Use the free checker to enter your IMEI, select the phone’s original country and network, then press “Check my device”. It checks the IMEI format and may show a likely catalog model; it does not confirm carrier lock status.
Service menu code *#*#7378423#*#* shows “Rooting status” and network lock details on many Xperia models.
In most countries, unlocking a phone you own to use another network is legal. Contract terms with the original carrier may still apply.
An official network unlock doesn’t modify the software, so it normally doesn’t affect the manufacturer’s warranty.
No. Account locks (Apple ID, Google FRP, Mi Account) protect the owner. Only the owner can remove them with their credentials or proof of purchase.
Dial *#06#, look in Settings → About phone, or check the SIM tray or original box.
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