Everything you need to know about using an eSIM in Singapore.
Singapore runs one of the world's tightest mobile networks. Singtel, StarHub, and M1 blanket the island with 4G and 5G that barely drops a bar from Marina Bay to Changi. Your eSIM Singapore plan connects to whichever carrier gives the best signal. No SIM swap, no airport kiosk queue, no roaming bill that makes you wince at the baggage carousel.
Singapore has one of the strictest SIM registration regimes in the region. Every prepaid SIM must be registered to a government-issued ID, locals use their NRIC, tourists use their passport. And since 2021 the rules are tighter: retailers have to scan and upload an image of your ID, and each registration ties to exactly one SIM. Some carriers add facial recognition on top.
There's also a cap of three prepaid SIMs per person, and a passport-registered line is data-only and expires after about 30 days. So if you're staying longer or need to receive calls, a local prepaid line is a dead end.
The airport kiosk is where it gets uncomfortable. Handing your passport to a counter staffer at Changi means a copy of it sitting in a retailer's system, and there have been documented cases of retailers misusing customer IDs to register and resell extra SIMs. That's the exact kind of identity-theft vector a privacy eSIM removes.
Singapore's PDPA requires carriers to hold your personal data no longer than needed, but a registered prepaid SIM still leaves an identifiable footprint with the carrier. There's no public blanket retention number like Australia's two years, but the point stands: once your passport is on file, the data trail exists.
Singapore is also tiny, 728 square kilometres, so 2 to 5 GB for a 3-to-14-day trip is plenty. The MRT has WiFi, the hawker centres have WiFi, even the taxis have WiFi. You need data for maps, Grab, and the occasional translation.
A privacy-focused crypto eSIM from ZILLA has none of the passport trail. No account, no email, no identity attached. Pay with crypto, scan a QR, get online. The network sees a device, not a person.
Singapore runs a tight network and a tighter record of who's on it. ZILLA keeps you off that record.