IOS7 Wi-Fi problem, warranty?

Hi, a few weeks ago I installed iOS 7 beta on my iPhone 4S (WITHOUT dev account (free. I liked iOS7 and i kept using it for weeks.
But 3 days ago, the Wi-Fi ON-OFF button grayed out. So I downgraded iOS7 to the last official iOS for iPhone 4s > 6.1.3 to check if that solves the problem… It doesn't.

So my question is If I take my phone in for replacement (with iOS 6.1.3), will Apple notice that I had iOS7 beta installed, and use that reason for not repairing my iPhone?

Sorry for typos, I'm from Belgium.

Added (1). TechNoboOriginal, Of course I can update to iOS 7?! I'm on 6.1.3 and CAN update later to iOS7!

Go to settings> general> reset> reset network settings

If this doesn't work go to your carrier shop before going to apple.eg, telstra, vodafone (australian) or AT&T etc.

Seriously,
IOS 7 currently is for DEVELOPERS only and is not made for the public yet, there will be some bugs, and congrats, when the real one comes out you can't install cuz it'll say that you have the latest version installed.

They will be able to tell. The only way they'll replace your phone is if they see that your device is registered with a developer account and authorized to have used iOS 7. You can register for $5 on http://www.udid.in/ and they literally registered my 4S instantly.

No they won't be able to tell. Just remember to restore without restoring from backup after that. They wouldn't know that IOS 7 was installed onto your iPhone so you can just change it. I've done it before.

P.S I even jailbroke my iPhone, restored it and brought it in. They can't check.

  • Problem with iphone 5s and ios7.1.1? Ok so i can't send messages any more i have no service, my phone says in the left upper corner: searching… ( and that for about already 2days) So i tought about activating my imessages but it also doesn't work, so someone told me to update the new version ios 7.1.1 and when he is finished downloading and i want to install the new version it says this: ( see picture). So what can i do to have my messages and imessages back or to install ios 7.1.1?
  • IPhone downloading iOS7 problem? So I went to download iOS7 but I had too much stuff so then I started deleting stuff but after I deleted the last app both my home and lock screen have stopped working.
  • Iphone and ipad problem! Music transferring problem I have an iphone 4s and an ipad mini. I'm having a music tranferring problem. On my phone i have a bunch of songs and i turned of home sharing with my friend. So i got all of her songs to. i'm ok with that.anyways on my ipad i have all the songs I bought. I want to get all the songs i hve on my phone to my ipad. I don't know how though. I use the same apple id and everything. On my ipad i went to songs not on ipad folder but found nothing?
  • IPhone 5 ios7 long syncing to itunes problem? So recently i just updated my iPhone 5 into ios 7, but when i connected my phone into the itunes it is taking a long time syncing at the last step. I have updated my itunes to the latest version. This is keeping troubling me because i can't transfer any songs, videos and other apps. Please help! My Phone was always at the step 5 of 5, and it is always "waiting changes to be applies".It really take a long time and i can't even transfer anything till now.