IPhone 3G: Wireless adapter problem

Hi there,
since two days I have problems connecting my iPhone to my wireless network. We have two iPhones and severals other devices in our home network and every device is still working, except this one iPhone.
Is there any chance that the wireless adapter in the iPhone breaks without anything happening, like I didn't drop the phone or something like that. It's just the wireless not working anymore, the network is detected but once I enter the password, it says it cannot connect. Even turning the encryption off doesn't help. The other iPhone still works perfectly.
Has anyone an idea how I can verify that the hardware itself is still working properly?
Thanks and regards,
Seb

Seb S. wrote:
Has anyone an idea how I can verify that the hardware itself is still working properly?
How to verify iPhone hardware is working: http://support.apple.com/kb/HT1650

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    also....
    ich habe einen Carbon X1 20A7005RGE und bei mir läuft alles anstandslos...
    (Netgear Push2TV PTV3000 ,Microsoft Wireless Display Adapter etc..etc..).
    melden sie sich bei mir ...ich weiss wo der fehler liegt.....der liegt bei ihnen sprich in den einstellungen..
    und das hat überhaupt nichts mit Lenovo X1 oder Microsoft..oder Intel zu tun... etc..
    mfg....Semy

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