Before you upgrade your iPhone, here are 5 things you need to know:
1. The upgrade process is irreversible. Once you've upgraded to firmware 1.1.1, you won't be able to downgrade to firmware 1.0.2 or restore using any ipsw firmware file.
2. The new firmware has strong security. Even if you manage to upgrade to the latest firmware, you can't guarantee that your iPhone will be intact. Of course, some people may have good luck and successfully upgrade, but that's just luck - don't count on a new jailbreak coming out.
3. Buy music from the WiFi Music Store in iTunes. Now, you can buy music from the WiFi Music Store in iTunes and transfer it to your computer. iTunes will create a custom playlist for you.
4. Double-clicking the home button and double-clicking the space bar seem pretty cool. It's unclear whether they're cool enough to make you stop using third-party apps on your iPhone.
5. Use your iPhone as a mobile hard drive. If you want to store some files on your iPhone or iPod Touch, you can download the software below. However, this software can only be installed on Intel Macs.
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