2. In Cambodia, the US dollar and Cambodian currency (riel) are common, and generally 1 US dollar can be exchanged for 4,000 riel (subject to the exchange rate of the day).
3. Supermarkets, restaurants, hotels and other places use more US dollars, while markets, vendors and other places use Cambodian currency. It is recommended to bring the appropriate Cambodian currency. Credit cards are basically not applicable.
4. China calls Cambodian telephone/mobile phone: country code (00855)+ area code (Phnom Penh 23 Siem Reap 63 Sihanoukville 34)+ telephone/mobile phone number.
5. If your mobile phone is enabled for international roaming, you can use it locally in Cambodia. For example, dial the local mobile phone number directly with your mobile phone.
6. If you need to call back to China, call the mobile phone: +86. If making a landline call: +86 2 1 landline.