Apple IPHONE4S/5 upgrade IOS7 Bluetooth can not search the device

Problem status

IPHONE4S upgrade IOS7, Bluetooth can not search the device, two iphone4s, in IOS6.0.3 time, can be searched Plantronics Voyager Legend bluetooth Headset! Upgrade to IOS7.0.3, open Bluetooth headset and iphone4s Bluetooth, has been in the display search, can not find the device! Also use other mobile phones at the same time set visible, open Bluetooth, other mobile phones can search this iphone, can also connect, but the iphone will not search other mobile phones!

Solutions

First, check to see if you are trying to reach the range of communications supported by the iphone's paired Bluetooth device, and most Bluetooth devices have a range of about 30 feet.
Second, on the iOS device, tap Settings > Bluetooth, and then locate your device in the list shown. If "Not Connected" appears on your device, tap the name of the device, and then try to connect to it.
Third, tap Settings > Bluetooth, turn off Bluetooth and turn it on, make sure your Bluetooth accessories are turned on, fully charged or plugged in, and restart iOS devices.

Four, click Settings > Bluetooth to find the Bluetooth accessory you are currently connected to or trying to connect to. Then click Lightly to ignore the device. Try pairing your Bluetooth accessories again. If your Bluetooth accessories require a PIN code, you may need to re-enter the pin for that accessory. Some common PIN codes are 0000, 1111, and 1234.
Five, turn off the Bluetooth accessory, and then open it to reboot the accessory and update the device's software to the latest version.
VI, if your Bluetooth accessories have upgradeable firmware, check your firmware for the latest version