Many users (especially users of old models) are reporting that iOS17.4.1 consumes too much power, the battery life is not good, and the heat is serious, today I suddenly found that Apple's IOS17.4 RC (21E219) version of the verification channel is still open, a bit unexpected! And it also supports downgrading, friends in need hurry up to download and flash.
iOS17.4RC version is iOS17.4 quasi-official version,iOS17.4RC version was tested when it was just released,The signal is particularly stable,Especially in the same elevator, the signal has 1-3 grids,But it is stable in 2 grids,Brush Douyin will not appear incoherent problems,It's quite smooth,As for the signal performance outdoors,These 2 versions are about the same,Both can last for a long time in the full grid signal。
In terms of battery life, there are still some improvements compared to iOS17.4.1 version, such as iOS17.4.1 Douyin 1 hour power loss 13%, current version 1 hour power loss 11%, play King Glory 2 hours power loss 34%, the current version of this version power loss 29%, battery life is up to some extent.
Fluency performance,iOS17.4RC version gives me the biggest feeling is that the screen sensitivity has been improved,Whether it is the transition animation of switching multi-tasking or the sliding operation in the mainstream APP, it will be more smooth and smooth,In the words of the industry, it is more "handy"。
However, it should be noted that this version is in light use,For example, brushing Weibo for a long time,WeChat video will be accompanied by heating,This kind of heating is acceptable in the current winter,But if it's in summer,I'm afraid this kind of temperature control performance is unacceptable,When playing large games, it's slightly lower than the previous version。
Downgrade method one
Download the hourglass tester and connect your iPhone to your computer, which is the easiest.
Connect your iPhone device to the computer, click "Smart Flash" above to enter the "One-click Flash" interface, and the firmware will be automatically matched if the connection is successful; Then select iOS17.4.RC version to downgrade the iPhone model and firmware package. Tips: iOS17.4RC version downgrade can not save data, users need to save the data by themselves, uncheck the check to save data, and wait patiently for the flashing to complete.
Downgrade method two
Download the official iTunes on your computer and connect your iPhone to your computer, which is also my most recommended way.
iPhone enters DFU mode, Mac computer press and hold the option key, and click Restore at the same time to select the firmware, and the progress bar is successful!
Before downgrading, please note the following:
※1. Before flashing, please back up important data, or check "Keep user data to flash" to prevent the loss of important data;
※2. Please make sure that the mobile device is not activated with activation lock, or know the ID lock account and password, otherwise the device may not be activated after flashing.
※3. If you want to downgrade to another version of "Apple has not closed verification", it is not recommended to check "Keep user information to flash", as the device may fail to flash or the device may be abnormal after successful flashing; It is recommended to use AISI Assistant to classify and back up the data first, then flash the computer again, and then classify and restore the data after success;
If you have downgraded to iOS 17.4 RC release candidate and want to upgrade to iOS 17.5 official version, you can upgrade through the OTA delayed upgrade method, which is the same as the normal upgrade, but there is also this method of upgrade, and there are no sequelae.
Vocabulary analysis
- RC (Release Candidate): A release candidate, which means that the software is close to official release and the quality is very close to the final product.
- Device Firmware Update (DFU): The device firmware update mode is used to restore the device or perform downgrade operations.
- Over-the-Air (OTA): Over-the-air (OTA) technology refers to updating device software over a wireless network.
- Heat: Refers to the heat generated by the device during operation beyond the normal range, which may affect the performance and user experience of the device.
- Battery life: refers to the amount of time a device can continue to work on a single charge.
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