I want to know the answer to the following question:
When did Saint Helena change the amount of digits in their phone numbers?
All the background I'm provided with is that "Saint Helena telephone numbers changed from 4 to 5 digits on 1 October 2013 by being prefixed with the digit "2", i.e. 2xxxx, with the range 5xxxx being reserved for mobile numbering, and 8xxx being used for Tristan da Cunha numbers (these still shown as 4 digits).". Is that enough to answer the question?