Memory card of some knowledge
Before the memory card in the selection, we first take a look at the classification of cell phone memory card. Used in mobile phones are often stored in six cartoons,

MMC Card

MMC full name is the MultiMedia Card Multimedia Card, early small memory card, because the SD card after the development of norms to retain the MMC card is compatible, it can also be used in SD devices.

SD card

SD card is called Secure Digital Memory Card or the safety of digital storage cards, is Japan’s Panasonic, Toshiba and SanDisk Corporation jointly developed by the United States a memory card.

RS-MMC

Reduce Size MMC, that is, reduced size MMC card, in addition to shrinking the size of things exactly the same as with the standard MMC. With the gift card through a small iron plates to achieve a standard-size MMC card can also be compatible with traditional SD and MMC devices.

Mini SD

As the name suggests is a mini karaoke version of the SD, RS-MMC with the same, Mini SD only reduces the volume, other aspects of SD cards with the traditional and non-discrimination, through specialized MiniSD-SD adapter can be fully compatible with the SDD devices.

TF card

TF card (full name TransTlash) is the world’s leading storage equipment maker SanDisk to develop a world’s smallest flash memory card, size 15 x 11 x 1mm, about SD cards 1 / 4, and almost the size of a fingernail.

At present, Mini SD card is becoming a trend, a growing number of mobile phones being used by manufacturers such as BenQ Cube, Dopod 585, Motorola MPx220, etc.. The same customized specifically for mobile phones it seems the only RS-MMC using a Nokia, and from 6630 began to use low-voltage RS-MMC card and not forward-compatible, so the whole RS-MMC specifications of some confusion, there is a certain compatibility问题.

Although Kaka TF the same size as the small memory card, very suitable for mobile phones, but high prices curbed the spread of it. Traditional SD, MMC is generally some of the early mobile phone memory cards used in the specifications. Today, Mini SD and RS-MMC and the general price of SD, MMC card, the price gap has been little will in the near future to become the mainstream of mobile phone configuration. Memory Stick Duo Sony’s patent is still the only Sony Ericsson mobile phones have no choice but to use the Memory Stick Duo.

The selection of memory cards for mobile phones, the first thing to consider is not how fast its access, but the stability of the problem. If you bought a super-fast speed of the legendary Zhang card machine in their own use can not be stable, then everything is no good. Usually the selection of memory cards for mobile phones is a matter of comparing a headache, you do not benefit from the well-known brands up to judge it on the phone in his performance. Perhaps a certain brand of digital camera memory card in the prestigious, but not necessarily on his cell phone the same outstanding performance. Digital camera in the stored data would not normally be retained for too long, and each photo of the capacity occupied by the basic difference between the left, in the process of reading and writing are not a large amount of disk fragmentation. And different mobile phones, mobile phones need to install software or browse the Web cache file sizes generated, together with the frequent amendments often caused by a large number of disk fragmentation, so the memory card for digital cameras to cell phones than difficult to deal much more. In this way, the test of memory card when the stability of the.

Note that the impact of the work of the stability of the memory card is not the size of your data, but the card number of the volume of documents, you store a 200MB movie may live in peace, if fitted with dozens of software shall, on the not let peace prevail. The capacity of cell phone software is usually only a few dozen a few hundred KB or KB, a 512MB card can store a document number is staggering, the more the volume of documents, amendments to the card the more the higher the stability of the requirements.

For smartphone users, the read-write memory card speed to be considered. Today’s smart phones have the processor speed up to a certain height, so the read-write memory card speed is directly related to system performance, this high-quality video in the player when its obvious. In order to give you a visual impression, from the removal of a number of mainstream online brand evaluation data, the following table

MMC Card

Brand per minute, the largest number of execution
The average rate per second storage

KINGMAX 2879
1675KB

Transcend 3310
1667KB

SD card

Brand
Per minute, the largest number of execution
The average rate per second storage

KINGMAX 267
8MB

Kingston 924
8MB

Transcend 7094
8MB

RS-MMC

Brand per minute average maximum execution rate per second storage
KINGMAX 2492 1770KB
Transcend 3650 1731KB
TwinMOS 3002 1635KB

Mini SD

Brand per minute average maximum execution rate per second storage
KINGMAX 7094 8MB
Transcend 6236 7MB
TwinMOS 6236 7MB

