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Official Languages: Malay

English Has No Official Status but Is Widely Used in Courts, Government and Business, and Has Been a Medium of School Instruction since the 1980s, so Most People in Bandar Seri Begawan Manage Well in English. It Is Used Less in Rural Villages and Temburong, Where a Few Words of Malay Go a Long Way

Mobile Network: Coverage Runs on 4G Nationwide with 5G Expanding Progressively in and around the Main Towns; 2G Was Switched Off across the Country in 2021, so a 2G-Only Handset Will Not Connect. Reception Is Strong around Bandar Seri Begawan and the Coast, Patchier in the Rainforest Interior and Parts of Temburong District

Roaming/SIM/eSIM: Roaming Is Simple but Costly for More than a Short Stay. A Local SIM Usually Gives the Best Data Rates If Your Phone Is Unlocked, Though Registration Can Take a Counter Visit. An eSIM Is the Quickest Way to Get Connected on Arrival If Your Device Supports It, Trading a Slightly Higher Price for No Queue and No Physical Swap; a Local SIM Still Wins for a Long Stay Needing a Local Number or Cash Top-Ups

Cards Are Accepted at Hotels, Malls and Larger Restaurants in Bandar Seri Begawan, but Cash Still Matters for Markets, Water Taxis, Smaller Eateries and Temburong. The Brunei Dollar Is Pegged 1:1 to the Singapore Dollar, and Singapore Dollars Circulate Interchangeably Alongside It, Though Change Usually Comes Back in Brunei Dollars

Tipping Is Not an Established Custom in Brunei. Hotels and Higher-End Restaurants Often Add a Service Charge to the Bill, so Check before Adding More. Rounding Up for Taxis or Casual Dining Is Appreciated but Not Expected, and Hospitality Staff Do Not Rely on Tips as Income

Plug Type: Type G (UK-Style Three-Pin)

Voltage: 240 V, 50 Hz

Adapter: Visitors from the UK, Singapore, Malaysia, Hong Kong and Other Type G Countries Need No Adapter. Most Travellers from Mainland Europe, the Americas and Much of Asia Will Need One, Plus a Step-Down Converter for 110-120 V Devices without Dual-Voltage Support