Q: iphone 5 only connects fine to 5Ghz Wifi
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Aug 29, 2016 7:09 AMby jdo_apple,HelpfulHello iovin80,
Thank you for using the Apple Support Communities. I know having an issue connecting to Wi-Fi on your iPhone is not what you expect. If I understand correctly, you are unable to connect to a 2.4 GHz Wi-Fi network, but the 5GHz channel works fine. I suggest testing this on a different Wi-Fi network to see if the issue is resolved. You should also check out the recommended settings to prevent interference in these articles:
Potential sources of Wi-Fi and Bluetooth interference
Recommended settings for Wi-Fi routers and access points
Cheers! -
Aug 29, 2016 7:16 AMby iovin80,Thanks for the feedback!
I tried on many Routers (home, work, friends... ) and I only get the iPhone properly connected when it's a 5Ghz wifi.
I tried also different channels, I restored the iPhone many times (with and without backup), the iPhone is updated to latest version 9.3.5.
It's quite annoying because the 90% of wifi networks are 2.4Ghz...
Is there a way to check if it's a hardware or software problem? and if it has solution?
Thanks in advance
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Aug 29, 2016 8:03 AMby chris_g1,Great, that additional info really helps. It sounds like you have narrowed this down and you need to get the iPhone serviced, but good news is you can find all the options for you here:
iPhone Repair - Official Apple Support
Get your iPhone, iPad, or iPod touch ready for service
Have a great day!
