If you own a (the Japanese docomo variant of the Xperia XZ Premium), you know the frustration. You bought a great deal on a second-hand device, only to find it screaming for a "SIM network unlock PIN" or "Network restriction" code. Unlike global models, Japanese carriers (NTT Docomo) lock their phones aggressively.
The Sony SOV33 uses a stored on the modem partition (specifically modemst1 and modemst2 ). When you insert a non-docomo SIM (T-Mobile, Vodafone, Airtel, etc.), the phone checks a flag inside the modem firmware. sony sov33 lock remove ftf hot
The risk is low. Unlike patching the kernel, the hot FTF only rewrites the modem. If it fails, you simply flash back a stock docomo FTF. The SOV33 is hard-brick resistant. If you own a (the Japanese docomo variant