The Arthur's Pass Village area is covered by Vodafone, Telecom & 2degrees (all Digital 3G/4G). Coverage does extend to some high ridges and mountain tops but should not be relied upon as an emergency alternative to telling someone where you are venturing, or taking a PLB with you. There is now coverage for all mobile networks in the Castle Hill Basin between Porters Pass and Craigieburn Cutting.
Telecom provides free Wifi to its mobile phone customers from the public phone boxes in the middle of town. Most accommodation businesses provide Wifi connections to their customers.