The short answer
There are four honest ways to get online in Bali: a travel eSIM you install before you fly, a local physical SIM you buy on the island, a rented pocket Wi-Fi device, or leaning on free Wi-Fi with home roaming as backup. None of them is best for everyone. An eSIM is the fastest to set up and gets you online as you land. A local SIM is cheapest per gigabyte if you stay long or use a lot of data. Pocket Wi-Fi wins when a group wants to share one connection. Free Wi-Fi covers the evenings but strands you the moment you step outside.
Travel eSIM: online the moment you land
A travel eSIM is a digital SIM you buy online and install from a QR code before you leave home, then switch on when you land at Ngurah Rai. It keeps your home number active for calls and texts while data runs on the local network, with no queue and no passport handed across a counter. The trade-offs are real: your phone must support eSIM (most models from about 2019 on do), you cannot pass the data to a companion's phone, and for a very long or very heavy stay a local SIM bought in town is usually cheaper per gigabyte. Most travel eSIMs for Indonesia, Goodbars included, run on Telkomsel.
Local SIM: cheapest data, a local number
A local prepaid SIM, usually Telkomsel, gives you the cheapest data per gigabyte and a local Indonesian number, which helps with deliveries and some app sign-ups. Telkomsel is the widest network in the country, reaching an estimated 97 to 98 percent of the population and most remote corners, so coverage is rarely the problem. The catch is on arrival: Indonesian law requires every SIM to be registered against your passport, so you queue, show your passport, and set the card up before you are connected. Airport kiosks mark packages up and some push fake activation fees, so town shops are cheaper if you can wait a day.
Pocket Wi-Fi: one connection a group shares
A rented pocket Wi-Fi, or MiFi, is a small battery-powered router that several phones and laptops share over one connection, which makes it the value pick for families and groups. You book online, collect it at the airport, and hand it back when you leave. Expect a refundable cash deposit of around IDR 500,000 (about USD 50), a minimum rental of a few days, and a late-night pickup surcharge on some services, as of July 2026. The downsides are physical: it is one more gadget to carry and charge, its battery caps your day, and if it is lost everyone on it goes offline at once, with the deposit at risk.
Free Wi-Fi and roaming: fine as a backup
Hotel, villa and cafe Wi-Fi is free and fine for the evening, but it covers only where you are sitting, not the scooter ride, the rice terrace or the airport pickup where you most need a map. Public Wi-Fi is also the least private option, so keep banking off it. Roaming with your home SIM is the zero-setup fallback: it simply works, but many plans charge daily fees that pile up over a two-week trip, and some home carriers throttle speeds abroad. Check your roaming rate before you lean on it, because for many travellers it is the most expensive way to stay online.
Which one should you pick?
Match the tool to the trip rather than chasing a single winner. Solo travellers and couples on a one to three week holiday usually do best with a travel eSIM: online on landing, nothing to return. Long-stay visitors, digital nomads and very heavy data users often save real money on a local Telkomsel SIM once they accept the arrival queue and a new number. Families and small groups who move together can beat both on cost per head with one pocket Wi-Fi. Free Wi-Fi and roaming are backups, not a plan. Plenty of people mix these: an eSIM for the first days, a local SIM later if the numbers favour it.
