iPhone 5 - No Hard Reboot (or DFU mode?)
 

Whenever my iPhones act up and do strange things such as Bluetooth not cooperating, or not beging able to use data even though I have a good signal, etc.. I do a hard reboot by holding down HOME and POWER until the phone resets. My iPhone 5 won't reboot this way no matter how long I hold both down....

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Courtesy of WestNet Wireless
www.westnet.ca