No Wi-Fi signal but Internet working-iphone 5?

Since last week my iphone 5 shows no Wi-Fi signal even though I have Wi-Fi connected and its working… Any issues? Also the call button hanged two times today… And my phone also hanged two days ago for a short while… My iphone is in good condition, never dropped or anything. Is there any hardware problem?

Yeah it's a hardware problem. Go to apple. They will go ahead and give you a new phone.

You might be using data 4g.3g

Iphone 5 has too many problems you should trade it for a 4

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