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IPhone 3G cannot find Wi-Fi networks. Help!?

laura331

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My iPhone isn't able to find any Wi-Fi networks. Before this, we had the Wi-Fi button grayed out, so we restored it to fix it. It is no longer grayed out but it cannot find any networks. Every now and again I can connect. It has iOS 4.2.1 and Modem Firmware 05
15.04
 
How did you restore your iOS? when? Is your phone jailbreaked?
 
Graying out is kind of a tough thing to fix, I guess you'd better have your iPhone professionally checked.
 
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