Vietnam eSIM for a 7-day, two-city trip with an internal flight

How much data 7 days in Vietnam takes

Seven days, two cities: the rhythm of the trip

Seven days differs from five in having one seam. A common pattern is three nights in Hanoi eating and wandering the Old Quarter, a day out to Ninh Binh or Ha Long Bay, then a domestic flight to Da Nang and four nights around Hoi An, or the reverse, depending on your inbound and outbound flights.

The advantage is that one Vietnam plan covers both cities. Our Vietnam plans work in the north and the centre alike, with nothing to reinstall in between.

Where data spikes and falls over seven days

• Internal flight day: checking out, Grab to Noi Bai, flight status, then Grab again in Da Nang and the map to find the hotel. It is the heaviest mobile-data day.
• Ha Long or Ninh Binh day: hours by road or boat, and signal in the bay can come and go, so do not plan live work or big downloads on the boat.
• Three Hanoi nights: plenty of hotel and restaurant Wi-Fi, so mobile data is for maps in the narrow Old Quarter lanes and Grab.
• Four nights in Da Nang and Hoi An: lots of video of the lantern streets and My Khe beach, which is cheaper to upload later on hotel Wi-Fi.

Which plan shape fits seven days

Seven days matches the 7-day fixed Vietnam validity exactly, but that pack is only 500 MB or 1 GB, while the normal figure for seven days is 8 GB. So the 7-day pack suits relaxed travellers who use hotel and café Wi-Fi almost entirely; if you know you call Grab daily and post on the move, skip it.

For 8 GB, the 10 GB plan valid for 30 days is the nearest fixed option. You use seven days and leave the rest of the validity unused, but one pack covers both cities with no daily cut-off. If you use data heavily and expect about 15 GB, look at the 20 GB plan. The alternative is a daily plan at 1 GB or 2 GB, paying for the days you travel, but you cannot make just the flight day bigger, since one size applies to the whole trip, so size it for your heavy day.

Connectivity facts for the north-to-centre route

Grab works in both Hanoi and Da Nang, but drivers and hosts in smaller places such as Hoi An often find Zalo or Facebook Messenger easier. Have both installed and logged in beforehand. Google Maps is fine in towns, but download offline maps for the road to Ha Long and any mountain route.

Domestic airlines usually let you check in online and show the boarding pass in an app or email. Always keep a screenshot of the pass in case signal drops at the gate. The eSIM is data only with no SMS, so if an airline sends a code by SMS, use the Thai SIM to receive it.