After iOS 8.3. has not been released for a long time, ios8.4 beta 1 has also been released. In the update of Aisi Assistant, the iOS 8.4 test version is also supported, and the mobile phone data will not be lost after the machine is saved. Account activation can be directly used below to introduce you to the Ai Si assistant iOS8.4 Beta1 Brush tutorial This brush machine tutorial is used to use all the iOS device to use the Ai Si assistant to brush; only need to download different firmware can be; iPhone4S and above Mobile phone version: iOS 8.2, iOS 8.3 and iOS8.4 Beta1 beta. iPhone4 can brush iOS 7.1.2 (if there is a corresponding SHSH backup can be freely downgraded) Note: 1, the most important point: you need to do a good job of backup of important data before brushing, just in case. 2. When the machine is brushed, the mobile phone must be kept fully charged to avoid accidents during the brushing process. 3, the data cable should not use the extension cable or front USB, as far as possible to plug directly into the computer behind the USB interface. 4. Please make sure that the iPhone does not have an activation lock, or know the ID lock account number and password. Otherwise, you may not be able to enter the system after brushing. 5, brush iOS8.4 Beta1 beta system must be checked "Retain user data brush", otherwise it will not be activated after the brush is finished; before the brush must ensure that the iPhone is activated to be exempt. The steps of the brush machine are as follows: 1. After downloading and installing the latest version of Aisi Assistant, connect the mobile phone to the IELTS assistant “Online Resources-Firmware Download” to download the iOS 8.4 Beta1 firmware corresponding to the mobile phone, and click to download. Xiao Bian recommended "Ai Si Assistant (ios perfect jailbreak)" 2, after downloading the iOS 8.4 Beta1 firmware, click on the bottom left corner "Aisi Toolbox" in the "One button brush machine", then click on the right side “ Select firmware & rdquo;, select the firmware you just downloaded; at this time you must check the right side of the "Keep user data brush" & quoquo; 3, and then click & ldquo; immediately brush machine & rdquo;, then enter the DFU mode according to the prompts. The DFU mode is required to be manually operated on the mobile phone. 4. After entering the DFU mode, the flashing will be performed automatically. 5, the brush machine is automatically completed, as shown below; waiting for the boot to complete without activation can use this article from [system home] www.xp85.com