Currently I'm using iPhone4 with iOS 7 beta 3 release and I'm facing some major issues.
1. Unable to play the music from the native applications such as iTunes
Please let us know now, resolution for this
Well... check Apple Dev Support site and find out if it's a known issue with this release. It's beta software, after all... if it's not an issue, then as a developer, Apple's kinda hoping you'll submit a bug report! ... that's the point of making beta software available to developers.
If you're NOT a developer, and you're running a beta OS on a device you want to have working normally, then you're a few cans short of a six-pack.