I want to ask about buying a local calling card when traveling abroad. Usually buy a telecommunication system when traveling abroad.

1. If you don't answer and make calls frequently, you can use the domestic card to open international roaming and use the international callback function. It takes about 5-8 yuan/minute to call home and 3-5 yuan/minute to answer. Please consult the local operator for the specific price;

2. If you need to make frequent phone calls, you'd better buy a local mobile phone card abroad. Many people think it is unnecessary to buy a local card. In fact, it is more economical and convenient for free travellers. A senior friend said that international roaming is definitely not cost-effective, because travel requires frequent telephone communication with travel agencies, confirmation of departure time, drivers and even local calls to coordinate emergencies.