A Sao Tome and Principe eSIM is a virtual SIM card that connects you instantly to São Toméan mobile networks (CST, Unitel STP) without a physical card. Plans start at ~$4 for 1 GB.

Do you really need an eSIM? Sao Tome and Principe does not benefit from free EU roaming. To avoid expensive charges from your home carrier, an eSIM is the economical solution. Free WiFi is limited in hotels and cafes, especially on Principe island, so an eSIM is recommended for reliable connectivity.

Not sure which eSIM plan to choose for São Tomé and Príncipe? We'll hand-pick the best ones just for you

Personalised selection with promo codes & direct links, then reminders before you leave

Compare the best esim plans for São Tomé and Príncipe in 2026

5 plans found · Last update: May 11, 2026

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#	Plan	Data	Duration	Price/GB	Code	Price
1	São Tomé-Et-Principe Forfait eSIM prépayée - 1Go \| Ubigi Ubigi Compatible apps WhatsAppMapsInstagramTikTok+6 Coverage:	1.00GB	7 days	$24.53	-10%	$24.53$27.25
2	Africa - 30 Days RoamlessUnitel Compatible apps WhatsAppMapsInstagramTikTok+6 Coverage:	1.00GB	30 days	$25.95	-	$25.95
3	Africa - 30 Days RoamlessUnitel Compatible apps WhatsAppMapsInstagramTikTok+6 Coverage:	3.00GB	30 days	$19.65	-	$58.95
4	Africa - 30 Days RoamlessUnitel Compatible apps WhatsAppMapsInstagramTikTok+6 Coverage:	2.00GB	30 days	$22.98	-	$45.95
5	São Tomé-Et-Principe Forfait eSIM prépayée - 3Go \| Ubigi Ubigi Compatible apps WhatsAppMapsInstagramTikTok+6 Coverage:	3.00GB	15 days	$16.02	-10%	$48.07$53.41

São Tomé-Et-Principe Forfait eSIM prépayée - 1Go | Ubigi

Ubigi

Compatible apps

Coverage:

Data

1.00GB

Duration

7 days

Price/GB

$24.53

Code-10% With discount

$24.53

$27.25

Africa - 30 Days

Roamless · Unitel

Compatible apps

Coverage:

Data

1.00GB

Duration

30 days

Price/GB

$25.95

Africa - 30 Days

Roamless · Unitel

Compatible apps

Coverage:

Data

3.00GB

Duration

30 days

Price/GB

$19.65

$58.95

Africa - 30 Days

Roamless · Unitel

Compatible apps

Coverage:

Data

2.00GB

Duration

30 days

Price/GB

$22.98

$45.95

São Tomé-Et-Principe Forfait eSIM prépayée - 3Go | Ubigi

Ubigi

Compatible apps

Coverage:

Data

3.00GB

Duration

15 days

Price/GB

$16.02

Code-10% With discount

$48.07

$53.41

Which eSIM fits your trip to São Tomé and Príncipe?

Three common travel styles, three focused picks. Enter the partner promo code at checkout, then fine-tune plans in the comparison table above.

Short stay or city break
A few days on the ground: maps, messaging and socials.
Recommended minimum: 5 GB
For short stays, compare data, duration and price across providers: enough for maps, messaging and socials without overpaying.
Up to 3 plans that match this travel style
- Ubigi
  1 GB·7 days
  $27.25$24.53
  Coverage:
  -10%
- Roamless
  1 GB·30 days
  $25.95
  Coverage:
Family & hotspot sharing
Several phones, mixed usage, you want peace of mind.
Recommended minimum: 20 GB
For families, favor large buckets or unlimited for the whole trip, then double-check hotspot rules and fair-use policies.
Up to 3 plans that match this travel style
- Ubigi
  1 GB·7 days
  $27.25$24.53
  Coverage:
  -10%
- Roamless
  1 GB·30 days
  $25.95
  Coverage:
Remote work & digital nomads
Video calls, large files, sustained mobile usage.
Recommended minimum: 30 GB
For remote work, aim for a comfortable allowance (often 30+ GB) or unlimited, and validate network coverage and stability for your destination.
Up to 3 plans that match this travel style
- Ubigi
  3 GB·15 days
  $53.41$48.07
  Coverage:
  -10%
- Roamless
  1 GB·30 days
  $25.95
  Coverage:

Why an eSIM is Recommended for Sao Tome and Principe

No Free EU Roaming

Unlike European countries, Sao Tome and Principe does not benefit from free EU roaming. Your home plan will be expensive: between $2 and $5 per MB depending on your carrier. For a one-week trip with moderate usage (browsing, social media), you can easily spend $50 to $100 on roaming.

Limited Free WiFi

Free WiFi is limited in São Toméan hotels and cafes, especially on Principe island:

Availability: limited in some areas
Security: unsecured public networks, hacking risks
Reliability: unstable connections, frequent dropouts
Mobility: impossible to use while traveling (transport between islands, natural areas)

An eSIM offers secure and reliable connectivity everywhere, recommended for traveling in Sao Tome and Principe.

