Step 1: You need to know about BlackBerry, including its current domestic market channels and status. How did Blackberry find you? Is it brand-new all-inclusive Is it a brand-new motherboard to China and then a brand-new shell and accessories? Is the so-called 14 secret true or is the problem motherboard and scrapped motherboard pieced together like writing a paper? Knowing this will help you to buy BlackBerry with a correct attitude and have a rational thinking.

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 pay attention to taking screenshots of the 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.

Look at the screen Can the operator correspond to the operator of the mobile phone body? 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.

See if it matches the battery box. 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%, and try headphones, if any:

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, please mark a serious problem *

14. Check whether the warranty label is consistent with the name of the seller's store 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 there is a bad reputation, mark the serious problem.

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, but 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 can sell their mobile phones to their satisfaction.