GPRS is the English abbreviation of General Packet Radio Service (GPRS), a new packet data bearer service.The most fundamental difference between GPRS and the existing GSM voice system is that GSM is a circuit-switched system, while GPRS is a packet-switched system. Therefore, GPRS is particularly suitable for intermittent, bursty or frequent data transmission of small amounts, as well as for occasional transmission of large amounts of data. This characteristic is just right for most mobile interconnection applications. The use of GPRS can be roughly divided into two types, one is to use cell phones to browse WAP web pages, and the other is to connect to various types of computers to browse ordinary web pages. The APN for the former type of data account is cmwap, and the latter type is cmnet. CMWAP usage. Using cell phone to browse WAP web page through GPRS, and before dialing 17266 browsing is completely different feeling, not only the speed is much faster, and do not have to worry about how long has been on the end at any time. In the past, dialing 17266 to access the Internet, open the Sina WAP site requires at least 1 minute and a half, and now using GPRS, the speed of the general time only takes less than 15 seconds to get it done. Now the WAP site is much better than two years ago when it was first publicized, at least it is updated every day. Sitting in the car when bored to look at Sina news is also very interesting, usually selective look at the day's updates, the traffic is more than 30KB, choose 20 yuan monthly fee is 30 cents. Some people say, what's the point of reading WAP news. Do not be anxious, WAP web page there is a service can definitely attract you, that is, Tencent launched the WAPQQ, that is, in the WAP site and all online QQ users chat. This service was launched a long time ago, but unfortunately, at that time, browsing the WAP web page is charged by time, I believe that no one will enjoy the 9 dollars an hour chat. Now it's different, GPRS was launched, WAPQQ has a big market; you can subscribe to a monthly subscription to chat casually, you just don't subscribe to a monthly subscription to chat casually than the cost of using mobile QQ (via SMS). WAPQQ specific settings can be seen on the Tencent website in detail, I just say a little bit of their own use in the feeling. When you log in to WAPQQ, you can see your avatar light up in your friend's QQ, just like logging in to QQ on an ordinary computer. After logging into the interface, you can see your friends grouped together and show how many people are in each group and how many of them are online. After selecting a specific group, you can see the nicknames of your online friends, and by clicking on the nicknames, you can complete the operations of sending messages, seeing details, deleting friends, etc., which is just like QQ on the PC. There are still a few only number without nicknames is how it happened? It turns out that those are not online friends, you can click on those numbers, and then leave an offline message to them. How is it? It's almost the same as PC QQ. Maybe some people think it's too troublesome to read messages when using WAPQQ, and they can only rely on clicking "Read Message" to see if their friends have replied at any time. In fact, this is not difficult, because almost every page of WAPQQ has the "Read Message" link, you can click it whenever you want. There is also a more convenient one, that is PUSH message. The new GPRS cell phones basically support receiving real-time messages from the Internet, just like SMS, which is called PUSH message in Ericsson cell phones. This is called PUSH messaging in Ericsson phones. With this feature, it's much easier to chat on WAPQQ, which provides you with the ability to send PUSH messages. You just need to set up a good PUSH cell phone reception in the "Advanced Settings", and then a friend has a message to send, the system will be in the form of PUSH message to remind you, you just need to provide the message in the connection to press a little more, you can see each other's message. How is it, is it as good as Mobile QQ? First do not be happy too early, thought this business is still on trial, often not good, even Tencent's Web site has not been related to the introduction, but I think it will soon be able to officially use this feature. Someone said, I now send text messages chat QQ well, there is no need to use WAPQQ. in fact, WAPQQ has a great advantage, that is, the cost is cheap, I tried to send a normal ten messages, and look at a bunch of messages, the GPRS traffic is more than 40 KB or so, we must know that the message sent but there is no limit to the word tree ah, you want to send how many words can be mobile QQ can only be passed no more than 40 words, more words will be carded off, the word, the word, the word, the word, the word, the word. The more words it has, the more it gets stuck. Mobile QQ to send so many words, basically about 15 SMS, so the charge is 1 yuan 50 cents, and WAPQQ as long as you pay less than 50 cents of the traffic fee can be. WAPQQ more favorable point is that, now send a message to chat very little long, many times a symbol, a word on the matter, which is still charged by the flow of GPRS, the cost of even less than 1 cent; and in contrast, mobile QQ to be in every send a very short message are charged 10 cents of the cost, is really a waste of ah. The use of CMNET. I believe that many friends use GPRS are not rushed to the WAP to go, we all want to connect to the laptop through GPRS or something, there is no telephone line in the place of browsing the Internet. That's what I was thinking, and I was going to use GPRS instead of a phone line as my only way to access the Internet. My laptop is inferior, almost obsolete, a DELL Latitude CPi, a PII machine, but it's still free to use GPRS, so it seems that GPRS requires less of a computer, and many times a machine is up to the task. Ericsson's cell phone in the GPRS do extremely well, after all, most of the GPRS equipment are produced by Ericsson well, and the computer is connected to the time almost do not want too much setup, the CD-ROM into the computer, the installation of a setup software, the driver of the T39MODEM will be loaded into the reboot after the infrared will be opened to the T39 and the laptop two infrared port on the system will be able to automatically detect the The system will automatically detect the T39IRMODEM and install it automatically. Establish a dial-up connection using the above MODEM, the number is *99#, the password does not need to fill in, you can smoothly access the Internet, the dialing process is very fast, usually two seconds, if the dialing time is very long, it is best to disconnect the line to redial it. I tried the GPRS download speed is the maximum is 4KB / S, equivalent to 33.6K MODEM. this is not a problem of the phone, but at present China Mobile provides such a large speed, you want to fast can not do; and this is still the ideal state of the speed, generally in the normal 8 hours of work are unlikely to achieve. The slowest speed, the download can only reach 1.2KB / S, basically equivalent to the GSM era to