Ios7 updated, phone keeps rebooting after a logo

Iphone 4 (AT&T) updated with IOS7 and phone initially had issues activating but once activated, it just keeps rebooting....as soon as the logo pops up, goes down again and comes back with logo and keeps doing since last night. Tried to connect to itunes but as it is not staying up till itunes recognizes it. Tried DFU mode but won't stay that long either.
it worked perfectly prior to that and updated all IOS updates till now and no issues.
need help.

Sorry to hear that you lost all your data
When you update directly from the phone only the changes from the previous version are downloaded and the download is therefor smaller then the one you get in SUS or PCC which downloads the entire firmware.
I also get some pop/clipping sound when making a call while listening to music so this is not a problem with your phone. I can forward this as feedback.
 - Official Sony Xperia Support Staff
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    Yeah my is the same. Ive had enough of it now...Its been a week of my phone crashing & apps crashing, camera crashing, call dropping out all the time. I've had enough. Apple have done nothing to help it. Ive an upgrade & myself & my partner are buying samsungs.
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