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Last checked: October 2026.
A Zanzibar SIM card is the simplest insurance against a weak hotel signal. Where it falls down is the last hundred metres: the resort whose wifi lives only in the lobby, the villa at the end of a coral track where the connection slows to a crawl whenever more guests are online. This page covers the practical choices, and why you may want to use them less than you planned.
The detail
The networks. Tanzania has four main mobile operators, all present on Zanzibar: Vodacom (rated strong on the islands and the mainland; sources disagree on whether it beats Airtel on Zanzibar, so check a recent coverage map), Airtel (close behind, and often the better choice on a mainland safari), Yas (the former Tigo) and Halotel. You may also see Zantel, Zanzibar's own former network: it has been folded into Yas (rebranded from TigoZantel in late 2024), so older guides that mention it mean Yas. For a holiday that mixes a safari and the coast, Vodacom or Airtel is the sensible single choice; if you are only on Zanzibar, either will serve.
Where to buy. Operators sell SIMs from counters at the airport and from official shops and registration agents in Stone Town and the larger coastal villages; your hotel can point you to the nearest. The arrival sequence itself — immigration, bags and meeting your driver — is covered in the Zanzibar airport arrival guide. If the airport counter is busy, there is no harm in waiting for a town shop the next morning.
Registration — what to expect. Tanzania requires every SIM to be registered to a named person with biometric verification. Foreign visitors register with a passport; residents use their national ID. The agent records your passport details, takes a photograph and scans your fingerprints; the operator holds that record for the telecoms regulator. An unregistered SIM stops working, so let the agent finish the process before you leave the counter, and keep the registration slip until you fly home. If you would rather not give fingerprints at a counter, an eSIM avoids the process, though it means no local number.
What it costs. A SIM itself is nominal — around TZS 1,000 (well under a dollar). Data is bought in bundles: a Vodacom 7-day bundle has been listed at about 3 to 5 GB for TZS 10,000 (roughly $4), with domestic minutes and texts included on some versions. Bundles change often; the agent will show you the current menu. Top up with scratch cards from any kiosk, or with mobile money once you have it.
eSIMs. If your phone supports eSIM, providers such as Airalo and the other travel eSIM marketplaces sell Tanzania plans you can install before departure — typically from about $4–4.50 for 1 GB over a week, with larger plans priced higher per gigabyte than a local SIM. You pay for convenience and usually lose the local number, which matters if you want to call a driver or a restaurant. Many travellers run both: an eSIM for landing, a local SIM once settled.
SIM, eSIM or hotel wifi at a glance.
| Local SIM | Travel eSIM | Hotel wifi | |
|---|---|---|---|
| Cost | ~TZS 1,000 SIM + ~TZS 10,000 for a 7-day bundle (about 3–5 GB) | from ~$4–4.50 for 1 GB / 7 days | part of your stay where offered |
| Local number | Yes | Usually no (data only) | No |
| Setup | Passport, photo and fingerprint at a counter or shop | Install at home before you fly | None |
| Best for | Stays of more than a few days; calling drivers and restaurants; the east coast | Short stays, late arrivals, avoiding the counter | Stone Town and the larger northern resorts |
Hotel wifi by coast, honestly.
- Stone Town: usually good. Boutique hotels and the larger properties often have wifi throughout.
- Nungwi and Kendwa: the big resorts often have solid wifi in rooms and public areas; smaller guesthouses vary.
- The east coast (Matemwe to Jambiani): this is where expectations need adjusting. Some lodges offer wifi in the restaurant and lounge only, speeds dip in the evening when everyone is uploading the day, and power cuts can take the router with them. A local SIM with a hotspot is the dependable backup.
- Pemba and the private islands: can be intermittent. The Manta Resort's own before-arrival notes describe mobile signal as limited and wifi as available but intermittent, a consequence of the location. Go expecting to be offline for stretches, and check each property's own notes before you rely on it.
The case for switching off. None of this is a hardship. Zanzibar's best hours — the dhow at dusk, the tide going out over the flats, dinner on the sand — are the ones a phone adds nothing to. If you are weighing a well-connected resort against a quieter lodge with a weaker signal, decide which days you need to be reachable, and put those days in Stone Town or the north.
Key facts
Networks: Vodacom (coverage disputed between sources; check a map), Airtel, Yas (ex-Tigo), Halotel; Zantel has been folded into Yas. Where to buy: operator counters at the airport, official shops, registration agents. Registration: passport + photo + fingerprint scan; mandatory. SIM cost: ~TZS 1,000. Data: a Vodacom 7-day bundle listed at about 3–5 GB for TZS 10,000 (roughly $4) at the time of writing; confirm on the bundle menu. eSIM: from ~$4–4.50 for 1 GB/7 days, pre-installable. Wifi: usually good in Stone Town and north-coast resorts; can be patchy on the east coast and Pemba.
Planning it with Nobu
A travel designer can tell you what each property says about its wifi — room wifi, lobby wifi or none — so your working days and switched-off days go where they belong. A local SIM or eSIM on arrival is the one connectivity step we recommend, because it keeps you reachable by your travel designer and anyone collecting you throughout the journey. → Plan your journey.
Is it right for you?
A local SIM is right for anyone staying more than a few days, anyone who needs to call drivers or restaurants, and anyone on the east coast where hotel wifi is thin. An eSIM suits a short holiday, a late-night arrival or a traveller who cannot face a queue. If reliable wifi is non-negotiable — remote work, a family that streams — tell us, and a travel designer can keep you in Stone Town or the larger northern resorts; Pemba and the east coast can be a poor choice for working days. If you want the opposite, that can be arranged too. Other arrival-day practicalities — cash, insurance, safety — are on → What to know before you go.
Journeys to consider
- Shores of Zanzibar — Stone Town's good wifi, then the quieter coast where it matters less. → See Shores of Zanzibar
- Southern Safari & Spice — one SIM for the bush and the beach, and advice on which network. → See Southern Safari & Spice
