Smart phone with three cards and three standby: not yet on the market.

At present, there are no smart phones with three cards and three standby devices on the market, and most mobile phones only support dual cards and two standby devices. So, what is dual card dual standby? Simply put, a mobile phone can insert two mobile phone cards at the same time, and both cards can be kept in standby state, which is convenient for users to easily switch between different cards.

History of mobile phones

The history of mobile phones can be traced back to 1940, and Bell Labs made the first battlefield mobile phone. Since then, mobile phones have undergone many technological innovations and gradually developed into portable communication devices we use.

Smart phones and non-smart phones

Mobile phones can be divided into smart phones and non-smart phones. Generally speaking, smart phones are more powerful and have more functions, but non-smart phones perform better in performance stability. No matter what kind of mobile phone, it uses the CPU of British ARM company.

Performance of smart phone

For smart phones, its main frequency is higher, its running speed is faster, and it can handle program tasks faster, making users more convenient in daily use. For example, the main frequency of Nokia n8 1 is as high as 369 MHz, providing users with excellent performance experience.

The price of non-smart phones

Non-smart phones have relatively low main frequency and slow running speed, but they are usually more affordable and suitable for users with low performance requirements. For example, the clock frequency of the Nokia 5000 is 50 MHz. Although the performance is not as good as that of smart phones, the basic functions of making phone calls, texting and so on are very stable.