Vodafone is now offering 4G roaming - for mobile broadband, calls and texts - across 40 international destinations.
The company's Red 4G subscribers will be able to access the same level of connectivity whenever they are in one of these countries.
Another 15 nations have been added to Vodafone's roaming network, including Antigua & Barbuda, Cayman Islands, Croatia, Israel, Japan, Luxembourg and Malaysia.
Vodafone customers can also use their UK plans in Mexico, Peru, the Philippines, Qatar, Saudi Arabia, Slovenia, Sri Lanka and Thailand for the first time.
Fiji and Kuwait are expected to join the list in the coming week, prior to Christmas.
In order to access their mobile broadband, calls and texts when abroad, Vodafone Red subscribers need to pay for a EuroTraveller or WorldTraveller pass, depending upon the zone they are travelling to.
These add-ons are priced at £3 per day and £5 per day respectively.