I have a 5th Gen Airport Extreme, and I'm using the single network, dual band setting. But twice I've had unbelievable trouble trying to get it to connect with my iPhone 5 and end up having all the same symptoms listed in this thread. Each time, I've found the Multicast Rate went back to High. When I reset it back to low, I get amazing wifi throughput anywhere in the house.
My iP5 has no problem connect to TimeCapsule. But it always connect to 5GHz band. My iP5 has problem connect to router that only has 2.4GHz band. I will find time to put my TC to operate only at 2.4GHz band to test.
Im on 6.1.2 iOS and have issues with wifi range. I was try all solutions from this discusion but my wi fi range is 4-5 meter from router.... My personal oppinion is that problem is with hardware connection on wireless antena..
I read some cases where ip5 had a good reception wifi on ios6 and after update on 6.1 or 6.1.2 problem is started. That fact give me a little hope that could be a software bug..
I think I found the best way to demo wi-fi issue in iPhone 5 to Apple representatives. Check this video I have made (sorry for the quality, the video was taken by my small daughter): http://www.youtube.com/watch?v=B7PEoTFtZL4
Where all my devices show speed at least 6 mbit/s iPhone 5 shows 1.5 and if I put it on my hand wi-fi is dead completely but still shows signal presence.
Extremely frustrating that there hasn't been any info from Apple. If it is a hardware issue it is widespread enough to becausing this many of us issues and some with multiple phones. Here is my chronology...
Upgrade from 4 to 5 about 9 months ago.
Do it as a back up from iCloud.
Have the issues with wifi freezing and dropping off; AT&T LTE doesn't kick right in either when wifi drops off.
Lived with it thinking it was a software issue.
Multiple iOS upgrades and no fix.
Called Apple - have me reset settings (all over iCloud)
Go to store and they replace it (oddly never DFU reset that phone).
Replacement is set up as new phone.
A little better but still having the issue.
Back to store and they DFU it and set up as new phone again.
Still having issue.
Back to store.
Another replacement and setting up as new phone (pain in the butt at this point).
This just happened today and I've gotten it to have the issue where it stays connected to wifi but freezes already.
I travel for work and it sometimes happens on hotel and restaurant networks. It seems not to happen on open/unsecured networks.
My network at home is Fios router running the network DHCP etc. with Time Capsule in bridge mode as the wifi access point. I've tried 2.4 and 5 ghz both have the issues. I've tried my DNS as well as the 18.104.22.168 and 22.214.171.124 Google DNS. Seem to have better luck with Google.
On my network at home I have iphone 4, 4s, ipad 2, ipad 3, apple tv, mac mini, macbook pro, samsung tv, samsung blueray, nest thermostat, nook and who knows what else I'm forgetting and the iphone 5 is the only thing I've had this problem with.
Seriously Apple... you admitted the Maps faux pas... in my book this is WAY WORSE. Is this software or hardware and what is being done to make it right?
I posted back on p. 250 and wanted to update, in case it helps anyone else. I had an iPhone 5 with wifi connectivity issues -- networks either couldn't be joined or, if joined, there would be only brief windows where data would transfer, and then requests would time out.
After troubleshooting every conceivable software/firmware issue, resetting the phone, etc., I finally swapped the phone at my local Apple Store a couple weeks ago, and my replacement phone has had no wifi problems.
So, in my case, this was absolutely a hardware issue.
I tested My iP5 to connect to TC at 2.4GHz.
At 2.4Ghz, the iP5 connected and Speedtest worked well at 1meter from the router, when iP5 is at 2meters away,signal bar dropped to 2 bars and Speedtest only can do Ping.
At 5GHz, the iP5 connected and Speedtest worked well even 5 meters away and blocked by 2 walls.
For my another test with old DLink 2.4GHz router, the Speedtest will not worked 3meters away, and connecting speed is worst than TC at the same distance.
I can't conclude it is HW issue as the antenna used for Transmit and Receive likely to be the same. But it pointed tiwards that direction. And, I am not surprise it shared with the 5GHz. 5GHz required shorter antenna than 2.4GHz. So likely the WiFi is optimized for 5GHz. If this is true, the 5GHz likely to work better than 2.4GHz in all cases. In other words, a slight longer of the antenna or the connecting cable could just resolve the 2.4GHz issue. It more like HW precision issue.
I definetly thinking about raplacing wifi antena. (Im livin in Bosnia and we have not Apple store or Apple care). I was talk with one service man and he tell me that is big chance to be problem with antena ( maybe hw connection is week)
I think Apple is paying for their mistake.....look at Apple loosing stock...maybe they will wise up and realize the consumers disgust with their product will be the destruction of their empire. No visionary and the lack of consumer trust will eventually cause their business to fail!!! Keep up the good work Apple...
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