i have an iphone 4s. it was an insurance replacement and hence i don't know if it was brand-new or refurbished-'new'. but it was only activated a few months ago so in its current state it is virtually new even though its out of warranty. anyway the wifi started to drop its connection and after a restart the wifi was grayed out (although the blue-tooth is still working). i know it is a common fault and i know some have found 'fixes' - which i would prefer not to try! anyway, the fault appeared shortly after a firmware update (from 6.0 to 6.1.3) which i see from other threads is not uncommon. i also see that most other people have not been offered much help from apple if their phone is out of warranty - like mine. i took the phone to an apple store (london-uk) and they said they know about the problem but its a fault in the hardware revealed by the firmware so it is not their problem, though they offered me an out-of-warranty-replacement with 30 days warranty. however, my situation may be different from others: in so much as i knew the 'grayed-out-wifi' was not uncommon with 4s phones (as well as battery problems) and since my phone was working fine with firmware 6.0 (and not under warranty), i decided i would not update the firmware anytime soon. then one fine day i went to the apple store in London to get help with a sim-card related issue and i noticed that when the genius was finished with my phone it was now running 6.1.3. the genius had upgraded the firmware (probably via wifi) without asking me or even telling me that he had done it. i did check the wifi signal in the store and saw it was ok and left the premises. soon after i noticed the wifi problem as mentioned above. so the genius rendered my smart-phone 'not fit for purpose' with the update, not me. does anyone know if that would make a difference in my claim for a replacement iphone? is a genius allowed to make the upgrade without consulting with the customer (surely not)? i understand all iphones connect to an apple server when ever the firmware is upgraded or restored and so theoretically apple could verify my story that the phone was connected to their network when the upgrade took place and that it was at the same time as my appointment with the genius. so any advice about how to approach apple with these facts ? - to convince them that even if the hardware fault was already there that it was the genius who stopped my phone's wifi - and if the upgrade had not taken place perhaps wifi would have continued to work for another year or 2 or even 5 (like my trusty old 3g). thanks in advance for any advice, tips and suggestions.