The eSIM revolution: How digital SIMs are changing global connectivity
For decades, the SIM card has been a constant fixture in our mobile lives. That small, removable chip has been the gateway to cellular networks, defining our phone numbers and data plans. However, a profound technological shift is quietly transforming the way we connect, manage carriers, travel the world: the rise of the eSIM (embedded SIM). This digital innovation is rapidly redefining mobile connectivity by making it faster, simpler, more flexible.
1. A more convenient way to manage mobile connectivity
eSIM technology introduces a more streamlined approach to mobile connectivity. By being embedded directly into the device, it removes the need for physical SIM handling and enables a fully digital activation process. Users can download a carrier profile via a QR code or app and get connected almost instantly.
From a device design perspective, eSIM also allows manufacturers to optimize internal space, supporting larger batteries or more advanced hardware components while reducing reliance on plastic-based SIM accessories.
2. Seamless service switching and flexibility
One of the most appealing features of eSIM technology is the ease of switching between service providers. Previously, switching carriers meant ordering a new physical SIM and waiting for it to arrive. Now, activation can take just minutes, giving consumers unparalleled flexibility and encouraging carriers to be more competitive and responsive.
For devices supporting Dual SIM functionality, eSIM is a game-changer. It allows users to keep their primary number on a physical SIM while using an eSIM for a secondary line – whether for work, travel, or another purpose. This dual capability has become standard on many modern smartphones.
For example, many people ask does the iPhone 11 support eSIM. The answer is yes: Apple began eSIM support with the iPhone XS/XR generation. The iPhone 11 allows Dual SIM functionality with one physical Nano-SIM and one eSIM, letting millions enjoy the convenience of this technology.
3. The traveler’s best friend: Viettel Tourist eSIM
The true revolutionary impact of the eSIM is most apparent for frequent travelers. Anyone who has landed in a foreign country knows the stress of finding a local SIM vendor, navigating unfamiliar languages, and figuring out data plans.
With an eSIM-compatible phone, travelers can purchase a plan for their destination before leaving home. Upon arrival, the plan activates automatically, providing instant connectivity without physical interaction or expensive roaming fees.
Why the Viettel Tourist eSIM is your best travel companion
- Access Vietnam’s #1 Network: Your eSIM connects directly to the Viettel network, awarded “Best Mobile Network Overall” in Vietnam (according to Ookla, 2025). Enjoy strong, stable coverage whether you’re hiking up the Vũng Tàu Lighthouse or driving along remote coastal routes.
- Keep your home number active: With all your mobile data handled by the eSIM, you can keep your primary physical SIM ready for important calls or verification messages from home.
- Instant airport setup: Registration can be completed immediately at Viettel’s official kiosks the moment you land at Tan Son Nhat International Airport (SGN) – quick, simple, and hassle-free.
- Secure and durable: Because it’s fully digital, an eSIM cannot be lost, damaged, or physically stolen like a plastic SIM card.
- Eco-Friendly choice: Choosing a digital profile helps reduce plastic waste from traditional SIM card production and packaging.
Viettel also offers a wide range of Tourist eSIM plans tailored for different trip lengths and data needs – perfect whether you’re visiting for a short holiday or staying for a longer exploration.
Viettel Tourist eSIM packages
| Plan | Validity | Package price (*) | Benefits |
| DL60 | 15 days | 60,000 VND | 12GB (total) |
| TR80 | 15 days | 80,000 VND | 5GB/day |
| DL120 | 30 days | 120,000 VND | 15GB total + 30 mins on-net calls + 15 mins off-net calls |
| SD135T | 30 days | 135,000 VND | 5GB/day |
| T160 | 30 days | 160,000 VND | 5GB/day + 30 mins on-net calls + 15 mins off-net calls |
(*) The package fee does not include the SIM price.The information regarding packages and prices is updated as of December 31, 2025. For more information and updated prices, please refer to the article: https://vietteltelecom.vn/vx/tin-tuc/chi-tiet/your-essential-guide-to-viettel-tourist-esim-plans-prices-how-to-buy/10708488