In other words, Wi-Fi is better, right ?

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qi********@sina.com

If you use it for a long time, you need to calculate it carefully. The advantage of portable WiFi is that it can be used simultaneously by multiple devices (up to 5), but if used for a long time, the cost is still high, such as at least 50 yuan per day in North America, which is 1500 yuan per month. In this case, you may need to compare it with the local phone card.