Lenovo Tab 4 TB-7504X

Advantages: All that is not flawed.

Disadvantages: Short time. It is difficult to get a native cover.
The combined slot does not allow to use two SIM cards with a memory card.

Comment: Immediately from the box, the caller crashed - but the problem was solved with the update.

Advantages: First of all - the size. The tablet is very comfortable in the hand, it is very light, thin and compact.
Bright high resolution screen. The colors are really awesome. The screen is responsive, it responds easily to touch.
Good battery capacity. Enough for a long time, even with the constantly turned on Internet and video viewing.
Good, fast processor.
Updates "by air" and the latest version of Android 7.0
4G availability

Disadvantages: The compactness of the tablet is its disadvantage, the tablet is really very thin, you need to handle it very carefully.
Not enough RAM, 1 GB, now it is not enough for comfortable work, but there is an option with 2 GB, it is preferable to purchase.
16 GB of internal memory is also not as much as we would like, but there is a slot for a memory card.
A typical main camera with low resolution and a rather weak front camera.

Comment: Budget tablet, compact and pleasant to work with a very good screen and capacious battery. It is perfect for surfing the Internet, watching videos and using maps and navigation. It can be used with the holder in the car, the tablet is light and small.

Advantages: The main advantages I would like to include: 1.) Great design. 2.) Speed. 3.) Excellent graphics. 4.) Well pulls games and does not hang. 5.) Slim body. 6.) Powerful processor

Disadvantages: The main drawback is the unified slot for both sim and memory card.

Comment: Acquired as a gift for the new year for a child-student. First of all, I was pleased with the design. Solid black body and very thin. The second thing that surprised is the speed and a lot of memory. Very good pulls the game and does not hang. To be honest, from “Lenovo” did not expect.

Advantages: Android 7.0. When first turned on, it was updated, after a couple of days it was again updated. Almost no garbage in the form of non-erasable programs.
Qualitatively assembled, pleasant "soft-touch" body, looks good. For 7 inches is very compact. Fits into most pockets. The case is not slippery, the screen looks like it has an oleophobic coating (unlike the younger models TB-7304 of the same Tab 4 series). There are practically no prints.
2 sim cards.The presence of 3G and LTE, can be used as a phone, there are proximity sensors and light (work well). The sensitivity of the phone is average (one division less than on the phone with the same operator). There is a bug at the phone. directory: if you sort the list by last name, and the names of subscribers start with the last name, then the dialer crashes and gives an error, but the SMS does not come (it is treated with a third-party contact type +).
Wi-Fi and Bluetooth without any complaints.
Smart GPS. Positioned quickly, even with a "cold" start. Accuracy is not perfect, but it deserves a solid 4 (it is suitable for navigation without problems, unlike the Tab3 series, which had a problem there).
The volume is sufficient for use in the car (but without stock). The clarity is excellent. There is a dolby atmos. The sound quality in the headphones did not check.
The average speed is acceptable for "domestic" needs (I use it in the car: car launcher ag, navigation, radar detector, inclinometer, megaphone-tv, internet. Sometimes all at the same time, some of the programs in the background work). A half-second hitch at the start of programs (affects 1GB of RAM), then everything goes smoothly and without braking. No flights. Games have not tried, but I think that is not his option.
MicroUSB with OTG function. When charging, it is almost not heated even under good load. When using the maximum brightness manages to charge. Autonomous work is quite good (subjective assessment, I can’t give specific figures).
There is still a mode of several users (Multiuser, i.e., as in "Windows": several accounts on one computer). Not sure what is useful, but the device can.

Disadvantages: Of the 16GB, only 11 are available for recording software. In principle, it suffices if audio-video is written to an SD card. (On younger models from 8GB only 3 are available). Programs on SD "move."
2 SIM cards or 1 SIM card and memory card.
Cameras do not even want to comment. 5m and 2m. Crap for a tick.
Phone and SMS give an error. It is treated by a third-party program.
MicroUSB (it's time to switch to type-C). Charging is sooo long. Highly. Maybe it seems comparing with my phones with quick charge. Charger only 1A. Strange decision.
Brightness without stock. The sun becomes dumb.
No hdmi.
One speaker. He is for calls, he is for hands-free calling, he is for movies and music. Full monomony ...
Incomplete battery. Well, it's like everyone else (but I would like to ...)
The set in the box is poor as an ascetic life: the device itself, the charger and the cord. And that's it! No, not that the protective film or glass - there was not even a factory film covering the display.

Comment: Very good option for the money. If you do not play, then I think that the buyer will be satisfied. Perfect for my tasks.
It’s a good machine, but it still feels that almost nothing left of that very IBM’s IBM Lenovo, now it’s just China’s consumer goods, albeit mostly of decent quality. There is one more plus, although indirect and not directly related to this device: Lenovo’s customer support by phone really works and works very well, and this is important.