Sony provides a dedicated Bootloader Unlock service for developers. You can check eligibility by dialing *#*#7378423#*#* and navigating to Service info > Configuration > Rooting Status .
For network/SIM locks, the most reliable and legal way is to contact your original service provider . Most carriers will provide an unlock code for free if the device is paid off. Sony provides a dedicated Bootloader Unlock service for
For screen lock issues (forgotten PIN/Pattern), the Xperia Companion software can perform a "Software Repair" to reset the device, though this erases all data . Most carriers will provide an unlock code for
If you are looking to unlock your Sony device, it is highly recommended to use official or verified professional methods: It is not a modern "one-click" solution for
This is an older, legitimate utility primarily used for bootloader unlocking on older 2011-era Xperia models like the Xperia ARC, Play, and Neo. It is not a modern "one-click" solution for all current Sony devices.
The search for an reveals a mix of older legacy software, paid technician tools, and unofficial methods that carry significant security risks. There is no official, current "all-in-one" free tool from Sony that provides a 100% working online unlock for all models. Key Findings on Sony S1 Unlock Tools