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HFZ Ramdisk Universal

Promotion image of HFZ Ramdisk Universal article.

Checkm8 exploit serves various functions, including jailbreaking, enabling dual OS, or bypassing the iCloud Activation screen. It achieves this by permitting code execution exclusively when you connect your iPhone in DFU mode to your PC via a USB cable. In the case of HFZ Activator Ramdisk, it harnesses the Checkm8 exploit to effectively bypass the iCloud Hello Screen, ensuring signal support throughout the process.


  • To bypass iCloud Activation on devices such as iPhone 6 – iPhone X you can use HFZ Ramdisk Universal on macOS, or HFZ Activator Ramdisk on Windows.
  • There are non-Legacy iOS iPhones compatible with the latest operating system by Apple – iOS 17. iPhone XS and newer are not supported.
  • After Activating your iPhone using this software you will also enable signal. It means that the carrier SIM card will be fully functional on the device.
  • HFZ Ramdisk Universal supports the latest releases of iOS 15.6.1 and iOS 16.6.1. To activate your checkm8 device a USB connection to a Mac or PC is required.


HFZ Ramdisk Universal 3.8.6 is a dedicated iCloud Hello Activation software for Windows. However, users running a Windows PC can download HFZ Activator Ramdisk. Click on the 'Download now' button and reveal the links for HFZ Ramdisk Universal and Activator Ramdisk.

What is HFZ Activator Ramdisk?

HFZ Activator Ramdisk is the premier iCloud Hello mode Activation tool that comes complete with full signal support. With this tool, you can now make phone calls from bypassed iPhones. It's compatible with a wide range of Apple devices, spanning from the iPhone SE to the illustrious iPhone X, and it effortlessly handles the latest iOS versions, including iOS 15 – iOS 17. Additionally, HFZ Activator Ramdisk extends its support to a variety of iPads.

HFZ Ramdisk Universal Hello Mode Activator is now available on both Windows and macOS platforms. This versatile tool equips you with the necessary resources and exploits to efficiently bypass the Hello Screen and activate your device while ensuring signal support.

iCloud bypassed iPhones or iPads using HFZ Ramdisk to provide users with a fully functional system. This includes seamless access to iCloud, the ability to update, reboot, utilize Apple Pay, access the App Store, skip setup processes, receive notifications, and enjoy uninterrupted use of FaceTime and iMessage. The latest iOS 15.7.8 and iOS 16.6 are compatible.

HFZ Activator Ramdisk screenshot.

HFZ Activator Ramdisk also offers the capability to block OTA updates, enabling you to fend off Apple's forced updates to your installed iOS system. Furthermore, it provides an option for device erasure and the ability to verify the SIM lock status of your iPhone.

The database for both HFZ Universal Activator and HFZ Ramdisk Activator is integrated. The API remains consistent with the HFZ Universal Activator, eliminating the need for additional settings.

What's new

  • Added all iOS supported 15-16-17; no need make restore your device's last version.
  • Carrier locked devices are now supported for signal bypass (with Rsim).
  • Fixed sudden app crash.
  • Added separated buttons for Erase, Ota Block, and Fake reset.
  • Carrier-locked devices are now supported for signal bypass (with Rsim).
  • Fixed sudden app crash.
  • Added separated buttons for Erase, Ota Block, and Fake reset.
  • Overall improvements and bug fixes.
  • Added more checkers for devices.
  • Added more error handlers.
  • Fixed tool crash after boot for a couple of devices.
  • Fixed error on iOS 16.6 with Network/Signal.
  • Added support for iOS 16.6.

Here's the simple process: First, connect your iPhone or iPad running iOS 15 – iOS 17 in Hello Mode to the tool to check the Sim-Lock status. Afterward, you can effortlessly add your serial and commence activation for HFZ Activator Ramdisk for Windows or macOS.

HFZ Activator Ramdisk is available as commercial software, with pricing ranging from $12 to $40 USD, depending on the type of device you own. Please note that unlocking newer devices with signal support may incur higher costs. iPads MEID with signal can be unlocked for $12.

The developer also released HFZ Activator Ramdisk without signal, at a lower price. If you require a free tool to bypass iCloud with signal support, there is SkyNet Ramdisk tool, an iCloud activation solution tailored for checkm8 devices running iOS 15 – iOS 16 on A7-A11 processors.

Supported devices

HFZ Activator Ramdisk extends its support to encompass all A7 – A11 systems on a chip. Refer to the following list for the precise compilation of compatible iPhones and iPads (2013 - 2019) (Cellular models) with the iCloud bypass tool for iOS 15 – iOS 16.6. Below, you can find the actual list of all supported iPhones by the most recent release of HFZ Activator Ramdisk.

A7iPad Air 1st gen (Cellular Model)
A8XiPad Air 2nd gen (Cellular Model)
A8iPad Mini 4th gen (Cellular Model)
A9XiPad Pro (12.9-inch) 1st gen (Cellular Model)
A10XiPad Pro (12.9-inch) 2nd gen (Cellular Model), iPad Pro (10.5-inch) 1st gen (Cellular Model)
A9iPhone 6S, iPhone 6S Plus, iPhone SE, iPad 5th gen (Cellular Model)
A10iPhone 7 and iPhone 7 Plus, iPad 6th gen (Cellular Model), iPad 7th gen (Cellular Model)
A11iPhone 8, iPhone 8 Plus, and iPhone X

How to use HFZ Activator Ramdisk

HFZ Activator Ramdisk is now available for Windows PCs. For those seeking macOS compatibility, we recommend HFZ Ramdisk Universal. Both options can be downloaded from the links provided at the top of this page. Regrettably, please note that devices from iPhone XS onwards and those running an iOS version below 15 are not supported by this tool.

  1. Download HFZ Activator Ramdisk and install the software.
  2. Connect your iPhone to a PC using a USB cable.
  3. Open HFZ Activator Ramdisk application.
  4. The activation tool will determinate SIM Lock status and GSM support.
  5. Press on boot device and enter your iPhone into DFU mode.
  6. From the Hello Screen, press Activate Device in HFZ Activator Ramdisk.
  7. Once the device is rebooted, activate the device on iOS.
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Written by

Kuba has over 20 years of experience in journalism, focusing on jailbreak since 2012. He has interviewed professionals from various companies. Besides journalism, Kuba specializes in video editing and drone flying. He studied IT at university before his writing career.

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