What One UI 7 changed
Android 15 / One UI 7 closed the remaining userland escape routes that survived into Android 14. Any guide built on Emergency Call, dialer codes, or setup-wizard sideloading is dead on an updated S24 Ultra.
The firmware-level route is unaffected. Samsung's Download mode is a pre-Android service interface, so an FRP policy change in Android cannot remove it.
Verify which Android version you have
A phone that shipped on Android 14 may or may not have taken the Android 15 update. The methods available genuinely differ, so confirming the version first saves a wasted attempt.
FRPB reports the device properties it can read in Download mode, which is a more reliable signal than the version the seller claimed.
The procedure
Download mode entry is Volume Down + Power, then Volume Up to confirm the warning. FRPB verifies the transport, matches the reported chipset to the right payload, writes, and reboots.
Keep the device connected throughout. Interrupting the cable mid-write is the main self-inflicted failure and can require a full firmware reflash to recover.
If the write is rejected
Samsung firmware will refuse a payload that does not match the device's signing state or region. FRPB surfaces that rejection verbatim rather than retrying silently.
A rejection is a firmware policy answer, not a tool error. Re-check the detected chipset and region before trying an alternative route.
Step-by-step procedure
Follow the sequence below in order. Each step is also published as structured HowTo data, so search results can surface it as a step-by-step list.
- 1Power the S24 Ultra off completely.
- 2Hold Volume Down + Power, then connect the USB cable.
- 3Press Volume Up to confirm Download mode entry.
- 4Confirm FRPB reports Download mode and the correct chipset.
- 5Run FRP Bypass and accept the authorised-owner disclaimer.
- 6Monitor the console through the write and reboot.
- 7Confirm the device reaches the setup wizard.
Safety, legality and when to stop
FRPB is intended strictly for authorised device owners and licensed repair professionals. You must own the device or hold explicit written permission from its owner. Using an FRP bypass tool on hardware you do not own may defeat an anti-theft control and can be illegal in your jurisdiction.
Stop and reassess if the device reports a bootloader state you did not expect, if the model or chipset FRPB detects does not match the handset in front of you, or if the operation halts mid-way. A mismatched firmware package is the single most common cause of a hard brick — abandoning an operation is always cheaper than recovering from one.