WiFi loss & battery drain a software issue, not hardware

Question

I wrote the commentary below after installing IOS 7 on a 4S and resultantly losing WiFi entirely and enduring major battery drain issues. After two trips to the Apple store and meeting with their techs at the "genius" bar, I was emphatically told that the issues were entirely hardware related and the only solution was to purchase a new phone. I was told there was nothing more to be done because the hardware was defective... either just use the not-so-smart phone as it is or buy a new smart one.
Well, here's an update on that story. I installed 7.0.4 last night and instantly my WiFi was back on and working. So far today, the battery seems to be back to normal as well, not draining like a giant hole in the levee. I don't know if this will be the same story for anyone else with similar problems. But I can say that the hardware-caused-storyline was bogus. Entirely time coincident with a software update (IOS 7), I lost WiFi and battery. And equally relative to the 7.0.4 update I immediately regained WiFi and battery.
I'm curious if others have experienced this same thing? And if Apple has an official explanation?
Oct 14, 2013 12:37 PM
I  had a perfectly functioning iPhone 4S (64 GB) that I have been very   happy with and has always been glitch-free, good battery time, no   complaints. Until installing IOS 7.
Among other things, immediately upon "upgrading" to IOS 7 I have lost WiFi entirely (button greyed out).
Next, I found the battery drains to the point where I have to keep it   charging 2-3 times per day with extremely small phone usage. In a  normal  day, with 2-3 text messages, checking email 3-4 times and no  phone  calls, I am down to 30% battery by 3pm. Two days ago I turned  airplane  mode on at 9am with 98% battery and by 4pm batter was at 45%  with  airplane mode still on.
There are other problems, but those are the two primary issues.
I   went to the Apple store two times. The first time the technician   verified my problem, said there was nothing that could be done because   it's a hardware problem now and I would have to buy a new phone at full   price (my current cell contract isn't up until March 2014). He  suggested  a complete phone reset to "new phone" which I did and which  solved  nothing whatsoever. Same issues exist.
On  my second  trip to Apple just yesterday the technician looked it over,  checked the  battery function, etc. and I was told that the battery is  fine but that  the processor or something in the phone is working  overtime and draining  the battery. And again, I was told there is  nothing Apple can do other  than swap out the phone, though, this time  they would replace it for  $199.
I  was tempted to pay the $199 for a new 4S  that the technician said  would come with IOS 6. But so far I have  refused that offer without  some assurance that future IOS upgrades  wouldn't harm that phone as  well. Also, if I paid this now, then I  wouldn't upgrade when my  contract ended with Verizon and I was looking  forward to perhaps  getting a 5S then. I know that it's impossible to  assure that these  upgrade issues won't happen again to the next phone,  which finally  leads me to my questions...
Considering   the options I've been given thus far, what would someone more in the   know suggest I do? Is there any possibility of a software fix or did  the  "upgraded" software probably ruin the hardware?
As   a longtime Apple fan and someone who has owned the first Mac laptop  and  early desktops, I don't understand why Apple doesn't have better   customer service policies regarding their own software directly   affecting their own hardware adversely.

Answer 1

 I have the same problem with WiFi and off, the issue was Google Play services, this is what I did settings > apps > all > google play services > clear data > uninstall updates > restart the phone > update the app > check again .