You need to buy a car WIFI router in the 4S shop, use it as a car WIFI hotspot, and there is a charging interface on the router that can be connected to the cigarette lighter.
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2. Apply for a 3G wireless network card in the mobile or telecom business hall and insert the network card in the 3G network card jack of the router.
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3, open the mobile phone WIFI, search the signal on your mobile phone, under normal circumstances, the router is encrypted, you can find the initial password on the manual.
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4. Now the mobile phone can use WIFI normally, and the car WIFI will be installed successfully