Vietnam Tet 2026: eSIM and connectivity during Lunar New Year

Tet 2026: the date and what it means for travel

Tet 2026 falls on Tuesday 17 February, marking the first day of the Year of the Horse in the Vietnamese lunar calendar. The holiday period officially runs for several days, but the practical disruption to daily life in cities extends from roughly 13 to 20 February as Vietnamese workers return to their home provinces and families gather. For a traveller, Tet creates an unusual dual reality. The country's cities, particularly Ho Chi Minh City, empty significantly as urban residents travel home. Beaches and tourist destinations fill as both Vietnamese domestic tourists and international visitors take advantage of the holiday period.

The transport network in the week before Tet, particularly 10 to 16 February, operates at maximum capacity as the internal migration peaks. Trains and buses are fully booked. Airlines price their peak fares. If your itinerary requires travel during this window, book transport weeks in advance or accept that flexibility is gone from the schedule. The return migration after Tet runs from around 20 to 25 February with the same intensity in the other direction. The Tet period itself, 16 to 20 February, is the window when cities are quietest and the countryside is busiest.

Network congestion during Tet: what to expect

Vietnam's mobile networks are built for typical daily loads and handle them well, which is why average speeds of 617 Mbps nationally are achievable. Tet is the annual stress test. The combination of mass simultaneous video calls as families separated by internal migration connect across the country, social media posting at the fireworks at midnight on Tet eve, and the geographical concentration of population in home provinces creates a load spike that the network absorbs imperfectly.

The congestion is most acute in the provincial towns and rural areas where the returning population concentrates, and in the outer residential districts of major cities where people gather to watch fireworks and attend temple visits. The tourist districts of Hanoi and Ho Chi Minh City, which lose population during Tet as locals leave, can actually experience better connectivity than normal as the load on urban towers decreases. The midnight fireworks moment on 16 to 17 February is the single peak congestion point. Network speeds in affected areas can drop 30 to 60% below normal for 30 to 60 minutes around the midnight fireworks, recovering quickly afterward as the moment passes.

What closes during Tet and why it matters for connectivity

The closures during Tet have indirect connectivity implications that are worth understanding. Most shops, markets, restaurants, and businesses close for the core Tet period, typically 15 to 20 February. This includes the convenience stores and Viettel shops where you would normally top up a data plan, buy a physical SIM, or get any help with a connectivity problem. If your eSIM runs out of data on 17 February, you cannot simply walk to a Circle K and top up. The same applies if your eSIM fails and you need a replacement local SIM.

The practical implication is to treat the Tet period as a period where your connectivity plan needs to be complete and working before the holiday starts. Top up your data plan before 14 February if you are on a plan that might run short during the holiday period. Confirm your eSIM is working correctly before the Viettel shops close. Download any offline maps or content you might need for the Tet period on the hotel or accommodation wifi before the holiday starts. The days immediately before Tet are the window for any connectivity preparation that requires a functioning retail or support infrastructure.

Tet fireworks and connectivity: the midnight moment

The fireworks at midnight on 16 to 17 February are the most photographed moment of Tet for travellers, and the moment of peak network demand. In Ho Chi Minh City, the main fireworks display takes place near the Saigon River in District 1. In Hanoi, displays fire from Hoan Kiem Lake, Ho Tay lake, and several parks around the city. The concentration of thousands of people simultaneously filming, streaming, and posting to social media creates a brief but intense localised overload on the nearest mobile towers.

In practical terms: your phone will likely work for photography and video recording because these do not require a network connection. Uploading that content to social media in real time may be slow or fail during the peak minutes around midnight. WhatsApp and Instagram uploads queue and send when network capacity frees up. Live streaming is likely to fail or stutter during the peak. The best approach is to capture the fireworks locally on your phone, enjoy the moment without fighting the network, and upload when the crowd disperses and the towers recover.

Best places to be during Tet as a traveller

The Tet experience varies dramatically by location, and the connectivity picture follows the same variation. Ho Chi Minh City during Tet is quieter than normal in the tourist areas but has extraordinary street activity in the residential neighbourhoods where families gather. The flower markets along Nguyen Hue Boulevard in the days before Tet are a major event in themselves. Connectivity in District 1 and the main tourist areas is good throughout, with the midnight fireworks moment as the one brief congestion window.

Hoi An is a popular Tet destination because the Ancient Town hosts lantern festivals and decorations that make the already-photogenic streets exceptional during the holiday period. The Ancient Town has reliable Viettel 4G throughout and the increased tourist presence does not significantly strain the network in the way it might in a larger city. Hue, with its imperial traditions, also hosts Tet ceremonies around the Imperial Citadel that are worth experiencing. Both are viable connectivity environments with the usual tourist-area 4G reliability.

Rural Vietnam during Tet offers a completely different experience: the family gatherings, temple visits, and village celebrations that constitute the real Tet for Vietnamese people. Connectivity in rural areas during Tet is more variable because the returning population adds load to infrastructure designed for a smaller resident population. Expect slower speeds in village and small-town environments during the peak Tet period, with recovery as the holiday winds down.

Data planning for the Tet period

Tet is not a data-intensive event from a traveller perspective in normal terms. The activity is largely outdoor and social: visiting temples, watching fireworks, walking through decorated streets, and eating at the few restaurants and street stalls that remain open during the holiday. The data use for these activities is navigation, social media posting, and messaging. A day of Tet activity uses roughly the same data as a normal tourist day, perhaps slightly more from the increased photography and social media activity around the holiday moments.

Where Tet data planning differs from a normal period is the support infrastructure blackout. If you are running low on data during Tet, the options for topping up or getting help are limited. The safest approach is to arrive at the Tet period with more data remaining on your plan than you think you need, rather than depending on being able to top up during the holiday. An extra 2 to 3 GB buffer above your normal estimate is a reasonable Tet insurance margin.