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How to flash Apple 4s phone

2025-10-06 02:07:26 science and technology

How to flash Apple 4s phone

With the development of technology, although the iPhone 4s is already an old model, some users are still using it. Flashing the machine can solve problems such as system lag and inability to update. This article will introduce in detail the steps, precautions and related tools for flashing iPhone 4s.

1. Preparation before flashing

How to flash Apple 4s phone

Before flashing the machine, the following preparations are required:

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Backup dataUse iTunes or iCloud to back up important data in your phone to avoid loss after flashing.
Download the firmwareDownload iOS firmware suitable for iPhone 4s from Apple's official website or other reliable sources (it is recommended to choose iOS 9.3.5 or below).
Install iTunesMake sure the latest version of iTunes is installed on your computer to connect and manage your devices.
Enough powerMake sure the phone's battery is above 50% and avoid failure due to insufficient power during flashing.

2. Flashing steps

Here are the detailed steps for flashing iPhone 4s:

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1Connect your iPhone 4s to your computer via a cable and turn on iTunes.
2Enter DFU mode: Press and hold the power button and Home button for 10 seconds, release the power button, and continue to hold the Home button until iTunes prompts the device in recovery mode is detected.
3In iTunes, hold down Shift (Windows) or Option (Mac) keys, click "Restore iPhone" and select the downloaded firmware file.
4Wait for iTunes to complete the firmware verification and flashing process, and do not disconnect during this period.
5After the flash is completed, the phone will automatically restart and follow the prompts to complete the initial settings.

3. Things to note after flashing

After the flashing is completed, the following points should be paid attention to:

Things to noteillustrate
Recover dataRecover contacts, photos, applications and other data from backup.
Check the systemMake sure the system is running normally and there are no abnormal problems.
Avoid jailbreakUnless necessary, jailbreaking is not recommended to avoid affecting system stability.

4. Frequently Asked Questions

The following are common problems and solutions that may be encountered during flashing:

questionSolution
Failed to flashCheck if the data cable connection is normal, re-enter DFU mode and try to flash the machine again.
Stuck in recovery modeExit recovery mode using iTunes recovery mode or third-party tools such as IS Assistant.
Unable to activateMake sure the network connection is normal, or contact Apple customer service to assist in activation.

5. Summary

Although the iPhone 4s flashing process is simple, it still needs to be operated with caution to avoid data loss or equipment damage due to improper operation. It is recommended that users fully understand the relevant knowledge and risks before flashing the machine, and strictly follow the steps. If you encounter unsolvable problems, you can seek help from a professional.

I hope this article can help you successfully complete the iPhone 4s flash operation!

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