HT4623 After updating Iphone 4s to 6.0 the signal is very weak and the phone drops calls frequently.

After updating Iphone 4s to 6.0 the signal is very weak and the phone drops calls frequently.

Based on what?
"When Apple rolled out iOS 6.1, its first major update to iOS 6, yesterday, it introduced a series of bug fixes, software tweaks for iTunes and Siri and also added LTE support - but none of that was any use to the disconnected and discontented sufferers of a particular iPhone software flaw: greyed-out Wi-Fi."
http://www.theregister.co.uk/2013/01/29/ios6_wifi_flaw_no_fix/
The phone is an iphone 4
(converted from a 3g and still have the habit of referring to it as a G)

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