Iphone 4 wifi and bluetooth problem

[Jsweety]

I am having a problem with wifi and bluetooth on my iphone 4..
Wifi..m able to connect to my wifi router only by stending close to it.there too i get very weak signal..
Bluetooth..my bluetooth icon just shows up in settings page of enabling and disabling..once i quit that page(i.e go back to settings main page or quit settings app) bluetooth icon goes off from status bar..
I hve read somewhere that some people are having same troubles after getting upgraded to ios 5..is it true or m having hardware problem..
I am on ios 5.1.1
On 5.1 same problem was there..
Pla help me..
B/w i have tried changing /resetting wifi router...and resetting network settings..
Pla help me out

 

[vivekkumar]

if u reseted network setting every thing should be done..if there is problem still it is hardware related only..it doesnt do anything with ios5.1

 

[Jsweety]

How mich will it cost for repairing??

 

[Jsweety]

www.google.co.in/m?q=ios+5+wifi+problems&client=ms-opera-mini&channel=new