Countries such as Saudi Arabia, Israel and Thailand have been added to the existing 23 countries where Vodafone's 4G contract customers can roam on LTE abroad.
"Around four million people head overseas during the festive period so today's news is perfect for those wanting to upload photos or videos of their celebrations to their social media sites or check maps online whilst on the move," said Cindy Rose, Vodafone UK's head of consumer.
No charges will be applied for receiving calls or texts, something which Vodafone claims will protect customers against surprisingly large bills.
However, Vodafone's customers still have to pay to use 4G services when overseas. Specifically, they will be charged £3 per day to use their UK allowance in Europe and £5 a day elsewhere.
Vodafone's 4G roaming is now supported in: Antigua & Barbuda, Cayman Islands, Croatia, Israel, Japan, Luxembourg, Malaysia, Mexico, Peru, Philippines, Qatar, Saudi Arabia, Slovenia, Sri Lanka and Thailand.
Vodafone came under fire recently for charging a teacher £15,000 for a bill that was racked up by thieves in Barcelona dialling premium rate numbers. The customer claimed that he reported the incident to Vodafone immediately, and the mobile operator eventually backed down.
The news comes after Vodafone penned a deal with US telecom behemoth Alcatel-Lucent to increase its 4G coverage.
Rival operator Three allows its customers to use their UK allowance at no additional cost in 16 destinations, including the USA, Australia and France.