IPhone 6 Plus Strange Wifi Issue

Picked up on iPhone 6 Plus on friday, love the phone so far. I am having one issue with the wifi download speeds that I've managed to isolate to this device.
I have a 100Mbps connection that I usually get between 70-80Mbps down with a ~6ms ping (checked on my macbook pro, iPad, iPhone 5S and 5C).
Now, when running the Ookla speedtest (or any other speedtest app & in browser) on my new 6+, I get abnormally high ping of around 136ms. Then when the download test begins it shoots up to 20Mbps for a split second, then right back down to around 4Mbps. Where it slowly increases to around 9Mbps.. this is where it gets weird - the download stalls, for about 3-4 seconds and gradually grinds to a halt. Looking at the speed test graph, the lines shoot up high for a sec, then it just 'flatlines' for a few seconds.
This is with every speed test I've checked - it's like the wifi radio loses power for a few seconds and cycles itself off and on. I have reset the network settings already, to no avail.
I've done some looking into this since yesterday and made sure everything is OK on my router side. Low interference, good SNR and few devices connected at once. It seems to be the iPhone, or the iOS 8 software that's doing it.. however my partners 5C on iOS8 does not have this issue.
Is it faulty?

I have this exact same issue with the iPhone 6 Plus. After numerous calls to AppleCare several resets and restore restores from backup, restore as new, and visits to the Genius Bar at the Apple store, Apple dose not appear to have an answer yet. This is happening on all Wi-Fi networks home, Xfinity, Apple Store, and Starbucks. It does not appear to be related to the Wi-Fi network in use. I have been asked to give it a week and see if it gets better but somehow I do not think this is going to work. The Apple Store has even replace my phone and I still experience the same issues.
What am I missing?

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DanFromBoise wrote:
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Sent from Cisco Technical Support iPhone App

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Message was edited by: Jacksoncao

Hi
As your probably aware this is a large problem with most 4 users at the moment you could try some of these quick tips may help?
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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.
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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.

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.

TS1398 Got the dreaded no wifi on my wife's iPhone 4S. Wifi greyed out and no luck with the reset network instructions. Why isn't Apple addressing this issue? We are a family of Apple product users, 2 ipads, an ipad mini, 4 iPhones but one isn't working!

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Just out of warranty. This is a software issue. everything was ok until the software update. Apple just need to sort it out.

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