В корзине пусто!
refers to software or services that remove a carrier lock (e.g., T-Mobile, AT&T) so any carrier's SIM card works.
The legality of unlocking a phone varies by region.
Flashing firmware carries risks, including permanently "bricking" your device. To stay safe:
Using Odin for SIM unlocking is a high-risk activity if not done correctly.
When a Samsung phone is "carrier locked" (e.g., locked to T-Mobile or AT&T), a specific flag or code is stored in a protected partition (often the PREF or EFS partition) instructing the modem to reject SIM cards from other networks.