Roaming or an eSIM in Indonesia: what changes
Roaming keeps your home line working in Indonesia at your carrier's rates. A prepaid eSIM gives you a separate data line that cannot add charges.
- Prepaid, no extra charges
- Data roaming only if needed
- Home line stays on
The short answer
Roaming on your home line charges your carrier's rates in Indonesia. The eSIM from this site is prepaid: you pay once, it runs on Telkomsel in Indonesia, and it cannot add charges. Data roaming stays off on both lines; switch it on for the eSIM line only if the line does not connect.
Checked October 3, 2026
Home roaming against an eSIM
Cost
- Roaming on your home line
- Your carrier's roaming rates
- eSIM from this site
- Paid once, when you buy the plan
Extra charges
- Roaming on your home line
- Possible, depending on your carrier
- eSIM from this site
- None: the plan is prepaid
Setup
- Roaming on your home line
- Nothing to install
- eSIM from this site
- Added at home; switched on after landing
Data roaming switch
- Roaming on your home line
- Keep it off
- eSIM from this site
- Off by default; on for that line just if it refuses to connect
Your number
- Roaming on your home line
- Your own, at your carrier's rates
- eSIM from this site
- Your own stays on; the plans are data only
Which switch goes where
For the eSIM line, turn it on and set it to carry mobile data. Keep data roaming off; only when that line will not connect does it go on, and only there: the store’s own guidance. On your home line, keep data roaming off, so it cannot run up charges, and keep the line on for calls and texts if you want them. Calls and texts that reach your home number are billed by your home carrier.
The plans here are data only and prepaid; they run on Telkomsel in Indonesia, and their data, days and price are stated on the store before you pay.
The plan for this trip
30 days · 10 GB · US$11.88
Data only, tax included. Each plan names its Indonesian network before you pay.
Buy on VietSIMQuestions
Do I need a shop for the eSIM?
No. The eSIM is bought online before you fly, and the store shows the QR code on screen right after payment; save the page link, because it is where your code is kept. A SIM card bought in Indonesia is registered at the point of sale, with your original passport, and Indonesia pairs that with device (IMEI) registration for phones bought abroad. If a plan carries a registration step, it is stated on the plan before you pay.
At what point does the eSIM require data roaming?
Only if the line does not connect. The eSIM runs on an Indonesian network, so the switch normally stays off; the store names it as the fix for a line that will not start, and a prepaid plan cannot add a charge because of it.
Sources
Where the facts on this page come from.
Get your Indonesia eSIM before you fly.
Plans from US$4.88, tax included, on the four-country regional network. Pick one here and pay on the store in US dollars.
See the plansCheckout on VietSIM · full refund if it does not work