Want the answers to questions about the iPhone? You'll find questions and answers here.
Can somebody please tell if this works good, I haven't update it yet, I saw so many people complaining about the iOS 7 on iPhone 4 but now with this 7.0.3 update I would like to know if it works okay.
What did you expect in a support forum? The millions of users who are NOT having problems with iOS 7.0.3 on their iPhone 4 aren't going to post here. Heck, they probably don't even know the forum exists!
Neither I, nor anyone I know with an iPhone 4 is having trouble with any version of iOS 7. The VAST majority of people aren't. Does this mean you will not have problems? No, but the odds are overwhelmingly in your favor for not having any problems whatsoever.
My daughter inherted my iPhone 4S and just did the upgrade to 7.0.3 and it's working fine now. She did have problems with her iMessage going out as regular texts and staying connected to the internet, but nothing a phone call to AT&T and Xfinity/Comcast couldn't fix.
She spent a total of about 45 minutes on the phone with both companies.
I hope that helps?