User's Manual

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Figure 4-2 rear cover of TL904D

3) Open the SIM card cover, put the SIM card in and cover it.

4) Re-screws rear cover of the TL904D.

4.3 Install driver for USB serial cable (Windows 10)

1. Turn on the PC for Windows 10 and plug in the USB serial cable;

2. Download CH341SER.zip and extract it into a folder for later using;

3. Right click CH341SER.EXE and select ‘Run as administrator’ from the pop-up menu

to start the install program of driver;

4. Click INSTALL button shown as Figure 4-3;

Figure 4-3 CH340 / CH341 device driver install program

5. After successful installation you should see this message.