Why the S24 Ultra will not accept the old FRP tricks
The dial-code and Emergency Call shortcuts that circulated for the S9 through S10 generation were closed off years ago. On the S24 Ultra's One UI 6 (Android 14) and One UI 7 (Android 15) builds there is no reachable settings surface from the FRP screen at all, so those walkthroughs end at a dead tap.
What remains is the firmware path. Download mode sits below the operating system and is always reachable with the hardware keys, and the device will accept a correctly signed payload there. That is the transport FRPB drives — no USB debugging, which an FRP-locked phone cannot enable anyway.
Confirm the variant before you write anything
Samsung ships the S24 Ultra with a Snapdragon 8 Gen 3 for most regions and an Exynos 2400 for others. The two take different payloads, and flashing the wrong one is the fastest way to turn a locked phone into a brick.
FRPB reads the USB descriptor and the device properties and reports the detected chipset before writing. If that report disagrees with the model printed on the back of the handset, stop, change the cable and port, and let detection run again rather than forcing the operation.
Entering Download mode on a locked S24 Ultra
Because the phone cannot boot to Android, the recovery screen is unreachable — but Download mode is not, which is exactly why this route survives an FRP lock.
If the key combination seems to do nothing, the device is almost always still powered on. Hold Power until the screen goes fully black, wait five seconds, then immediately run the Volume Down + Power sequence while inserting the cable.
- 1Power off fully — confirm the screen is black, not merely locked.
- 2Hold Volume Down and Power together.
- 3While holding both, plug the USB cable into a direct port.
- 4Release when the Download-mode warning screen appears.
- 5Press Volume Up to confirm and enter Download mode.
Running the FRP bypass in FRPB
Once the handset is in Download mode, FRPB performs the same sequence a service centre would, with the state checks and logging automated: it confirms the transport, matches the detected chipset to the right payload, streams the write, then reboots the device to the setup wizard.
Every command and every line of tool output is streamed to the console rather than hidden behind a progress spinner. If a step fails you see the raw error, which is what makes an unexpected result diagnosable instead of mysterious.
Common failures on the S24 Ultra
A write that fails part-way is nearly always one of three things: a charge-only cable dropping the link, a USB hub sitting between the phone and the PC, or antivirus blocking the bundled tooling. Connect directly to a rear-panel port and retry before concluding the device is unsupported.
If FRPB reports the chipset as Unknown, the driver did not bind. Install the Samsung USB driver from the FRPB Driver Center, reconnect, and let detection re-run — do not force the operation through with an unknown chipset.
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.