💡 For a long stay in Da Nang or Central Vietnam, the safest starting point is a Viettel prepaid SIM: widest coverage nationwide, including rural routes like the Hai Van Pass and Phong Nha. Pick one up at Da Nang Airport arrival hall right after baggage claim. The 30-day tourist pack costs 150,000 VND, about USD 6. Bring your original passport.
Key takeaways
- Viettel 30-day tourist pack (5G150T): 150,000 VND (~USD 6), 5 GB data per day. Available at the Da Nang Airport international arrival hall after baggage claim. The 5G180H pack (180,000 VND) adds 30 min on-net and 15 min off-net calls.
- Original passport required - no digital copies: Vietnamese law requires in-person biometric registration with your physical passport. The carrier photographs it at the counter.
- eSIM is available from Viettel, but you must activate it in-person at a Viettel store or authorized retailer, not online from abroad.
- For stays longer than 30 days, you can renew the data plan monthly without buying a new SIM.
- Prices and plan names change frequently: confirm the current lineup at the carrier's website or counter before paying.
Which SIM carrier should you choose for a long stay in Central Vietnam?
Three operators dominate Vietnam's mobile market: Viettel, Vinaphone (VNPT), and Mobifone. For a long stay based in Da Nang with trips to Hoi An, Hue, the Hai Van Pass, or Phong Nha, Viettel has the largest network and the most consistent 4G signal in rural and mountainous areas.
Vinaphone and Mobifone both work well within Da Nang city and along the main coastal strip. Outside the cities - especially on mountain passes or the road toward Phong Nha - Viettel's coverage is noticeably stronger. All three main carriers now offer eSIM.
For a newly arrived nomad with no local contacts, buying from Viettel at the airport removes guesswork: the kiosk is staffed, the process is explained in English, and the SIM is activated before you leave the terminal.
Physical SIM or eSIM: which works better for a long-term resident in Vietnam?
Both options work. The choice depends on your phone and how you use it.
A physical SIM is simpler for most people: buy it at the airport, hand over your passport, and you are connected within minutes. You can also swap it to a different phone if needed.
An eSIM keeps your home SIM active in the same phone alongside the Vietnamese number. That is useful if you need to receive calls on your home number during a long stay. The catch: Viettel requires in-person activation at a store or authorized retailer. You cannot purchase or activate a local eSIM remotely before flying in.
Most long-stay travelers buy the physical SIM at the airport first, then switch to eSIM at a Viettel store later if they want dual-profile convenience. Check that your phone supports eSIM and is carrier-unlocked before making the switch.
What documents do you need to register a SIM in Vietnam?
Vietnamese law requires real-name registration for all SIM cards. For foreigners, that means your physical passport. Digital copies shown on a phone screen are not accepted.
The carrier staff will photograph your passport and take a live photo of your face for biometric verification. The process takes a few minutes at the counter. You do not need a Vietnamese address or a hotel booking to purchase.
If you plan to buy a SIM a few days into your trip rather than at the airport, carry your passport with you that day. A photo of it on your phone will not suffice at the counter.
Where can you buy a SIM or eSIM in Da Nang?
The quickest option is the Viettel kiosk at Da Nang International Airport's international arrival hall, immediately after baggage claim. Look for the red-and-white Viettel sign marked "Tourist SIM" or "SIM Du Lịch".
If you prefer to compare carriers or pick up a cheaper local monthly plan, official Viettel, Mobifone, and Vinaphone stores are found throughout the city center, particularly near the beach areas of My Khe and along Nguyen Van Linh street. Shopping centers such as Vincom Plaza on Le Duan also have carrier kiosks and authorized phone shops that sell and register SIMs.
Avoid buying from street vendors or unlabeled stalls. SIM registration must be completed at a licensed counter, and an improperly registered SIM will be deactivated by the network.
What data plan works for a stay of one to three months?
Viettel's tourist packs run 30 days. For a one-month stay, the 5G150T pack (150,000 VND, 5 GB per day) covers standard remote-work use. The 5G180H (180,000 VND) adds 30 min on-net and 15 min off-net local calls per day.
For a two- or three-month stay, renew the plan each month at a convenience store, ATM, banking app, or any Viettel outlet. At around USD 6 per month for data-only, the running cost is lower than most international roaming plans.
If you want unlimited local calls alongside your data, ask the counter staff for a standard prepaid monthly pack rather than the tourist pack. The price per month can be similar or lower, and call rates are usually better. Plan names are updated frequently, so confirm the current lineup on the day you buy.
A long-stay nomad who is also sorting out visa duration in Da Nang can find the rules and current fine schedule at our visa overstay guide for Central Vietnam. The Da Nang Help service provides in-person practical support across Da Nang and the Central region.
FAQ
Can I activate a Viettel eSIM online before I fly to Vietnam?
No. Viettel requires in-person activation of its eSIM at an official Viettel store or authorized retailer (such as TGDĐ or FPT Shop). You cannot buy or activate a Viettel eSIM remotely before arriving. Once you land, buy a physical SIM at the airport to stay connected immediately, then visit a Viettel store to convert to eSIM if you want the dual-profile setup.
Does Viettel have 4G coverage in Phong Nha and on the Hai Van Pass?
Viettel covers the main highway between Da Nang and Hue, including the Hai Van Pass road and tunnel. In Phong Nha town and the main tourist route to the cave entrance, signal is generally available. Coverage may drop inside caves or on remote jungle trails. Verify current coverage at the Viettel official website before a multi-day trip outside the city.
Will my SIM stay active if I leave Vietnam for a short trip?
Your registered SIM stays attached to your account whether or not you are in Vietnam. If you leave during an active data plan period, unused days are generally not refunded, but the SIM is not deactivated for a short absence. Extended inactivity (several months without recharging) can lead some carriers to reclaim prepaid numbers. Confirm the inactivity policy at the counter when you buy.
Is it safe to buy a pre-activated SIM from a guesthouse or market stall?
No. Vietnamese law requires every SIM to be registered to the buyer's real name and passport. A pre-activated SIM sold by an unofficial vendor was registered to someone else's identity, which is illegal for the buyer and can be deactivated by the network without notice. Always buy from an official carrier store, the airport kiosk, or a licensed phone retailer, and register it with your own passport at the counter.
What if my phone is carrier-locked and won't accept a Vietnamese SIM?
A carrier-locked phone (common with US operators and some UK networks) only works with the original carrier's network, for both physical SIM and eSIM. Contact your home carrier to request an unlock before you fly; many do it free after 12 months of contract. If you cannot unlock in time, renting a pocket WiFi hotspot at Da Nang Airport is a backup, though the running cost is higher than a local SIM.
Official sources
- Viettel official shop: tourist eSIM guide for Vietnam (5 GB/day, 30 days) - confirmed plan names 5G150T (150,000 VND) and 5G180H (180,000 VND), Da Nang Airport international arrival hall kiosk, original passport and 5-step eKYC requirements. Verified October 2026.
- U.S. Embassy in Vietnam, safety and security advice - recommends maintaining reliable local communications; emergency numbers 113 (police) and 115 (ambulance) confirmed. Verified October 2026.
- UK Government, Vietnam travel advice (FCDO) - practical guidance for travelers in Vietnam including local connectivity. Verified October 2026.
Écrit par Đào Huy (Lucas), traducteur vietnamien et local anglophone à Da Nang. Quand des démarches ou un imprévu se heurtent au mur de la langue vietnamienne, je vous accompagne en personne et fournis les traductions signées qui vont avec. Obtenir de l'aide à Da Nang → · Traduction certifiée →