If it is a brand-new machine, that is, the purchase date and activation date are the same day, there may be a one-day time difference. The US version of Shuikou will be activated in advance, usually within 3 months.

If it is used or refurbished, there is no guarantee that the warranty period has expired or the activation time is too long. Machines that have passed the warranty period show that the activation date is more than one year, so the detailed activation date cannot be found.

In case of machine replacement, that is, after-sale replacement, the activation date is usually earlier than the production date, and the serial number usually starts with C3K, CCP, DQG, C28, etc.

Extended data:

Identification method of Apple mobile phone refurbished machine and new machine;

1, shell

The shell of the new machine is tightly attached, and the gap is smooth and smooth without burr.

Refurbishers generally use imitation original shell, with uneven gaps and burrs. The upper and lower parts of the mobile phone shell are easy to be closed loosely, leaving a large gap.

When recognizing, you can try to insert a small nail into the gap between the upper and lower covers of the mobile phone. If it can be plugged in, it is a refurbished machine. The surface of the shell is frosted like a new machine, and the mobile phone with small particles is absolutely not to be purchased.

The paint on the machine shell was sprayed by JS. After a long time, the paint will fall off (the dust particles on the shell are caused by the operation without vacuum environment when painting).

2. The shell of the new machine has a faint sandalwood smell.

If it is a refurbished machine, JS generally needs to beautify the fuselage. Although the appearance is smooth, it is not dry enough. After opening the lid or taking out the battery, it smells like rubber, plastic or chemicals.

3. Keyboard and data line interface

Due to the long-term plugging and unplugging of the charger plug and data cable, there will be black scratches on the charging interface of the refurbished machine that are difficult to eliminate. Keyboard refurbished machines mostly use the keyboard on the old machine or imitate the keyboard.

The * * * of this keyboard is that it feels soft and has no toughness of the new keyboard;

4. Charging test

It is best to charge for a long time, generally 10 minutes or more.

Because there are many refurbished machines that will run out of power after a long charging time. This is also a very effective method to judge the refurbished machine;

5. SIM card chip contact and battery contact

Generally, two contacts JS cannot be replaced. If it is a refurbished machine, there will be obvious friction marks on the contacts of the SIM card chip, which looks shiny, which is caused by too much friction. If it is an unused chip of a new machine, the contact surface should be frosted;

6. Fixing screws

Mainly depends on whether there are obvious scratches at the interface between the screw and the blade, and whether there are pick marks on the two rubber pads below the inner screen.

7. Call quality

Bring your own SIM card for trial operation. Call a friend, preferably a landline, and ask the other party how the call quality is, whether the call sound is clear, whether there is noise, current sound and whether the volume suddenly drops.