Ascension Island is part of the British Overseas Territory of Saint Helena, Ascension and Tristan da Cunha in the South Atlantic about halfway between Africa and South America. Even though it belongs to the same territory as Saint Helena, the mobile networks are separate and hence merits a separate article.
It's not considered part of EU, so EU roaming caps don't apply and providers charge a very high price for roaming. It has roaming agreements with very few providers so far, even not all providers from the UK. That's why it will be much more likely that your device won't roam there at all.
The island has no submarine cable link and all the communications go through a relatively narrow band satellite channel. So expect low speeds (even on 4G/LTE), high latency and very high prices. The first and so far only network operator started in 2012:
- Sure South Atlantic Ltd.
Sure operates 2G/GSM/EDGE on 900 MHz and 4G/LTE on 1800 MHz (band 3). Note that there is no 3G/UMTS, so if you want data, you need a phone that supports LTE band 3 or you'll be limited to low 2G/EDGE speeds.
Sure by Sure South Atlantic Ltd. is offering WiFi hotspots, landline and mobile broadband services on the island. In 2012 it started the only mobile network on the island in 2G and later in 4G/LTE.
A SIM card costs £30 with £10 included valid for 60 days. It's sold at their service centre at Georgetown and other places.
Top-ups are available from different stores. To top-up dial *177*<CODE>#. SIM card expires 60 days after last use.
Data rates Edit
Default data rate is £0.14 per MB (= £140 per GB). They offer 2 data bundles:
- 100 MB for £13. To buy dial *173*100#
- 200 MB for £24. To buy dial *173*200#
Note that the same amount of data would cost £14 resp. £28 on the default rate. So if you're unsure that you'll use all of bundle, it may not be worth getting one.