Step 2: What's your favorite BlackBerry model? No matter 7 series, 8 series and 9 series, when will they go on the market and stop production? What are the advantages and disadvantages, the degree of concern, the need to master, and how to obtain information? Learn to use Baidu, learn to use Google, and learn to use forum search. Besides, what are your needs? Soft solution? Hardware decoding? No maintenance, no water, no holes, no wireless, no dark wounds? How much is this supply? What is the approximate price of this kind of goods? Even if the merchant promises that everything is normal, can you see it?
Step 3: What kind of BlackBerry merchant do you choose? Just look at sales? Only responsible for sales? Just look at word of mouth? Just look at the price? Just look at credit? To tell the truth, there is no perfect business; Second, the purpose of businessmen is to maximize their interests, and they will definitely take extreme measures. For example, low-priced promotions, businesses that run after a few shots do not exist; So, in general, soak more jars, read more posts, search more knowledge, consider it in a balanced way, and be careful!
Step 4: Pay attention to the use of third-party payment tools when purchasing, and pay attention to saving chat records. The computer at home is OK. Friends in Internet cafes should take screenshots of key parts of the chat records and upload them directly to qq space or hard disk for storage. Simple questions, if easy to understand but unclear, also need to chat, configuration, color, warranty and so on. This is evidence of your rights protection. If you miss it, you will only sigh.
Step 5: How to inspect the goods,
1. Is the express delivery complete?
2. Before installing the battery, please check the label and warranty label in the battery box. Although you can buy something for a few cents, it still reflects some problems. Write down imei, pin code, Bluetooth mac address, place of manufacture and name of warranty shop.
3. Install the battery and turn it on. When waiting, see if there is an operator's logo on the fuselage, and if there is, write it down.
4. Look at the screen to see if the operator can match the mobile phone body operator. If not, mark a question mark; If it is right, don't be too happy, because it is only a step and needs to be verified later.
5.alt+shift+h, imei, pin, esn, see if you can match the battery compartment. If not, mark a question mark; Please pay special attention to write down the supplier id here.
6. Manage the connection-turn on Bluetooth, then go to the option-Bluetooth, press the BlackBerry menu key, Options, see how many Bluetooth addresses there are, and then check with the label. If not, mark a question mark.
7. Call 10086 to try to call and signal; It's best to find another mobile phone to compare. If other mobile phones have full cell signals here, and BlackBerry has 2 or 3 cells, then the labeling problem is serious.
Edit SMS, try various keys and key combinations, and don't forget the mute and close at the top and the voice dialing keys at the side;
8. Look at the current time of the mobile phone, turn it off, unplug the battery, and reinstall it after 10 minutes to see if the time is lost. If the time has not changed, it indicates that the problem is serious.
9. Turn on the computer within 10 minutes after unplugging the battery. Check the vendor id in article 5 to see if it matches the screen boot operator. If not, the labeling problem is serious;
Check the accessories, and judge whether they are consistent with the promises of the merchants according to the accumulated experience from reading the posts.
10. Charging, try the data cable and charger to see if it can be charged. Then use the charger to see if you can charge the battery to 100%. Try headphones, if you have them.
1 1. At about 10 that night, turn off all applications, wifi, Bluetooth and radio, check the power at this time, and then press the sleep button on the top of the phone.
Ok, sleep or watch TV, don't touch the phone.
12 at around 8 o'clock the next day, look at the power of the mobile phone, which exceeds 15%. The conclusion is obvious, the motherboard leaks electricity and it is a dark injury. If accompanied by the above-mentioned symptoms such as the eighth symptom, I suggest you contact the seller to return it!
13. There is basically no problem with the above. Get the data cable and the software ready, and see if you can brush the rom with the highest version of the supported model of this phone. If not, mark the serious problems.
14. Check whether the warranty label is consistent with the seller's store name in your spare time. If not, mark the problem and you may encounter a third-hand blackberry merchant; Then use Baidu or Google to check the merchants with warranty labels and get to know the word of mouth. If you have a bad reputation, the labeling problem is serious.
