3 tips for buying mobile phones

With the progress of society, mobile phones seem to have become a necessity for people. Even some people can already say that they cannot leave mobile phones. Mobile phones play an important role in daily life and work. So what do we need to pay attention to when buying a mobile phone?

Xiaobian prepared three tips for everyone:

First, the difference between ROM and RAM

The popular point that says, ROM is equivalent to the hard disk on the computer, correspond to the physical storage space of the mobile phone. RAM is equivalent to the memory in the computer, which corresponds to the running memory of the mobile phone, but it does not exist as a computer alone. It is integrated with the mobile phone CPU. The above disassemble diagram of the Apple iPhone 4S has witnessed this point. . In current commercially available smart machines, the general RAM has reached a capacity of 1GB, and the larger the space, the faster the processing tasks of the mobile phone and the operating speed of the system will be correspondingly faster.

Second, Micro SIM card

Buying mobile phones is by no means an easy task, and there are more and more things to watch out for, such as this little SIM card that is indispensable to you. At present, there are two card types on the market, one is an ordinary SIM card, which is suitable for most mobile phones. The other is a Micro SIM card, commonly known as a small card. The current mobile phones using this card include Apple iPhone 4, iPhone 4S, Motorola XT910, Meizu MX, Nokia N9, and Nokia Lumia series models.

A friend using a small card phone will definitely need to cut the card. Here are four different types of cutting tools. At present, Beijing Mobile China Mobile and China Unicom Business Office can provide free cutting service. Of course, inconvenient students can choose to use scissors to solve their own problems, but need to pay attention to the size of the micro SIM card and avoid cutting the metal chip.

The Apple iPhone 4 is the first smart phone to use the Micro SIM card. This design has its merits. The small area of ​​the SIM card is beneficial to save the slot space, and the internal structure of the mobile phone is more compact. However, it also has inconveniences. If you want to use an ordinary card phone, you have to install the original carton, otherwise the Micro SIM card cannot be fixed and the phone cannot be used. Therefore, we must consider before buying a mobile phone, and keep Cato in case of need.

Third, mobile phone TF memory card

After talking about the SIM card, let's talk about the mobile TF memory card. This can be used by everyone. Now except for some mobile phones whose battery back covers cannot be removed, such as the Apple iPhone 4S, Meizu MX, Motorola XT910, etc., other models basically need to insert TF cards to store files. In terms of capacity, 4GB, 8GB, and 16GB are even more popular. The capacity is divided, but when friends found out on the online Taobao, why does the same capacity TF card have a higher price point?

In order to better divide the performance of the memory card, the manufacturer also made a definite grade on it, divided into Class 0, Class 2, Class 4, Class 6 and Class 10 five kinds of situations. Of course, the higher the number, the faster the reading and writing speeds will be, and the more expensive the price will be, the more expensive it will be, and the different brands will have different influences in different markets, and prices will vary.

Having mastered relevant common sense, will be easily dealt with in the future purchase process.