Network Coverage in Sao Tome and Principe

Sao Tome and Principe has good 4G coverage in main areas:

Carrier	Coverage	4G	Market Share	Used by
CST	Sao Tome, main areas	Yes	Leader	Airalo, GoMoWorld
Unitel STP	Sao Tome, main areas	Yes	Significant	Holafly, Saily

Coverage by destination

Sao Tome (city): excellent 4G coverage in the capital
Sao Tome (island): good coverage on the main island
Principe: variable coverage depending on areas
Natural areas: variable coverage, limited in some remote areas

Note: Coverage is good in main areas of Sao Tome. On Principe island and in remote natural areas, coverage may be variable.

How to Install Your Sao Tome and Principe eSIM

Purchase your plan (QR code received by email in 2 min)
Install 24-48h before departure from your WiFi
Activate upon arrival in Sao Tome and Principe (timer starts)
Keep your home SIM for calls and texts

Compatibility: iPhone XS+, Samsung S20+, Pixel 3+, Xiaomi 12+, OnePlus 8+

Best Sao Tome and Principe eSIM 2026

Comparatif

Top 5 eSIM picks for São Tomé and Príncipe (2026)

#	Fournisseur	Data	Durée	Prix	Code promo	Idéal pour
1	Airalo	5 GB	30 days	$8.50		Global leader + CST network
2	GoMoWorld	5 GB	30 days	$9.90		Best value for money
3	Holafly	Unlimited	5 days	$19	—	Unlimited data + hotspot
4	Saily	3 GB	30 days	$6.20		NordVPN included
5	Ubigi	3 GB	30 days	$8.99	—	Reliable network

All promo codes

Why these providers?

Airalo: global leader (8M+ users), CST network, code ESIMP15 (-15%)
GoMoWorld: CST network, code ESIMP (-10%), best value for money
Holafly: unlimited + hotspot, ideal for heavy users and families
Saily: built-in NordVPN to secure public WiFi connections
Ubigi: reliable network, good alternative

Conclusion

For all travelers to Sao Tome and Principe, an eSIM is highly recommended as home roaming is very expensive ($2 to $5 per MB) and free WiFi is limited in some areas.

Best choice: Airalo 5 GB at $8.50 with code ESIMP15 offers the best value for money on the CST network.

For heavy users: Holafly unlimited eliminates any stress, even for streaming and hotspot.

Small budget: Saily 3 GB at $6.20 with code ESIMP offers an economical solution.

Sao Tome and Principe eSIM FAQ

FAQ

What is the best eSIM for Sao Tome and Principe in 2026?

Airalo offers the best value for money: 5 GB for $8.50 with code ESIMP15 on the CST network. For small budgets, Saily offers 3 GB at $6.20 with code ESIMP. For unlimited, Holafly from $19.

Do I need an eSIM for Sao Tome and Principe?

Yes, highly recommended. Home roaming costs between $2 and $5 per MB in Sao Tome and Principe. For a week with moderate usage, you can easily spend $50 to $100. An eSIM costs ~$4 for 1 GB. Free WiFi is also limited in some areas.

How much does a Sao Tome and Principe eSIM cost?

From ~$4 for 1 GB. Best value: Airalo 5 GB at $8.50 with code ESIMP15. Very competitive prices compared to home roaming.

What is the network coverage in Sao Tome and Principe?

Good 4G coverage in main areas of Sao Tome. Variable coverage on Principe island and in remote natural areas. Excellent coverage in the capital.

Does the eSIM work on Principe island?

Yes, but variable coverage. Coverage is variable on Principe island depending on areas. In main areas, coverage is generally good. In remote areas, it may be limited.

Can I use the eSIM between the two islands?

Yes, generally. The eSIM generally works on both islands (Sao Tome and Principe). However, when traveling between islands, verify that your plan covers both islands.

Can I share the connection (hotspot)?

Holafly: allowed. Airalo: generally yes. GoMoWorld, Saily: works but not guaranteed. Plan larger plans for 2 people or opt for Holafly unlimited.

When should I install my eSIM?

24-48 hours before departure from your WiFi. Validity starts at first connection in Sao Tome and Principe. You can install before leaving and activate upon arrival.

What if the eSIM doesn't work?

1. Verify eSIM is set as primary data line 2. Enable "Data Roaming" 3. Restart your phone 4. Verify you are in Sao Tome and Principe (timer starts at first connection) 5. Contact 24/7 support (Airalo, GoMoWorld, Holafly)

Written and reviewed by

Valentin FourierDigital Nomad

Developer and digital nomad, I lived between Canada and the United States before continuing to explore the world. After struggling with internet connectivity abroad one too many times, I created eSIMPlanet to compare plans clearly and honestly. Every article is carefully written and reviewed to save you time and money.

Last updated : May 2026

eSIM providers available for São Tomé and Príncipe

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