The IMEI is essential because the unlock code is generated specifically for your device's hardware. You can find it using any of these methods:

: Open the Phone app and dial *#06# . The 15-digit number will appear on your screen immediately.

: If you still have the box, the IMEI is often printed on the side label. Step 2: Choose a Reputable Unlocking Service

To buy an unlock code for a Samsung Galaxy S5, you must first obtain your device's unique 15-digit and then purchase the code from a reputable third-party unlocking service . Unlocking a phone that is off-contract or paid off is legal and does not void your warranty. Step 1: Locate Your IMEI Number

: Remove the back cover and battery; the IMEI is printed on a sticker underneath the battery.

: Go to Settings > About Device > Status . Scroll down to find the IMEI.