What is the Function of SIM Cards ?

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SIM Card carries the user identity for accessing the network and receiving calls . It is also equipped with a memory to store telephone numbers along with names.
It also enables you to send and receive short messages (SMS).

Sound problem for I LIFE Laptop – Built-in Microphone lost its function .

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Check whether the mic is covered by any other stuffs. In I LIFE Laptop normally, microphone is located near F3 Key.

         How to Adjust the volume of microphone

Start menu -> Control Panel -> Sound

Choose “Recording “ -> Microphone, Click the right button of mouse and choose Properties 

Choose Levels to adjust the volume of microphone and confirm microphone is not in Mute.