Can I use free WiFi when traveling abroad?

Traveling abroad using mobile phones or other terminals can generally be achieved in three ways:

One is the wireless wifi connected to destination public places, such as hotels, restaurants, cafes, etc., which are generally provided free of charge.

The second way is to rent a portable wifi. Portable wifi is a device that can convert wired, 2.5G, 3G, 4G network or Internet connections on a computer into wifi signals, which can meet the needs of business people and tourists who are away on business and working on the move. There are two types: sim card and usb computer.

The third way is to use mobile phone card traffic to handle local mobile phone cards or open roaming function of domestic mobile phone cards.