For "standard" Android devices like the Google Pixel, OnePlus, or Nothing Phone, a SIM card is . These devices rely on a direct connection to a computer. Prerequisites
: Power off the phone, then hold Volume Down + Power while booting. how to unlock bootloader without sim card
Short answer: , but it depends on the brand. Here’s the breakdown: For "standard" Android devices like the Google Pixel,
: Instead of the phone "phoning home" via mobile data to verify account binding, the manufacturer provides a one-time unlock token through their official web portal using the device's IMEI and Serial Number. Short answer: , but it depends on the brand
Important: unlocking the bootloader may void warranty, erase all data, and can brick your device if done incorrectly. Back up any data you can before proceeding.
An ideal system would allow users to unlock their bootloader without a SIM or active cellular connection by using a pre-generated, device-specific token.