Try all the functions (watching videos, searching for GPS stars). When the N85 is initially powered on (that is, a new phone), it will display 2 running programs: 1 menu, 2 standby state. Press * #0000# Pay attention to check whether there are any bad pixels on the screen. Enter *#7370925538 in standby mode. To initialize the electronic wallet, enter *#7780 in standby mode. #Restore the factory settings of the phone (original password 12345. Enter *#7370# in standby mode to format. Mobile phone (original password 12345) Enter *#0000# in standby mode to view the software version number. Enter *#06# in standby mode to view the IMEI number of the mobile phone. Enter *#2820# in standby mode to view the Bluetooth device serial number. *#92702689# Check the total call time *#62209526# Check the WLAN MAC address. The easiest way to distinguish between parallel imports, high imitations, and copycat phones is to try the pixels. All high-end Nokia cameras are certified by Carl Zeiss. , the photo effect is amazing. Of course, this camera is expensive, so fake ones generally don’t use such expensive cameras. This is one of the reasons why Nokia’s high-end phones are expensive. Another factor is the response speed of the phone. Sometimes, the screen shows card issuance and there is a stagnation phenomenon. Finally, please remember that good products are not cheap, and cheap but not good products are all made in China. Some parts are imported. It is useless to click on those high imitation machines. It's exactly the same as the professional ones, but it's difficult to tell after-sales service. As I said, try the pixels and see the response speed (actually, try the mobile phone CPU). High imitations will not be willing to spend so much money to import products certified by Carl Zeiss. For cameras, just remember this and pay special attention: The difference between English-modified phones and refurbished phones. English-modified phones, or European version phones, were originally sold to Europe and the United States and other countries, and were smuggled into the mainland. By upgrading the mobile phone software, they Simplified Chinese is supported. Since no tariffs have been paid, the price is often much lower than that of regular phones. It is difficult to tell the difference between European parallel-imported phones and Hong Kong-made phones. Just go to hypermarkets such as Suning and Gome to buy a genuine phone without worrying about saving money. In standby mode, enter *#06# to obtain the IMEI code, then compare it with the IMEI code on the trademark on the back of the phone (usually under the battery), and then compare it with the IMEI code on the box. The three-digit combination can basically guarantee that it is the original battery of the new phone. 1. Outer skin: The color of the packaging skin of the original battery is relatively dark, which is matte paint. The color of the assembled battery is brighter because it contains phosphor powder in the middle. The outer skin of the original battery is delicate and has a frosted feel. When viewed from the side, it has fine and even needle-like reflections. , the packaging leather feels good and smooth, but the assembly feels rough. The original BL-5C has a small dot next to the contact, but the BL-4C does not. This is very important, so please pay attention. When you buy a battery, you can use your fingernail to push the edge of the packaging skin. The original battery will not peel, but the assembled battery will certainly. 2. Contacts: The color of the original electric contacts is matte and not bright. The battery will have scratches after one use. If you find some small mesh squares on the metal sheet of the battery, then this battery It's just a copycat. 3. Serial number: If you buy a lot or choose in person, if the serial numbers of the batteries are repeated, it must be a fake battery. 4. Black part: Check the black part on the battery head. There is only one black border on the top. The original battery is made of rubber-like material. If you pinch it with your fingernail, it will feel a little soft and there will be marks and then disappear. . The black part on the head of the fake battery is made of hard plastic and cannot be pinched with fingernails.

5. Battery workmanship: All the letters, numbers, etc. on the counterfeit copies are almost the same as the original ones, as well as the battery capacity, production date, etc., and even the manufacturers are the same. However, the packaging outside the counterfeit copies is not as clear as the original ones, and the fonts are also smaller than the original ones. It's vague, but not very obvious. It's easy to buy it seriously, unless you have a real battery to compare. 6. Holographic label: If there is a holographic label on the counterfeit Nokia BL-5C battery, you can prove it by looking at the holographic label. When you look at the holographic label, you can see the Nokia hands-joining logo from one angle, and from another angle. See the Nokia Original Accessories logo. When you tilt the holographic label left, right, down, and up, you can see 1, 2, 3, and 4 dots on each side of the logo respectively. 7. Appearance: Regardless of whether the original battery is English or Chinese, the appearance is the same, with rounded edges and the same size. Due to the mold, the appearance of the counterfeit battery is definitely different from that of the original battery. Some are larger than the original battery, some have a different shape of the black part of the battery head, and some are square and angular, so they must be fake batteries. Attached are the two websites, IMEI code query www.chinamobile.gov.cn and network access license query www.tenaa.com.cn. If the above two websites can be checked, it can be basically confirmed that it is licensed. In fact, the easiest way is to bring it with you Go directly to NOKIA customer service for the invoice and warranty card and you will get the result within 1 hour