How to find out if there is a Jailbreak on Kindle 5?

Question

Electronic books

I bought Kindle 5 in a store that inspires confidence (at least all-Ukrainian sit down), it was indicated there that "Russian language, without advertising." In view of the fact that I did not want to pick the device in order to remove ads, and the markup in this store was less than the price of the official disabling of advertising, I bought it there.

The box was unpacked, but then closed with a special barcode sticker from the store. I understand for Russification.

There was a version of the Kindle software, sort of like 4 with something there, but it became 4.1.1. Updated itself via Wi-Fi after registration. The ad didn't show up.

After the update, the Russian language was half off. Switched to English - it does not matter.

I wonder if the device has been jailbroken? How can you find out?

Answer 1

Russification is not installed without jailbreak, so it is logical that the jail did.
Jailbreak is required to enable access to the system via usb.
At the Kindle 5 itself, firmware 4.1.1, Russified, advertising was disabled in those. Amazon support for free.

Answer 2

If you need to get the device as “from the factory”, then you can use the firmware recovery with a complete erasure of everything ( link ), after which you will receive a book that, after turning it on, will ask you to select a language, an Amazon account, and so on ...