HT4199 Why can't my iphone 4 find the wifi network at home when my ipad 2 has a full wifi signal?

I have an iphone 4 and an ipad2, I have never been able to fully connect to wifi network at home consistently using my iPhone, whereas my ipad2 connects all the time without any problems. My iphone does not even pick up any other local networks, just wondered if there is a setting I need to adjust or something that I can do to be able to connect to any wifi signal or if I should take my phone back to apple store? Thanks

1. Try doing a hard reset:
Press and hold both the Home button and the Sleep/wake button simultaneously for about 15 seconds and release when the Apple logo appears.
2. If that doesn't work, use this article for troubleshooting: http://support.apple.com/kb/ts1398
3. If that doesn't solve the issue, backup the device and restore it as new.
In that case, use: http://support.apple.com/kb/HT4137
NB: set up as a NEW device because a software issue will be in the backup. If the issue persists after restoring as new, you should offer the device for service.
If you get specific error messages/codes in iTunes when updating/restoring, check this: http://support.apple.com/kb/ts3694 for causes and solutions
If you restore your iPhone to factory settings without a backup and still can't detect/connect to any network, you should offer the device for service.
Good luck
JW

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