How To Solve No SIM Card Installed On iPhone 4S

After we told you that the new version of iOS 5.0.1 Build 9A406 will make enable Siri to the old devices legal ,there have been a problem before all this, it is "Invalid SIM" Or "No SIM Card Installed" which faces some iPhone 4S users,  so Apple has just released The New iOS 5.0.1 Build 9A406 to fix this problem and the problem of battery that we talked about it a lot.

in this post i will show you how to successful installation of  The New iOS 5.0.1 Build 9A406 to fix "Invalid SIM" Or "No SIM Card Installed" on the iPhone 4S, And this is From Apple’s new support document about this Problem :

In certain situations, iPhone 4S may have difficulty recognizing a micro-SIM card, resulting in the following behaviors:
- "Invalid SIM" or "No SIM Card installed" alert appears intermittently.
- Status bar displays "No Service" or "Searching" in a location with good network coverage.

If you want to fix this problem in your iPhone 4S just follow this simple steps from Apple support :

1. Back up your user content and settings using iTunes or iCloud. 2. Restore your iPhone 4S using iTunes. 3. After the process is complete, restore your user content and settings from your backup. 4. To confirm that you’ve successfully restored, verify that the version is now iOS 5.0.1 (9A406) in Settings > General > About.

Note : this problem faces some iPhone 4S users, So if you don't suffer of this problem you don't have to do that , And form this link you can Download iOS 5.0.1 (9A406) .