Wi-fi is limited to community access at Pusat Internet. As most guesthouse owners use WhatsApp over the internet for communication, getting responses from them can take a few days.
At research time there were no banks, ATMs or credit-card facilities in the Kelabit Highlands, so bring plenty of small-denomination banknotes for accommodation, food and guides, plus some extra in case you get stranded.
The only Malaysian mobile-phone company to have up here is Celcom and even that is limited to voice and text services.
The Bario Experience (www.barioexperience.com) is kept (mainly) up-to-date with the latest info on Bario.