iPhone 4 periodically won't wake up

Ditto me. I did backup from 3g, all went well for 3 days, and now the phone has crashed. Got a screen signal to connect to iTunes. Now having to "restore". Hope I can get my apps on and not have more problems. Apple needs to fix.

Returned from the Genius Bar with a new phone. Syncing up now. Hopefully my second phone will be OK.

Won't properly restore. Keeps giving me an error message. Off to the store. Anyone else with this problem - failing to restore?

Just made my appt. for the Apple store, so off I go tomorrow.....I thought I had solved the issue, but it continues to happen.

I think I may be in the clear now with my second phone!!! Thanks, Apple, loving this phone.

I'm having the same problem here... Went to the Apple Store and left empty handed because they have no stock. They said they should have one for me in a couple days.

Meanwhile I've tried everything... Dfu restore, regular restore with and without backup restore, shutting off many different functions... No change. It actually didn't lock up at all last night and I thought I might get a reprieve until the new phone came in..... And it just locked again 😟

I am having the same issue w/ phone not recovering from standby (originally set up as new phone). The only way is to do a hard reset. This is an iPhone 4 32GB which was delivered on 6/23. I just did a restore and will test for the next two days to see how it goes.

Ditto on the issues listed above. Talked to Apple today and they suggested I do a restore to factory specs. Did so, and the phone worked most of the day. However, I was using it pretty intermittently throughout the day. Upon sitting down to watch some tv the phone sat unused for about 30min+. Picked it up and hit all the buttons and it wouldn't wake up.
This is definitely a hardware or firmware issue. It doesn't have anything to do with things running in the background or wifi.

However, it could be an app we are using that hasn't been upgraded as 4.0 tested. But it's hard for me to believe we are all using the same app/s. Going to try to schedule a Genius Bar appointment.

p.s. Oh, by the way. I bought my dad a phone on launch day as well. He has a 16GB model and has had no trouble.

I'm wondering if we should list our model here to verify its all the phones and rule out the possibility that it is just the 32GB model.

So 32GB model here.

Picked up a replacement phone from the Apple store yesterday and have no issues with this phone. Genius Bar did a diagnostics check on the phone & he told me that it had some obvious software issues. His best guess was some app(s) that were not 4.0 compatible, however the 3Gs was not giving me any issues from the update. I'm thinking that the problems came from the initial install as a back up from my 3Gs, & not a new install of the phone. (btw...I have the 16Gb, as I saw early posts noting which phone)
My advice for all of you is to get a replacement phone and do a fully clean install.

I also just received my replacement 16gb iphone4. I have not had any "wake" issues. I did not restore from backup and set it up as a new phone. I also haven't loaded any apps yet as I want to see if the phone works ok first.

So far, so good.

I have a little bit of an update.

I contacted Apple Support and they wanted me to try a full factory restore, see where that got me and then head to an Apple Store for a replacement if that didn't correct the problem.

I haven't done that yet, BUT I haven't had a "coma" incident in going on 36hrs now. The only different thing that I have done is not connect the headphones. Now that I think about it, every time the coma happened before, the headphones were plugged in.

Has this happened with anyone else while headphones were plugged in?