iPhone 4S does not password wi - Fi. No data in the IP ADDRESS fields

I have iPhone 4S and recently updated to, ios9.3.1.  My wifi will not accept the password. I have restarted and also forget this device but to avail. No data is in each of these fields on the section of the IP address of my wi - Fi under settings.  My iPad still works perfectly. Help - in simple terms please, nothing too complicated.

I have exactly the same problem - as soon as the iPhone 4S restarted after update 9.3 9.3.1 it wouldn't connect to the WiFi.

IPhone 5 and iPad 2 Air running 9.3.1 work fine on WiFi in the same room.

Apple has said I have to pay $ 200 for a repair or buy a new phone...

Tags: iPhone

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