There is not much difference in hardware. The main thing is that the China Unicom card used by DI has a video call function. If you use a mobile card, there is no such thing. 5320XM has been discontinued.

DI should be customized by China Unicom. No movement.

The following suggestions are available for licensed products.

1. First check whether the outer packaging is new and intact. If the outer packaging box is relatively tattered, then don’t try this machine and just ask for a replacement one.

2. Box stickers, everyone who has bought licensed products knows that there are triple stickers A, B, and C on the box, among which sticker B is affixed to the warranty card. If the triple stickers have been torn off or pasted on like, , then this is most likely a machine returned to the factory, because the motherboard has been changed, and of course the serial number of the mobile phone has also been changed. The sticker must be applied later

3. Check the condition of the inner liner in the box. It is the paper (and also plastic) packaging used to fix the mobile phone and its accessories in the box. If it is older, then the chance of it being a repair machine is greater

4. This is also more critical ( Especially Nokia mobile phones), the outer packaging of the machine has a plastic-like sticker with the same serial number as the phone body. If it is inconsistent or missing, at least it can be said that the machine has been tampered with.

5. Everyone is familiar with this. Check whether there are any scratches on the fuselage, whether the screws have been tightened, check the total call time, and whether there are any photos or videos in the machine other than the machine itself. Wait