15. Unplug the battery, cover the back cover, and preferably wear jeans. Put the mobile phone without battery in the front pocket and go shopping! Walk, squat, whatever. This is to test whether there is virtual welding or desoldering inside the mobile phone during normal extrusion.
16. At home, after installing the battery, test whether the call quality is normal, whether the information is normal, whether the buttons are sensitive, and whether the camera function is normal.
17. Test whether wifi and Bluetooth are normal; Import sb to test whether gps and internet access are normal;
18. Charge to 100%. At around 10 in the evening, continue to close applications, such as gps, wif, Bluetooth and radio. sleep
19. At around 8: 00 the next day, the power consumption of the mobile phone exceeded 15%. The conclusion is the same. It's a dark wound, and the motherboard leaks electricity. Go back.
Without the problems mentioned above, I think you can basically judge that you have bought a good machine.
What needs to be added is that we pay too much attention to the soft solution of hardware decoding at present, and the seller will naturally take the soft solution as a breakthrough to guide us to buy the so-called soft solution machine. In fact, objectively speaking, how many people can tell? Businessmen have been studying BlackBerry for longer than we have, so we may not anticipate what they have done, and they certainly won't tell us what they have done. Inexperienced, blindly pursuing soft solutions, ignoring a serious problem-mobile phone quality. For the same commodity, the quality of soft solution is definitely better than that of hardware decoding, but we certainly didn't consider the quality before machine soft solution or hardware decoding? Poor quality mobile phones, even if they are soft-solved, are still of poor quality; Hardware decoding will make the quality worse!
So how to judge whether there is any quality problem in the mobile phone? In fact, quality problems can only be tested by use, so we are also reminded not to confirm payment in advance, not to give evaluation in advance, and to test by extending the use time. What about the dark wound? I think it can be distinguished by the power consumption at night after normal extrusion 10 hour or so. Of course, if you know about mobile phone maintenance or have your own skills and detection tools, it is very convenient to detect whether the purchased mobile phone is faulty. But I believe that the vast majority of friends, there is no convenient way, only through their own gradual use+testing to complete the identification of mobile phones.
Finally, I hope everyone sells mobile phones!
Supplement: There are also 0 calls, the size of the seam around the mobile phone, whether there is dust on the screen, dust in the gap of keys, screw marks, waterproof labels, stickers on the shielding cover, U-hole marks, old and new, etc. I hate it most, and whether the camera is in the center, hehe, the shell changer is wrong, so I think so much. As for unlocking, it seems that anyone can solve it.
Supplement: and the LOGO on the chin. Look at its firmness. You've been using studs anyway. As long as it doesn't drop. I usually use stupid tricks to identify whether the original shell is original or not, but it is very affordable. I was cheated on dopod 8 18 once. I summed it up. Remember to deduct a little. You can't return it if it is deducted.
owner
1. Check the machine operator's logo: Check the startup and shutdown logo. If the operator logo displayed on the machine screen is different from the operation logo on the machine housing, the housing must be replaced;
2. Press ALT+CAP+H to check whether the order of pin code and imei code in the help interface is abnormal. Some merchants will brush their own machines, but they are too lazy to think, and even a number like 12345678 will appear.
If there is such a regular code, it means that the machine motherboard has been burned again with a low-level motherboard program. There must be a problem before, so don't start it;
Check online whether the operator code and pin code you just saw are consistent. If the pin is Hungarian (the most forged) and the operator is in&; T (American), it must be that the motherboard burned the number or program.
This kind of machine, whether repaired or lost by others, can't be taken;
4, sim card slot: Whether it is open or closed, we must check this place especially, because I have already met two 7290 s bought for my friends. Because the sim card slot is not tight, just press any button and the machine will restart.
So be sure to try the genuine standard sim card, whether it is inserted in place, whether it is skewed, and the quality of the card is not always stable (reflecting speed, power consumption, electrical compatibility, etc.). ), occasionally encounter cards with poor quality.
