iPhone 5 screen dims by itself..

New iphone 5 from launch date and occasionally the screen does dim (barely visible) on its own. I lock, then unlock phone and its goes back to the brightness setting I had. No auto brightness is on.

I bought the iPhone 5 two weeks ago and i had the similar problem. Brightness going to lowest brightness settings by itself even though i had auto brightness off. I had it 3 times in a week. However i had another problem, when i have auto brightness on and entering from bright room to dark room didn't make any effect on brightness. It only worked when i entered from dark room to bright room. It's suppose to work both ways without locking screen. I went to apple store and replaced my phone and been using for a week now i have not have any problems until now. Auto brightness works perfect while entering dark room or going to bright room. It changes itself without locking screen. I might think this might be hardware defect or could be software.

I recently updated to version 6.0.2 (10A551) on my iphone 5 and before that had not had a problem with the dimming screen. My screen goes dim by itself at least twice a day since that update. Auto dim is off and the brightness setting is 3/4 of the way up. If i had to make an educated guess based on older posts it would be that this a software issue. I finally get an iphone and this happens.😠

I do believe it is a software issue. Not hardware.

My iPhone 4 did this and it drove me nuts... With my warranty I got the 4S and within a few hours it started happening with it too. When I do a hard reset on my device the phone turns back on and the screen is dim right to barely visible. I go to my settings and it has changed the brightness setting to the bottom. I now have the 5 and still having the same issue. It also happens if I accidentally hit my home button twice when the phone is locked. This is a huge pain in the butt and if restoring to factory and starting fresh is the answer I think it could be worth it!

This just now happened to me for the first time (iPhone 5, 32GB, AT&T, latest iOS). Lovely. I powered off and back on and it's fine, but if it happens regularly, I'm going to be MAD.

Yeah I just had this happen to me. I received a text message, the phone vibrated, and suddenly the screen went dark, but the brightness settings were still at half-way where I keep them.

Do you guys think its IOS 6 ???

Do you guys think its an IOS 6 problem???

My iPhone 5 goes dark very frequently what ever I do, it doesn't matter. It goes dark. I had restored it, rebooted it but still same issue

is your problem solved?

my problem was solved by not backing up from a previous version but from restoring and setting up the phone as new. then i just had to reload everything from my itunes.

It's an iOs6 issue. I've setup a new phone and I'm still getting the same problem. I'm seeing the light dim on a 4s and the 5. I don't know why apple didn't fix this issue on the new update. It's a little ridiculous...

Do you think it would happen on IOS 6.1 ???

I had updated to ios 6.1 and issue still continues...

Dont know what to do with this iPhone now