Mate that is not helpful and you are ducking the original issue that boardhedz and a number of other people have pointed out - not just in this forum
The upgrade has affected wifi connectivity
It is NOT A HARDWARE FAILURE
This is an OS issue - and APPLE NEED TO DO SOMETHING ABOUT IT NOW!!!
I dont know what you have in the US, but in NZ there is a consumer guarantees act that stipulates
Subject to sections 41 and 42, where goods are first supplied to a consumer in New Zealand (whether or not that supply is the first-ever supply of the goods), there is a guarantee that the manufacturer will take reasonable action to ensure that facilities for repair of the goods and supply of parts for the goods are reasonably available for a reasonable period after the goods are so supplied.
(2) Part 3 gives the consumer a right of redress against the manufacturer where the goods fail to comply with the guarantee in this section.