In Bangkok, Wi-Fi is widely available in hotels, cafes, and shopping malls, making it easy to stay connected. For cellular coverage, major providers offer excellent service throughout the city, so purchasing a local SIM card at the airport or convenience stores is highly recommended; expect prices around 300-500 THB for a decent plan. As for power outlets, Thailand uses type A, B, and C sockets with a standard voltage of 220V, so bring an adapter if your devices use different plug types.