provide 9.6kbps data services, this speed is very stable, it seems to be the mobile device in order to prevent network congestion and estimated restrictions on the flow of traffic, if you find a breakthrough in the future, it would be good. When using GPRS, the state of the phone is basically similar to that of a call, so battery usage is a bit of a headache. My T39 basically dies after 5 hours of GPRS, but other GPRS phones can't reach this level. The solution is to plug in the charger while casualties, too much trouble to bring the phone's original charger can use a USB charger, directly from the computer to take power. In the use of cell phones to access the Internet, connecting the phone with a special data line is much better than using the infrared interface, because the original data line are specially processed, the transmission speed is quite stable, while the infrared is vulnerable to all kinds of interference from the outside world, and is not very efficient. So it is best to buy a data cable for those who intend to use the cell phone to access the Internet, and it must be the original one. If you use a miscellaneous one, it is meaningless, and you might as well use the infrared one. Second, the current defects of GPRS. At present, the biggest problem of GPRS or network capacity is not enough to play a high-speed features. GPRS claimed that the limit of download speed can reach 20KB / S, and now the actual situation is only one-fifth of its, and to achieve this one-fifth of the price to pay a lot. After using CMNET account to access the Internet, no matter how big the traffic is, the mobile is restricted to your right to answer the phone, at this time if there is a phone call for you, can only be transferred to the Global Calling System and sent to your cell phone through SMS, if the network is now in good condition, and you do not have a full-speed download of anything, then you can receive the SMS at that time; and if it is the opposite case, you can only receive a reminder after a short of a period of time before you can receive the alert. This is a big contradiction with the mobile claim of GPRS Internet calls, and I believe that this is also a limitation of the mobile in the early stage of GPRS commercialization to ensure the smoothness of the network, which should be solved in the future. However, I always feel that the mobile does not declare this limitation in advance is a little bit of suspicion, but there is no way out, who let the Chinese only one to provide GPRS business it. While using CMWAP to browse WAP web pages, other normal functions of the phone and GPRS do not conflict, you can browse WAP web pages in the gap to answer and make calls, you can also send text messages at the same time and what not, do not interfere with each other. It seems that the so-called GPRS Internet and calls are reflected in this aspect. GPRS currently there is a relatively big problem is that the device compatibility is not good. Take my place in Shenyang, for example, mobile equipment is out of Shenzhen Huawei, Ericsson, Siemens compatibility is very good, especially Ericsson, do not have to do the tedious setup, you open the GPRS, the system will be set up to send to your cell phone, you just use on it; Siemens, although it is very troublesome to set up, but set up after the completion of the performance is also very good. Motorola's machine is a little worse, access success rate is a little lower, not to mention that the speed is not up to the maximum, always than Ericsson Siemens is a level worse. Nokia's is even worse, 6510 is difficult to access the GPRS network, 8310 is not much better, access is only to see the WAP, want to connect the laptop Internet is basically impossible. Not all mobile companies in the country are using a device, if you run into the use of Nokia GPRS equipment, Siemens and Ericsson's GPRS cell phone performance will not be as good. However, nationwide, the use of compatible Ericsson equipment is the most, after all, Ericsson is the largest producer of GPRS equipment Well GPRS --- General Packet Radio Service, General Wireless Packet Service, is a wireless packet-switching technology based on the GSM system, to provide end-to-end, wide-area wireless IP connectivity. In layman's terms, GPRS is a high-speed data-processing technology that transmits information in the form of "packets" to the user. Although GPRS is intended to be a transitional technology for the evolution of existing GSM networks to third generation mobile communications, it offers significant advantages in a number of areas. Currently, Hong Kong is the first region to conduct field tests of GPRS and has already achieved good results. Thanks to the use of "packetization" technology, users can access the Internet without suffering from disconnection (probably similar to the use of the download program NetAnts). In addition, using GPRS to access the Internet is not the same as using WAP, which is like accessing the Internet at home, where you have to "dial-up" first and then you cannot use the phone line at the same time, but GPRS is superior, as you can download data and make calls at the same time. Technically speaking, the transmission of sound (i.e., calls) will continue to use GSM, while the transmission of data can use GPRS, in which case the application of cell phones will be elevated to a higher level. The development of GPRS technology is also very "economical" because it only requires the use of the existing GSM network, which can be used for a wide range of purposes, including sending and receiving e-mails through cell phones, browsing on the Internet, etc. The slogan of mobile phone Internet access is now to send and receive e-mails and to browse the Internet. The current slogan for mobile internet access is "always online" and "IP in hand". With GPRS, data is sent and received in groups, which also means that users are always online and are billed for the amount of traffic they use, rapidly reducing the cost of the service. For China Mobile / Unicom WAP tariff policy continues to be in a difficult state, if the CSD (circuit-switched data, that is, usually said to dial-up data, Eurasian WAP services used by the bearer) bearer is changed to GPRS on the realization of the means by dozens of people **** with the same to bear the cost of the original one person. The biggest advantage of GPRS is: its data transmission speed is not comparable to WAP. The current GSM mobile communication network transmission speed of 9.6K bytes per second, GPRS cell phone launched at the beginning of this year has reached 56Kbps transmission speed, and now it is up to 115Kbps (this speed is commonly used 56Kmodem ideal rate of two times). So please cherish the hands of Nokia7110 and MotorolaL2000, I believe that by the time the GPRS cell phone is launched, they have to make way. The application of GPRS will be complemented by the development of Bluetooth (Bluetooth technology) later on. By then, the digital camera plus the bluetooth, you can immediately through the cell phone, the film transmitted to a distant place, but also a quarter of an hour, cool enough, this day will be not far away from us

.