Wi-fi issues with new 3.1.3 update

If you look up the thread a few messages you will find someone who downgraded to 3.1.2 and it did not fix the problem, then upgraded again to 3.1.3 and the problem was resolved. There are also a lot of messages in the past complaining about this problem in 3.1.2, so it is very unlikely that it is a bug specifically in 3.1.3. It's much more likely that it is an artifact of installing firmware of whatever version.

Thanks to those who suggested restarting the router. In my case, it was indeed the DHCP server dying at some point. My problem has been solved!

I think i found solution for my problem after upgrade to 3.1.3.
It was encryption mode.
On my Access point with WPA-PSK iphone make connection to the wi-fi but cannot connect to web (the strange thing it's that it's possible to access to local device like AP or network printer)
So i configure it to WEP and now everything is OK.

Another test i done it was to turning on the mac filtering on the AP, but there was no way to let the iphone work.

I hope that will be an update soon... WEP it's not a really secure encription, it can be hacked in 5 min!

Although it got things working for you, that solution is not good enough, We shouldnt have to lower security in order to use the handset via wifi!

I dont think it would help me much anyway. I can connect and browse the web via my wifi fine - its just the speed is so slow that it makes iPlayer or Youtube videos unwatchable, as they just dont download. I should be able to use all features of my iPhone, like I paid for, rather then just the basics because of slow speed. In fact, I sometimes have to switch off wifi and watch Youtube videos via 3G, because its faster then wifi!

Before 3.1.3 I could achieve speeds of 7MB via wifi perfectly fine. This rules out my router being the issue - even though I am using WPA security. DHCP is handing out IP's perfectly fine - so no issues that end.

The issue is with the iPhone itself.

All yesterday evening I was getting speeds of under 0.10MB via my iPhone (I checked speeds via my laptop over wifi also to ensure my ISP was not at fault, and I got 10MB with the laptop - so ISP or router not the issue).

However, I got up this morning, and got a speed of 6MB via my iPhone again??!! I bet when I get home it will go back down to unusable. The speed just seems to fluctuate whenever it feels like it.

I am using a cable internet connection - so the contention ratio does not apply. I do not share my line so my speed is always a constant 10MB at all times of the day, whether its a busy period or not.

I am employed as a network engineer. I work with computer networks as a living. Ive ruled out all other possibilities. The issue lays with the iPhone itself, or the recent 3.1.3 update.

Happened to me when my battery went flat.
I had to re enter the password of my router into my router, then enter the password into my phone and it linked.

IftiBashir wrote:
I am using a cable internet connection - so the contention ratio does not apply. I do not share my line so my speed is always a constant 10MB at all times of the day, whether its a busy period or not.

As a network engineer you should know that there is not a conventional contention ratio on cable, but you should also know that you are actually sharing - its just that you are on an ethernet style system with constant data rate, but actual throughput does vary as others use the same bandwidth, and you get packet collisions.

If you ran a speedtest, the line speed would be the same but the throughput rate would drop, unless you are lucky enough to be on a lightly used part of the network.

(25 years in carrier networks here so I've had this discussion before)

I was referring to the conventional contention ratio in comparision to users on standard phone lines in order to keep things simple, rather then getting over-technical in the thread ;o)

I'm getting sick of this issue.
0.03MB from a 10MB connection? It's so slow at even browsing web pages that I give up and use 3G instead!
I've had an Apple rep contact me for further information and phone logs etc but heard nothing back.
Come on Apple. Sort the issue out.

Roru wrote:
I think i found solution for my problem after upgrade to 3.1.3.
It was encryption mode.
On my Access point with WPA-PSK iphone make connection to the wi-fi but cannot connect to web (the strange thing it's that it's possible to access to local device like AP or network printer)
So i configure it to WEP and now everything is OK.

I did not encounter that. WPA2 only: ok.

Another test i done it was to turning on the mac filtering on the AP, but there was no way to let the iphone work.

Same here: MAC ADDRESS filtering is death for the Iphone.

I hope that will be an update soon... WEP it's not a really secure encription, it can be hacked in 5 min!

Isure hope MAC ADDRESS filtering will work ok, that is my primary defense.

Me too. I rebooted my router and the problem was solved - yipee!!

My iPhone 3G refuses to connect to any WLAN since the update to 3.1.3.
First, I cleared all the settings and caches, then I reinstalled 3.1.3 and at last, I downgraded to 3.1.2 and upgraded to 3.1.3 again.

Still, the Phone refuses to connect to any WLAN that worked flawlessly prior to the update.

Any clue anyone?

sadrian80 wrote:
My iPhone 3G refuses to connect to any WLAN since the update to 3.1.3.
First, I cleared all the settings and caches, then I reinstalled 3.1.3 and at last, I downgraded to 3.1.2 and upgraded to 3.1.3 again.

Still, the Phone refuses to connect to any WLAN that worked flawlessly prior to the update.

Any clue anyone?

Try Resetting Network Settings or restoring the iPhone and setting it up as a new device.

I am having the EXACT same problem.

If you tried all the steps in Apples tech bulletin ( http://support.apple.com/kb/TS1559 )and still no joy, try switching channels on your router and/or switching from g/b to b only. That worked for a recent poster here.
http://discussions.apple.com/thread.jspa?threadID=2345332&tstart=0http:

Thanks, it worked for me. Now I have my wifi back. Will see how long, but now I'm happy! 🙂