Wireless communication test: In the GPRS wireless test interface, select 4. PppDial (PPP dialing) and press the confirm button to jump to the interface, connect succ (connection successful) appears, and then press the confirm button to connect to the server, the page jumps to display www.baidu.com to test carry out. (The system test defaults to SIM1, SIM2 needs to be tested after switching)
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