Most nationalities need a visa. E-visa available for 90 days ($25, single/multiple entry). Russians get 15 days visa-free. Visa on arrival possible with pre-approved letter. Apply online at evisa.gov.vn.

Vietnamese Dong (VND). 1 USD ≈ 25,000 VND. ATMs everywhere, Visa/Mastercard accepted in cities. USD accepted in tourist areas but VND gives better rates. Exchange at banks or jewellery shops.

Very safe for tourists. Violent crime is rare. Watch for petty theft and bag snatching in cities. Use Grab taxis. Biggest danger is traffic — be very careful crossing streets.

Vietnam stretches 1,600km, so climate varies. Best overall: Feb-April, Oct-Nov. South (HCMC, Mekong): Nov-April. Central (Da Nang, Hoi An): Feb-May. North (Hanoi, Ha Long): Oct-Dec, Mar-April.

No, drink only bottled or boiled water. Bottled water costs 5,000-10,000 VND ($0.20-0.40). Ice in restaurants is usually safe as it's made from purified water.

Buy at airport counters (Viettel, Vinaphone, Mobifone). $5-10 for 30 days unlimited data. Passport required. eSIM also available. Viettel has best coverage.