Which means 4B on the display of the tablet Sony Xperia tablet Z2?

Broke the screen on the tablet Sony Xperia tablet Z2, zakazl new display, and noticed that on the back side of the display(for aluminum surfaces) labelled: "4B", new display, and there on the back label: "3B", would like to know what are the differences between 4B and 3B, and I also noticed that there are "4C", "5B", etc?
July 9th 19 at 10:48
1 answer
July 9th 19 at 10:50
The different revisions of the display. Compatible search on specialized forums.

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