HT1688 iPhone 4S no WiFi anywhere iOS 5 after Apple Tech help same issue on iOS 6

Question

ISSUE  - can not connect to any WiFi hotspot at all
Several weeks ago my daughters iPhone 4S AT&T (on iOS 5) phone number failed to connect to any WiFi hotspot on her college campus including: campus wide WiFi, Starbucks  or her Cisco 1500 WiFi in her dorm room.  She has an iPhone 4S under warranty (I think now in the range of 30-20 more days).
The iPhone couldn't find any WiFi at all, but her roommates iPhone 4 worked perfectly everywhere on all hotspots.
So I have been paying for massive data overage charges with AT&T because the iPhone 4S is broken.
AT&T and then APPLE tech support first  call 4 hours long
She rented a car and drove home 47 miles (94 miles round trip) and spent the afternoon a few Sundays ago and I spent 4 hours on the phone with AT&T and then Apple support.   I was weird I pointed our that her phone was 0.06GB over capacity e.g. a yellow caution alert in iTunes - but the Apple tech on the phone said just back it up and we would reset and restore it.
We did all the usual stuff with AT&T and then they gave up and moved us to Apple (backups, resets, then a full system factory revert, and restore) - it was brutal I hadn't seen my daughter in 2 months and her entire visit was a tech support nightmare.
Despite saying I did not want her to upgrade to iOS 6.X - the apple tech wanted to do a full restore BUT the restore procedure triggered an unwanted iOS 6.X upgrade  (and wiped the phone and started a massive download) without my permission - it was a slow painful 1 hour 40 minute download.  Worse yet I kept thinking that if she is 0.06GB over capacity and the iOS 6.X is "bigger" than 5.X what was going to happen to her phone ?  The apple tech got testy with me when I pointed this out I had to say "you know if a glass of water is overfilled by 0.06 and you want to replace 2 oz with 3 oz (e.g. the iOS upgrade form 5 to 6 ) then obviously it will spill some more - she didn't get it.
So I have a near 2 hour download - scheduled a call call back but was hung up on (Apples IP phone system couldn't here me talk) and had to go back through AT&T's 611 support number support to get an Apple technician since the Apple line said it was closed - her iPhone was in a limbo 1/2 upgraded state waiting for user input in iTunes.
During the restore (I say during not after) that her WiFi did start working while the apple tech was on the line BUT the restore was still gong on in the background - her camera roll took 16+ hours to restore ( yes sixteen hours !!!) - during which time she left the phone tethered to her Mac-book didn't use it and left her Mac-book attached to a power source. 
Overall she says that lost some data and her also her music playlists on her phone, and it did connect to WiFi when the rep was on the line and when she first got back to the her college campus.
Comments (not related to the issue at hand):
1. Overall this was a very very time consuming experience - I am a computer guy (not stupid but not super Mac knowledgeable either) but it seems to me that we should be able to attache the iPhone to iTunes and Apple should be able to remote control everything instead of saying click her click there and having Apple technicians say there is a non-existent menu (she was mixed up between Mac OS-X and Windows PC iTunes) here etc. etc.. Seriously why have the end user involved this is 2012 and if the iTunes is on the Internet there is no excuse for not granting access to Apple Tech!
2. As for iOS 6.X (I loaded it my IPhone 4) your maps are crap and useless I hate it thanks for giving me a worthless mapping system - I gout out my old GPS unit and put it back in my car.  Seriously give us back Google maps. My other daughter gets pop-ups upgrade to iOS 6 but can not load iOS 6 because it then says not enough space.  What a joke !
---------------------------------------ISSUE recurred after 1-2 days can not connect to any WiFi at all
But it only worked for one (1) or two (2) days and then under iOS 6.X the same issue started happening.   Her iPhone 4S failed to connect to any WiFi hotspot on her college campus (LMU) including: campus wide WiFi, Starbucks  or her Cisco 1500 WiFi in her dorm room.  The exact same thing.
I keep getting hammered on over use cellular charges from AT&T despite she should be cooked due to all the WiFi radiation coursing through her body on campus form both her own Cisco 1500 hotspot and the campus wide network.
---------------------------------------AT&T  tech support second call AT&T said the phone was broken Apple should replace
So it only worked for one (1) or two (2) days despite my daughter driving almost 100 miles and being sucked into a a marathon 4 hour tech support nightmare with Apple.  The net result the exact same thing started happening again no WiFi capabilities again.  So I had her call AT&T at 611 and the AT&T technician talked to her looked at the lengthy case notes from the prior call e.g. the history and said that the iPhone 4S was defective phone no point in wasting another four hours of every one's time.  She was told by AT&T to go to the Apple store get the iPhone replaced as it was under warranty.
Problem is that she has no way to get to the Apple store (no car) so I now have a 94 mile round trip to pick her up and go to an Apple store before her one (1) year warranty expires - as such I made this appointment.
I did some more research and this seems to be a pretty big problem for people - Apple is hiding the issue hoping people just go away and they have no concept of cost and time that they force down customers throughts to debug problems.  
It even seems like Apple actually hid a known problem from me during my initial four hour tech nightmare that Tim Cook admitted publicly on Sept 24, 2012 (last few links) see below links for further research:
https://discussions.apple.com/thread/4351894?start=0&tstart=0
http://forums.macrumors.com/showthread.php?t=1462046&highlight=no+wifi
http://forums.macrumors.com/showthread.php?t=1456066&highlight=no+wifi
http://forums.appleinsider.com/t/152837/tim-cook-acknowledges-disabled-greyed-ou t-wifi-issue
http://bpmredux.wordpress.com/2012/0...he-little-guy/
http://bpmredux.wordpress.com/2012/09/24/tim-cook-shows-youre-never-to-big-to-re spond-to-the-little-guy/
All in all Apple is really dissapointing me 5 iphones and the newer they get the more bugs 3G worked great no issues, iPhone 4 no major issues, iPhone 4S buggy WiFi - never want to use an iPhone 5 form what I am reading.

Answer 1

No one is going to read your lengthy post.
If the basic troubleshooting steps outlined in the User Guide don't work, then bring your phone in for replacement.