Vietnam eSIM for an unhurried 15-day trip from north to south

How much data 15 days in Vietnam takes

Fifteen unhurried days: what routes become possible

Fifteen days lets you add the demanding terrain a short trip skips. One shape is north to Sapa or Ha Giang for a couple of nights, back to Hanoi, down to Da Nang, Hoi An and Hue, on to Dalat and Ho Chi Minh City, then finishing on Phu Quoc or in the Mekong Delta. That covers all three regions and several mountain and island stops.

For data this means two modes: city days with lots of Wi-Fi and light mobile use, and mountain or island days with low signal but heavy Grab and map use whenever it connects. The normal 16 GB is an average of very different days.

Where signal changes

• Ha Giang and the loop: several days on mountain roads with signal that comes and goes, so offline maps are a must and live loading cannot be relied on.
• Sapa: fog and valleys mean signal differs between the town and surrounding villages.
• Hai Van Pass between Hue and Da Nang: a mountain road by the sea, so open the map before the first bends.
• Phu Quoc: resorts mostly have Wi-Fi, but mobile signal depends on which side of the island you are on.

Which plan fits fifteen days

Fifteen days matches the validity of a fixed plan exactly, but the Vietnam 15-day plan comes in a single 3 GB size, about five times below the normal 16 GB, so it only suits people on Wi-Fi nearly all the time. With validity matching but size short, the remaining options are the 30-day plans at 10 or 20 GB and daily plans.

For the normal 16 GB, the 20 GB plan valid for 30 days fits best, leaving spare for mountain days when a connection is hit or miss. Daily plans start to lose ground at fifteen days, since you buy every day and nothing rolls over; and with sharply alternating light and heavy days, the heavy ones hit the daily cap more easily.

Connectivity facts for a longer trip

On a longer trip Zalo becomes an app you really use, because homestays in Sapa, Ha Giang and Dalat often prefer Zalo or Facebook Messenger to email. Have both ready and keep bookings as screenshots. Grab works in the big cities, but small towns and mountain areas often have little or none, and you arrange cars through your accommodation.

If you carry the same fifteen days on to a neighbouring country, one of our multi-country Asia plans that includes Vietnam might let you use a single eSIM. Open the country list on the plan page to check it covers your second destination, rather than guessing from the plan name.