11 Replies Latest reply: Dec 13, 2010 10:12 AM by wjosten
LostSoul 301281 Level 1 (0 points)
I bought an iPhone 4 two weeks ago and I still cannot get it to detect my wireless home network.

I use a Time Capsule as my router, which is plugged directly into my modem via ethernet.
My Macbook can find my network/TC fine, and has done since I bought it.

My wireless settings are 802.11n only (5GHz) with wireless security set to WPA2 Personal.

I tried changing my settings and found that the only one that worked at connecting my iPhone was 802.11n(802.11b/g compatible), but it caused serious problems.
The connection between my TC and Macbook was severely reduced, and it could not detect my TC in Airport Utility, so it would not run the Time Machine back-up, and I was unable to get access to the settings to change them back.

I had to do a full reset on my TC(power down, hold reset button in and power on again) about six times before I could get it all working properly again and get access to the settings.

If I try to manually search for my network on my iPhone, it still will not find it.
It will find other peoples networks, but not mine.
And my current settings are the only ones that work perfectly with my Macbook and Time Capsule.

Any help?

2.1GHz Macbook, Mac OS X (10.5.8)
  • wjosten Level 10 (94,210 points)
    The iPhone 4 will only see "N" on 2.4GHz, if you're broadcasting on 5GHz only, it will never see your network. If you want to maintain a 5GHz network, you need a dual band router.
  • Allan Sampson Level 10 (123,405 points)
    My wireless settings are 802.11n only (5GHz) with wireless security set to WPA2 Personal.


    Therein lies your problem.

    Copied from this link.

    http://www.apple.com/iphone/specs.html

    +Cellular and wireless+

    +UMTS/HSDPA/HSUPA (850, 900, 1900, 2100 MHz)+
    +GSM/EDGE (850, 900, 1800, 1900 MHz)+
    +*802.11b/g/n Wi-Fi (802.11n _2.4GHz only_)*+
    +Bluetooth 2.1 + EDR wireless technology+

    I also have a TC which supports simultaneous dual band. I have two bands or networks - one 5GHz for my MBP, Time Machine Backup, and Apple TV, and another set to 2.4 GHz for my iPhone. The name for one of the networks includes 5GHz with the name and the other doesn't, which is the one I connect my iPhone with.
  • gumsie Level 4 (2,155 points)
    LostSoul 301281 wrote:
    ..............and I was unable to get access to the settings to change them back.

    even with a cable?
    And my current settings are the only ones that work perfectly with my Macbook and Time Capsule.

    This has been answered but if you don't already do this;
    Airport Utility/File/Export configuration file...
  • LostSoul 301281 Level 1 (0 points)
    How do I set up duel band?
    I changed my settings to 2.4GHz, and so far, so good.
    I can still see my TC, it's still backing up and I can still gain access to the Airport settings.
    I guess I must have missed this setting when I was trying them out.
  • wjosten Level 10 (94,210 points)
    How do I set up duel band?


    You need a dual band router/TC. So, is yours dual band?
  • LostSoul 301281 Level 1 (0 points)
    I can't see any options for duel band.
    Which probably means it isn't.
    It's a 500GB version which I bought in late '08/early '09.
  • wjosten Level 10 (94,210 points)
    The dual band models were not introduced until March of '09, so most likely yours is a single band model. What's the model number?
  • LostSoul 301281 Level 1 (0 points)
    The model number is A1254.
    One thing I've noticed with switching to 2.4GHz is that my signal strength drops and back-ups take longer than normal.
    In general, my connection is slowed down.
  • wjosten Level 10 (94,210 points)
    That is the older Time Capsule which does not have simultaneous 2.4GHz and 5GHz operation. Many things can affect a network on the 2.4GHz frequency, the most common being cordless phones-they will interfere/slow down a network significantly. Another thing to check is your broadcast channel-you want to look for WiFi networks near you on the same channel.
  • LostSoul 301281 Level 1 (0 points)
    Not sure how to check which channel nearby networks are on, but I've switched back to 2.4 again, and this time changed to a specific channel rather than automatic.
    Hopefully this will help with any slowdown.
  • wjosten Level 10 (94,210 points)
    Get this app:

    http://wlanbook.com/wifi-scanner-v1.1-mac-os-x-snow-leopard/

    Normally, the best channel to use is either 1, 6, or 11. These channels do not overlap. However, most routers in the US ship set to channel 6. Use the app I referenced to scan for networks in your vicinity. You will be able to see their strength & the channel they are broadcasting on. But, remember a cordless phone broadcasting on 2.4GHz near your network will play havoc with your network.