How many kinds of mobile phone navigation keys are there now? Explain the advantages and disadvantages in detail! !

1 rocker type: advantages: it is convenient to play games and likes the rocker. When designing a mobile phone,

The joystick also saves the keyboard area of the mobile phone.

Disadvantages: Some manufacturers' rockers feel bad. Some are prone to failure.

2-key type: most mobile phones are like this.

3 Hidden: Very few, Sony Ericsson W830 is like this.

4 wheels: There is an upper wheel and a lower wheel, which is the case with LG's latest mobile phone.

5 jogging

Dialing (three-way wheel): common in Sony Ericsson's smart phone.

Don't lose it, right?

Four-dimensional buttons refer to up, down, left and right. For example, Nokia 1600.

Now it is rarely four-dimensional, but generally five-dimensional, that is, up, down, left and right are still certain.