Identify Samsung i9300 refurbished machine (applicable to all Samsung mobile phones)
1. Factory date query method:
The first method: enter the dialing input*# 197328640# Enter the engineering mode; select the second item, the second item, and the fourth item in sequence, click the menu key, then click Key Input to enter the value 2; click the menu key again, click Key Input to enter the value 2; then click the menu key, click Key Input to enter the value 4; You can see cal date: display the factory date.
The second method: s/n calculation, the 4th and 5th digits of s/n are the year and month, the 4th digit: C represents 2012, the 5th digit: 123456789abc represents January to December ( Normal cal time and sn time should be in the same month)
2. Look at the call time:
*#*#4636#*#* This is based on the call time in 1 minute It is normal if it is less than one minute (one minute is not considered normal and can be used to guess whether it is a repaired machine or something)
3. Test whether there are three lock keys and the number of flashes:
Volume down button, HOME button and power button. If the animation of a robot digging coal can appear, the three keys are unlocked. Otherwise, the three keys are locked.
Just turn off the machine; press the HOME button in the middle of the power button, volume down button button, wait for the flash mode to appear, and then press the volume up button to view the information. It will show whether the phone has been flashed. If the phone has not been flashed, the third line will say NO. If the phone has been flashed, it will say YES and The number of swipes. After the check is completed, press the power button for ten seconds to exit the mode.
4. Test whether there is a network lock
*#7465625# This is to see if the phone is locked. As long as it is OFF, it is normal. The value of "network lock" is "disable", which means there is no network lock, and the value "enable" means there is a lock. Another method is to check the version: *#1234#, if it displays: PDA: I900DZHG1/DZHG1.
Mobile phone: Samsung i9300NSPRO must be locked.
5. Identify the country of origin of the machine
The first method: In standby mode, click the dial button
Enter : *#1546792*#, then enter the project mode, select Preconfiguration. You will be prompted to enter a password. Enter: *#81230*# and confirm.
If JS has not changed the "select a counrty" column is the country of origin of your machine. From this, you can identify whether it is the Hong Kong version, the European version or the Asia-Pacific version.
If the first method does not respond and cannot be used, you can try the following method
p>
The second method: Enter the dialing interface. To know the IMEI, you only need to enter *#06# to find it. Then immediately check whether the box barcode and the body IMEI are the same, and then enter *#272*[IMEI]# , 3 letters will appear, which is the place of sale, for example, TGY, which represents Hong Kong (this command can switch the location attribute of the machine, so choose to switch carefully)
6. Screen detection:
*#0*# Engineering test must be tested when buying a machine
Three primary color tests in the first row
Second row 1 earpiece 2 vibration 3 brightness reduction
Third row 1 Camera 2 Magnetic sensor 3 Touch screen
Fourth row 1 Sleep mode 2 Speaker 3 Accessory keys
Fifth row 1 Front camera 2 LED indicator
There is "LCD TEST" inside. Press "RED" to display red in full screen. Press "green" to display full screen in green. Press "blue" to display blue. If you want to return to the test menu, please press the confirmation key in the middle. To exit, press hang up. key.
7. IMEI code verification:
Enter *#06# to view the IMEI code in the phone’s memory, remember this number, and then enter *2767*3855# to perform i9300 chipping After reset, the phone will automatically restart.
Finally, enter *#06# to check whether the IMEI code has changed. If this number is consistent with the IMEI code on the back of the phone or the outer packaging box, and the model is approved If the number is consistent with the model of the mobile phone,
it proves that it is an authentic product from the original manufacturer. If it is inconsistent, or turns into a string of garbled characters, it proves that the phone is either a modified machine or a refurbished machine. If the command is not executed, it means that the chip reset function has been blocked by
JS. Remember: this operation is equivalent to hard restarting the phone, make a backup.
8. Other aspects
The appearance, front and rear cameras, battery, touch screen and other inspections do not have much technical content, just I won’t describe them one by one.
Purchase inspection:
1. Carefully check whether there are any marks on the screen, whether there is any dust on the data cable, headphone jack, speaker hole, and strap hole
4. Smell the smell. The new machine has sandalwood, which will dissipate 10-12 days after purchase. This smell is different from the smell of general detergents and perfumes. There should be no sticky wax and oil on the body ( If there are any, they have been beautified by the merchant)
5. Carefully check the SIM card contact points and whether there are any wear marks on the battery contact points of the fuselage
6. Look at the gaps at the seams of the casing Is it even and below 1MM? Are there any pry marks? Are there any pick marks at the two sealing points under the screen inside the upper cover?
7. Compare the elasticity of the buttons and the brightness of the internal and external displays with the new machine
8. Carefully check whether the fixing nails of the fuselage are rotated, painted and inked (you can use a magnifying glass), and whether there are prying marks on the trademark.
9. Look at the scratches on the film. The new machine has It is an integrated film, there will be absolutely no bubbles in the original film, and there are no scratches on the machine
10. Look at the production date, the purchase time and the production date will generally not differ by 2 months. If the difference is too big, It is suspected to be a renovation