Following the release of many tweaks defined to fake the Firmware, some users met some issues when they have uninstalled these tweaks. They have a N/A Firmware, then loss of native bluetooth.



Solution

• Then, use notepad++, and create a new document.
• Name it SystemVersion.plist and paste the code below :
  

1.0//EN"
"http://www.apple.com/DTDs/PropertyList-
1.0.dtd">

ProductBuildVersion
7E18
ProductCopyright
1983-2010 Apple Inc.
ProductName
iPhone OS
ProductVersion
3.1.3

• Depending your firmware , change the identification number and number of Firmware :
• 3.1.2 = 7D11
• 3.1.3 = 7E18
• Save your file
• Tranfer with SSH in /System/Library/CoreServices/

Here is premade .plist files for Firmware 3.1.2 and 3.1.3 (must be renamed in SystemVersion.plist) :

• SystemVersion 3.1.2
• SystemVersion 3.1.3