverage in Vietnam is urban-only. Viettel launched 5G in Hanoi and HCMC in 2024; expanding to major cities Both carrier roaming and travel eSIMs can access 5G where available, depending on your device.
Connectivity Quirks
Grab is essential for ride-hailing; works with international phone numbers
Zalo is Vietnam's dominant messaging app — locals prefer it over WhatsApp
Vietnam has extremely cheap local SIM data — often under $1/GB from carrier stores
Many cafes in Ho Chi Minh City and Hanoi have passwords displayed on receipts or walls
Vietnam blocks some foreign gambling and adult content sites at ISP level