This card will definitely have problems when found in BB, so we need to find a better card to test and determine whether it is a BB problem or a card compatibility problem.
5. Pay attention to the radio sensitivity of BB: Different BB sensitivities are different, especially for refurbished machines. You need to enter the option-status from the BB desktop, and pay attention to the battery capacity. How many decibels is the radio signal? A negative value indicates the reception sensitivity. The more negative the better, just go up. If we use several grids to judge the signal, it will be too vague. At this time, you can move BB and change the status of BB, such as sideways, sideways, askew, shaking from side to side, etc. , see if the signal decibel number of BB has changed. Generally, BB with good sensitivity can see the change of signal decibel within 2 seconds, and provide a personal experience value for your reference: generally, the signal intensity room is required to be around-62dBm when the signal is in three grids, and the lower the better.
6. Battery capacity: Just now, let everyone pay attention to what is battery capacity%. If you restart it several times (restarting will consume more power than normal use), you will find that the battery capacity is obviously less.
(BB can be measured every 5% in real time, the standard BB battery is 1000mAH, and 5% is 50mAH, which is very sensitive), indicating that the battery capacity is insufficient or there is a problem. Please change another battery for you, restart it at least 5 ~ 10, plus 2 ~ 3 calls in 3 minutes, you should not see the obvious battery generated by BB.
7.BB lock: Only unlocked BB can be used normally in China. In fact, BB is not a lock, but five locks, namely sim card, network, network subset, service provider and company. You can enter mepd from the desktop-Options-Advanced -SIM card interface, and the five-lock status of BB should be displayed. Remember, if the network lock is not activated, congratulations. This BB can join the real blackberry network in the future, and your BB has potential. If it is also disabled, then you have a low-hand lock and a huge profit XXBB lock. It's not that this machine is not good, but that you need to think clearly. If you really don't join the official blackberry network in the future, you can kill the boss with this.
In addition, pay attention to the service provider lock and company lock. If these two locks are not unlocked, then you can't change operators (such as China Unicom) and companies (such as connecting to the mail server of a new company after job hopping), so if you have this requirement or encounter such machines, you must be careful; For the 8700, you can continue to enter mep2 and enter the secondary locking state for inspection. The more newest things BB gets, the stronger the encryption becomes. If you see that the number of password entries in the 8700 has reached the limit, then tell you that it is hopeless to completely unlock this 8700. Hurry up and change;
8, screen resolution, brightness, color, etc. Pay attention not only to whether there are scratches on the screen, but also to whether the brightness of the screen is uniform, especially in the lower part, whether there are light spots caused by uneven distribution of light sources; Then look at the color of the screen lights. The standard should be natural light, yellowish and close to sunlight. Foreigners admire nature. If it is pure white or pure blue, although the screen brightness is very good, but I tell you, this is definitely not an authentic BB screen. Change the channel quickly, and the blackberry screen can also be refurbished. This is by no means news. The transformation contents include surface glass, back lighting, back reflective and refractive materials and so on.
9. System running log of the machine: The main screen Altlglglg can enter the machine log viewer, which records all the logs of BB running. If you see an entry in black italics, it is an error record of running a program on the machine. Be careful and see what it is (scroll to this and press Enter to enter), which contains the wrong software module name. If you are not familiar with BB, I can't teach you. Anyway, as long as it's not phone, SMS, wireless, internet, etc. Generally, it is a software problem, so don't worry too much, because most people will brush their own machines, and they will be fine after brushing these things;
If it is normal in the future, remember to press the wheel to find the option here, and remove the tick mark in front of the content that does not need to be tracked (just press the space after the wheel reaches each item), so as to save BB from taking up too much memory when writing the work log in the future;
10, earphone, receiver, vibration: this is the most basic function of mobile phone. You must try. Anyway, you have convinced the boss to turn it on. Why not give it a try? Then see if the machine can sleep with a magnet.
That's almost enough. Ask the questions mentioned above if you don't understand them.