The final recommendations of all mobile phones before buying a good selection of the type of memory card, and then again to buy mobile phones with the corresponding. At present, the price of Mini SD card with prices similar to those of ordinary SD card, it is better to buy a Mini SD card, both in the mobile phone can exchange the use of other SD card devices. For example, the camera card to play shooting out over the phone when out Mini SD should not错啊emergency. If you are using a relatively strong performance of the smart phones, digital cameras can also by photographs in a timely manner on the phone to send to a friend through the MMS, the picture quality comparable camera phones much easier. In accordance with the views of flowers, Mini SD is both compact and high-speed performance, but also see the traditional SD-compatible devices, are also at an acceptable price range, together with the Mini SD card is an increasing number of mobile phones used by field will become the future mainstream mobile phone memory card configuration. To say that my experience of buying cards, I sell on eBay to see a card, the owner is very honest and kind people, good quality card, fair prices, I bought the mmc is 1g, the brand is the sandisk, 310 yuan , very cheap prices, spent two months, I am very satisfied. Later, my friend also asked me to buy a 512m, and 185 yuan. Owner of the qq: 630367365. For all of us to see what help is not, huh, huh. I hope people will love for their own election to the satisfaction of machine memory card to the phone can play to the best effect! ! !

Also known as T-Flash card, the full name: TransFLash, also known as: Micro SD, from Motorola with SANDISK common research and development, launched in 2004. Is an ultra-compact card (11 * 15 * 1MM), about SD cards 1 / 4, you can count the cards at present the smallest. TF card SD card converter, as later, when the use of SD cards. The use of SD adapter can be used as a storage medium of the device. TransFlash is mainly for the camera phone can shoot sharp images and video clips to download larger and developed. TransFlash card can be used to store personal data, such as digital photos, MP3, games and applications for mobile phones and personal data, but also set up a management system for copyright protection, so that downloaded music, video and games protected; the future introduction of new TransFlash also equipped with encryption, the protection of personal data, financial records and health care documents. TransFlash small volume manufacturers need not worry about the size of your phone with this design, and the other is that it gives flexibility in the use of suppliers at any time before delivery according to the different needs of customers to do the replacement, this advantage is not embedded flash of.
MicroSD cards is a very small flash memory cards, the creation of its format from SanDisk, the original memory card such as T-Flash, and renamed after the TransFlash; and re-named because of microSD because of SD Association ( SDA) mining legislation. Others have been adopted by the SDA include miniSD memory card and SD card.
Its mainly used in mobile phones, but its tiny size and storage capacity than ever, is now used in GPS devices, portable music player and a number of flash memory intraday.
Its volume of 15mm x 11mm x1mm, nearly equal to the size of a finger, is the smallest memory card. It also can be connected to SD adapter to use SD card slot. MicroSD cards now 128MB, 256MB, 512MB, 1G, 2G, 4G, 8G, 16G and 32G capacity.
Detailed Description:
◆ equivalent to about half the size of SIM cards, set up copyright protection management system, applicable to a number of multimedia applications.
◆ with adapter, use the attached SD card slot for digital products.
◆ Size: 11mm * 15mm * 1mm.
◆ applicable models: MOTO E398, V8, V635, V360, A780, A840, A1000, E770, MS400, V1010, V980 / SAMSUNG M339, M329, Z300, Z500, E848 / AMOI DV6, V3/nokia 7310c and so on.
Capacity of TF card as follows:
32G 4G 2G 1G 512M
Disadvantages:
1, slow (only a little faster than USB1.1) 2, connecting inconvenient, mainstream desktops, notebooks are not directly slot, SD-type card reader needed to read and write data. 3, technology is not yet mature, resulting in the possibility of data loss than the SD card and USB memory.

Or Secure Digital card system standard compatibility

Secondary speed: 10.0MB / s (Max)

Or write speed: 8.4MB / s (Max)

Up 100% compatibility guarantee that all micro-SD iron protein (TF) card devices

L Weight: 5 grams

Or Housing Material: Plastic

Or power consumption:
1) are as follows: 5.8 milliamperes
b) the preparation of: 15.1 milliamperes
C) Standby: 2.7 milliamperes

Or firmware upgrade: Yes

Or data protection: Yes

Or warranty: 1 year