Compatibility
Case compatibility with a specific mobile phone model — or, in the case of universal models, the absence of any specialization. Both options have their advantages and disadvantages.
Specialized variants are much better compatible with the corresponding mobile phones, as initially "tailored" for the features of a particular device: the shape and dimensions of the case, the location of connectors, buttons, cameras, etc. As a result, the cover provides protection without creating inconvenience for the user and without limiting his capabilities. And some types of cases (see "Type"), by definition, are made only specialized. At the same time, not all models of mobile phones are awarded such an "honor" as the release of a specialized case. And if your device is relatively inexpensive, the probability of not finding a case for it is quite high.
Note that it hardly makes sense to try to choose a specialized case based on the similarity of dimensions: firstly, very few devices match in size up to a millimetre, and secondly, even with such a coincidence, compatibility of connectors, cameras, etc. is not guaranteed at all due to lack of correspondence of cutouts for them and other structural elements of the phone. If the description indicates compatibility with several models at once, this means that the case is available in several modifications, for the corresponding devices.
Universal covers, in turn, are not limited by specific models and can be u...sed with any mobile phones that fit in size. Moreover, the size can coincide very approximately — the main thing is that the phone, on the one hand, fits inside, on the other hand, it is not too small and is not loose in the main compartment. At the same time, only cases intended for transporting a mobile phone are universal (bags and cases, see “Type”); the ability to use the phone without removing it from the case is the prerogative of specialized options.
Window
The window is a cutout in the part of the cover that covers the screen. This cutout allows the user to see notifications on the display and, in some cases, control certain touch screen features without having to open the case and take out the phone. The reverse side of these possibilities is a somewhat reduced degree of protection of the device — especially if the window is not covered with a transparent material and is actually just a literal hole.
This feature, by definition, is found only in those models where a screen protector is provided — most often in flip cases, but other options are also possible (see "Type"). The optimal location of the window for different devices will be different, so covers with this feature are made specialized only (see "Compatibility").
Weight
The weight of the case is determined by its material, as well as the form factor. Shockproof pads, as well as book cases, have the biggest weight. Heavy materials include metal, polyurethane and rubber. By reducing the weight of the case, the overall level of aesthetics of the mobile device improves.
